Twisted graphene moire superlattice has been demonstrated as an exotic platform for investigating correlated states and nontrivial topology. Among the moire family, twisted double bilayer graphene (TDBG) is a tunable flat band system expected to show stacking-dependent topological properties. However, electron correlations and the band topology are usually intertwined in the flat band limit, rendering the unique topological property due to stacking still elusive. Focusing on a large-angle TDBG with weak electron correlations, here we probe the Landau level (LL) spectra in two differently stacked TDBG, i.e. ABBA- and ABAB-TDBG, to unveil their distinct topological properties. For ABBA-TDBG, we observe non-trivial topology at zero electric displacement filed, evident from both the emergence of Chern bands from half fillings and the closure of gap at CNP above a critical magnetic field. For ABAB-TDBG, by contrast, we find that the moire band is topologically trivial, supported by the absence of LLs from half fillings and the persistence of the gap at CNP above the critical magnetic fields. In addition, we also observe an evolution of the trivial-to-nontrivial topological transition at finite D fields, confirmed by the emerged Landau fans originating from quarter filling v = 1. Our result demonstrates, for the first time, the unique stacking-dependent topology in TDBG, offering a promising avenue for future investigations on topological states in correlated systems.
{"title":"Probing band topology in ABAB and ABBA stacked twisted double bilayer graphene","authors":"Jundong Zhu, Le Liu, Yalong Yuan, Jinwei Dong, Yanbang Chu, Luojun Du, Kenji Watanabe, Takashi Taniguchi, Jianpeng Liu, Quansheng Wu, Dongxia Shi, Wei Yang, Guangyu Zhang","doi":"arxiv-2409.11023","DOIUrl":"https://doi.org/arxiv-2409.11023","url":null,"abstract":"Twisted graphene moire superlattice has been demonstrated as an exotic\u0000platform for investigating correlated states and nontrivial topology. Among the\u0000moire family, twisted double bilayer graphene (TDBG) is a tunable flat band\u0000system expected to show stacking-dependent topological properties. However,\u0000electron correlations and the band topology are usually intertwined in the flat\u0000band limit, rendering the unique topological property due to stacking still\u0000elusive. Focusing on a large-angle TDBG with weak electron correlations, here\u0000we probe the Landau level (LL) spectra in two differently stacked TDBG, i.e.\u0000ABBA- and ABAB-TDBG, to unveil their distinct topological properties. For\u0000ABBA-TDBG, we observe non-trivial topology at zero electric displacement filed,\u0000evident from both the emergence of Chern bands from half fillings and the\u0000closure of gap at CNP above a critical magnetic field. For ABAB-TDBG, by\u0000contrast, we find that the moire band is topologically trivial, supported by\u0000the absence of LLs from half fillings and the persistence of the gap at CNP\u0000above the critical magnetic fields. In addition, we also observe an evolution\u0000of the trivial-to-nontrivial topological transition at finite D fields,\u0000confirmed by the emerged Landau fans originating from quarter filling v = 1.\u0000Our result demonstrates, for the first time, the unique stacking-dependent\u0000topology in TDBG, offering a promising avenue for future investigations on\u0000topological states in correlated systems.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Adi Jung, Samuel Margueron, Ausrine Bartasyte, Sayeef Salahuddin
We experimentally demonstrate coherent Rabi oscillations of Nitrogen Vacancy (NV) centers by magnetoelastic waves. The coupling is consistent with dipolar stray field drive from spin-wave modes in a ferromagnetic film, and displays a significant improvement in Radio Frequency power efficiency relative to other methods of microwave excitation. Further, it demonstrates coherent coupling with NV centers over mm-scale distances from the microwave excitation source. By utilizing a piezoelectric-magnetostrictive heterostucture, where magnetoelastic waves can be launched by an applied voltage, a pure voltage driven coherent drive of the NV centers is achieved. This voltage driven, magnetoelastic excitation enables a new approach to couple with two level quantum states that is not reliant on long spin-wave coherence lengths.
{"title":"Coherent Dipolar Coupling between Magnetoelastic Waves and Nitrogen Vacancy Centers","authors":"Adi Jung, Samuel Margueron, Ausrine Bartasyte, Sayeef Salahuddin","doi":"arxiv-2409.10862","DOIUrl":"https://doi.org/arxiv-2409.10862","url":null,"abstract":"We experimentally demonstrate coherent Rabi oscillations of Nitrogen Vacancy\u0000(NV) centers by magnetoelastic waves. The coupling is consistent with dipolar\u0000stray field drive from spin-wave modes in a ferromagnetic film, and displays a\u0000significant improvement in Radio Frequency power efficiency relative to other\u0000methods of microwave excitation. Further, it demonstrates coherent coupling\u0000with NV centers over mm-scale distances from the microwave excitation source.\u0000By utilizing a piezoelectric-magnetostrictive heterostucture, where\u0000magnetoelastic waves can be launched by an applied voltage, a pure voltage\u0000driven coherent drive of the NV centers is achieved. This voltage driven,\u0000magnetoelastic excitation enables a new approach to couple with two level\u0000quantum states that is not reliant on long spin-wave coherence lengths.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We consider Bloch states of weak spacetime-periodic perturbations of homogeneous materials in one spatial dimension. The interplay of space- and time-periodicity leads to an infinitely degenerate dispersion relation in the free case. We consider a general perturbation term, and, as a consequence of the infinite degeneracy, we show that the effective equations are given by the eigenvalue problem of an infinite matrix. Our method can be viewed as a time-modulated generalisation of the nearly-free electron model. Based on this result, we find that the infinite degeneracy may split into a family of non-degenerate bands. Our results are illustrated with numerical calculations, and we observe close agreement between the perturbation theory and the numerically computed full solution.
{"title":"Perturbation theory for dispersion relations of spacetime-periodic materials","authors":"Erik Orvehed Hiltunen","doi":"arxiv-2409.11514","DOIUrl":"https://doi.org/arxiv-2409.11514","url":null,"abstract":"We consider Bloch states of weak spacetime-periodic perturbations of\u0000homogeneous materials in one spatial dimension. The interplay of space- and\u0000time-periodicity leads to an infinitely degenerate dispersion relation in the\u0000free case. We consider a general perturbation term, and, as a consequence of\u0000the infinite degeneracy, we show that the effective equations are given by the\u0000eigenvalue problem of an infinite matrix. Our method can be viewed as a\u0000time-modulated generalisation of the nearly-free electron model. Based on this\u0000result, we find that the infinite degeneracy may split into a family of\u0000non-degenerate bands. Our results are illustrated with numerical calculations,\u0000and we observe close agreement between the perturbation theory and the\u0000numerically computed full solution.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Nernst and Seebeck effects are crucial for thermoelectric energy harvesting. However, the linear anomalous Nernst effect requires magnetic materials with intrinsically broken time-reversal symmetry. In non-magnetic systems, the dominant transverse thermoelectric response is the nonlinear Nernst current. Here, we investigate nonlinear Nernst and Seebeck effects to reveal intrinsic scattering-free Seebeck and Nernst currents arising from band geometric effects in bipartite antiferromagnets (parity-time-reversal symmetric systems). We show that these contributions, independent of scattering time, originate from the Berry connection polarizability tensor which depends on the quantum metric. Using CuMnAs as a model system, we demonstrate the dominance of intrinsic nonlinear Seebeck and Nernst currents over other scattering-dependent contributions. Our findings deepen the fundamental understanding of nonlinear thermoelectric phenomena and provide the foundation for using them to develop more efficient, next-generation energy harvesting devices.
{"title":"Intrinsic nonlinear Nernst and Seebeck effect","authors":"Harsh Varshney, Amit Agarwal","doi":"arxiv-2409.11108","DOIUrl":"https://doi.org/arxiv-2409.11108","url":null,"abstract":"The Nernst and Seebeck effects are crucial for thermoelectric energy\u0000harvesting. However, the linear anomalous Nernst effect requires magnetic\u0000materials with intrinsically broken time-reversal symmetry. In non-magnetic\u0000systems, the dominant transverse thermoelectric response is the nonlinear\u0000Nernst current. Here, we investigate nonlinear Nernst and Seebeck effects to\u0000reveal intrinsic scattering-free Seebeck and Nernst currents arising from band\u0000geometric effects in bipartite antiferromagnets (parity-time-reversal symmetric\u0000systems). We show that these contributions, independent of scattering time,\u0000originate from the Berry connection polarizability tensor which depends on the\u0000quantum metric. Using CuMnAs as a model system, we demonstrate the dominance of\u0000intrinsic nonlinear Seebeck and Nernst currents over other scattering-dependent\u0000contributions. Our findings deepen the fundamental understanding of nonlinear\u0000thermoelectric phenomena and provide the foundation for using them to develop\u0000more efficient, next-generation energy harvesting devices.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ze-Hua Tao, Icaro R. Lavor, Hai-Ming Dong, Andrey Chaves, David Neilson, Milorad V. Milosevic
We demonstrate chiral propagation of plasmon polaritons and show it is more efficient and easier to control than the recently observed chiral shear phonon polaritons. We consider plasmon polaritons created in an anisotropic two-dimensional (2D) material, twisted with respect to an anisotropic substrate, to best exploit the competition between anisotropic electron-electron interactions and the anisotropic electronic structure of the host material. Gate voltage and twist angle are then used for precise control of the chiral plasmon polaritons, overcoming the existing restrictions with chiral phonon polaritons. These findings open up feasible opportunities for efficient and tunable plasmon-based nanophotonics and compact high-performance on-chip optical devices.
{"title":"Chiral propagation of plasmons due to competing anisotropies in a twisted photonic heterostructure","authors":"Ze-Hua Tao, Icaro R. Lavor, Hai-Ming Dong, Andrey Chaves, David Neilson, Milorad V. Milosevic","doi":"arxiv-2409.11066","DOIUrl":"https://doi.org/arxiv-2409.11066","url":null,"abstract":"We demonstrate chiral propagation of plasmon polaritons and show it is more\u0000efficient and easier to control than the recently observed chiral shear phonon\u0000polaritons. We consider plasmon polaritons created in an anisotropic\u0000two-dimensional (2D) material, twisted with respect to an anisotropic\u0000substrate, to best exploit the competition between anisotropic\u0000electron-electron interactions and the anisotropic electronic structure of the\u0000host material. Gate voltage and twist angle are then used for precise control\u0000of the chiral plasmon polaritons, overcoming the existing restrictions with\u0000chiral phonon polaritons. These findings open up feasible opportunities for\u0000efficient and tunable plasmon-based nanophotonics and compact high-performance\u0000on-chip optical devices.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Imam Makhfudz, Hamidreza Esmaielpour, Yaser Hajati, Gregor Koblmüller, Nicolas Cavassilas
Hot carrier effect, a phenomenon where charge carriers generated by photon absorption remain energetic by not losing much energy, has been one of the leading strategies in increasing solar cell efficiency. Nanostructuring offers an effective approach to enhance hot carrier effect via the spatial confinement, as occurring in a nanowire structure. The recent experimental study by Esmaielpour et al. [ACS Applied Nano Materials 7, 2817 (2024)] reveals a fascinating non-monotonic dependence of the hot carrier effect in nanowire array on the diameter of the nanowire, contrary to what might be expected from quantum confinement alone. We show that this non-monotonic behavior can be explained by a simple model for electron energy loss that involves two principal mechanisms. First, electron-phonon scattering, that increases with nanowire diameter, leading to hot carrier effect that decreases with increasing diameter. Second, electron capture by a defect level within band gap, that is, a midgap state, that decreases with nanowire diameter, leading to hot carrier effect that increases with increasing diameter. The two mechanisms balance at a certain diameter corresponding to optimal hot carrier effect. Our result offers a guideline to optimize hot carrier effect in nanowire solar cells and ultimately their efficiency by adjusting the dimensions and micro-structural properties of nanowires.
{"title":"Interplay of Electron Trapping by Defect Midgap State and Quantum Confinement to Optimize Hot Carrier Effect in a Nanowire Structure","authors":"Imam Makhfudz, Hamidreza Esmaielpour, Yaser Hajati, Gregor Koblmüller, Nicolas Cavassilas","doi":"arxiv-2409.11544","DOIUrl":"https://doi.org/arxiv-2409.11544","url":null,"abstract":"Hot carrier effect, a phenomenon where charge carriers generated by photon\u0000absorption remain energetic by not losing much energy, has been one of the\u0000leading strategies in increasing solar cell efficiency. Nanostructuring offers\u0000an effective approach to enhance hot carrier effect via the spatial\u0000confinement, as occurring in a nanowire structure. The recent experimental\u0000study by Esmaielpour et al. [ACS Applied Nano Materials 7, 2817 (2024)] reveals\u0000a fascinating non-monotonic dependence of the hot carrier effect in nanowire\u0000array on the diameter of the nanowire, contrary to what might be expected from\u0000quantum confinement alone. We show that this non-monotonic behavior can be\u0000explained by a simple model for electron energy loss that involves two\u0000principal mechanisms. First, electron-phonon scattering, that increases with\u0000nanowire diameter, leading to hot carrier effect that decreases with increasing\u0000diameter. Second, electron capture by a defect level within band gap, that is,\u0000a midgap state, that decreases with nanowire diameter, leading to hot carrier\u0000effect that increases with increasing diameter. The two mechanisms balance at a\u0000certain diameter corresponding to optimal hot carrier effect. Our result offers\u0000a guideline to optimize hot carrier effect in nanowire solar cells and\u0000ultimately their efficiency by adjusting the dimensions and micro-structural\u0000properties of nanowires.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"192 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We employ a ``real-time'' excitation scheme to calculate the excitation spectra of a two-dimensional electron system in a square array of quantum dots placed in a circular cylindrical far-infrared photon cavity subjected to a perpendicular homogeneous external magnetic field. The Coulomb interaction of the electrons is handled via spin density functional theory and the para- and the diamagnetic parts of the electron-photon coupling are updated according to a configuration interaction method in each iteration of the density functional calculation. The results show that an excitation scheme built on using the symmetry of the lateral square superlattice of the dots and the cylindrical cavity produces both para- and diamagnetic resonance peaks with oscillator strengths that can be steered by the excitation pulse parameters. The excitation method breaks the conditions for the generalized Kohn theorem and allows for insight into the subband structure of the electron system and can be used both in and outside the linear response regime.
{"title":"The tuning of para- and diamagnetic cavity photon excitations in a square array of quantum dots in a magnetic field","authors":"Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan, Jeng-Da Chai, Nzar Rauf Abdullah, Chi-Shung Tang, Valeriu Moldoveanu, Andrei Manolescu","doi":"arxiv-2409.09936","DOIUrl":"https://doi.org/arxiv-2409.09936","url":null,"abstract":"We employ a ``real-time'' excitation scheme to calculate the excitation\u0000spectra of a two-dimensional electron system in a square array of quantum dots\u0000placed in a circular cylindrical far-infrared photon cavity subjected to a\u0000perpendicular homogeneous external magnetic field. The Coulomb interaction of\u0000the electrons is handled via spin density functional theory and the para- and\u0000the diamagnetic parts of the electron-photon coupling are updated according to\u0000a configuration interaction method in each iteration of the density functional\u0000calculation. The results show that an excitation scheme built on using the\u0000symmetry of the lateral square superlattice of the dots and the cylindrical\u0000cavity produces both para- and diamagnetic resonance peaks with oscillator\u0000strengths that can be steered by the excitation pulse parameters. The\u0000excitation method breaks the conditions for the generalized Kohn theorem and\u0000allows for insight into the subband structure of the electron system and can be\u0000used both in and outside the linear response regime.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Single photon emitters (SPEs) are building blocks of quantum technologies. Defect engineering of 2D materials is ideal to fabricate SPEs, wherein spatially deterministic and quality-preserving fabrication methods are critical for integration into quantum devices and cavities. Existing methods use combination of strain and electron irradiation, or ion irradiation, which make fabrication complex, and limited by surrounding lattice damage. Here, we utilise only ultra-low energy electron beam irradiation (5 keV) to create dilute defect density in hBN-encapsulated monolayer MoS2, with ultra-high spatial resolution (< 50 nm, extendable to 10 nm). Cryogenic photoluminescence spectra exhibit sharp defect peaks, following power-law for finite density of single defects, and characteristic Zeeman splitting for MoS2 defect complexes. The sharp peaks have low spectral jitter (< 200 {mu}eV), and are tuneable with gate-voltage and electron beam energy. Use of low-momentum electron irradiation, ease of processing, and high spatial resolution, will disrupt deterministic creation of high-quality SPEs.
{"title":"Quantum light generation with ultra-high spatial resolution in 2D semiconductors via ultra-low energy electron irradiation","authors":"Ajit Kumar Dash, Sharad Kumar Yadav, Sebastien Roux, Manavendra Pratap Singh, Kenji Watanabe, Takashi Taniguchi, Akshay Naik, Cedric Robert, Xavier Marie, Akshay Singh","doi":"arxiv-2409.10321","DOIUrl":"https://doi.org/arxiv-2409.10321","url":null,"abstract":"Single photon emitters (SPEs) are building blocks of quantum technologies.\u0000Defect engineering of 2D materials is ideal to fabricate SPEs, wherein\u0000spatially deterministic and quality-preserving fabrication methods are critical\u0000for integration into quantum devices and cavities. Existing methods use\u0000combination of strain and electron irradiation, or ion irradiation, which make\u0000fabrication complex, and limited by surrounding lattice damage. Here, we\u0000utilise only ultra-low energy electron beam irradiation (5 keV) to create\u0000dilute defect density in hBN-encapsulated monolayer MoS2, with ultra-high\u0000spatial resolution (< 50 nm, extendable to 10 nm). Cryogenic photoluminescence\u0000spectra exhibit sharp defect peaks, following power-law for finite density of\u0000single defects, and characteristic Zeeman splitting for MoS2 defect complexes.\u0000The sharp peaks have low spectral jitter (< 200 {mu}eV), and are tuneable with\u0000gate-voltage and electron beam energy. Use of low-momentum electron\u0000irradiation, ease of processing, and high spatial resolution, will disrupt\u0000deterministic creation of high-quality SPEs.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"206 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on the correspondence between circuit Laplacian and Schrodinger equation, recent investigations have shown that classical electric circuits can be used to simulate various topological physics and the Schrodinger's equation. Furthermore, a series of quantum-inspired information processing have been implemented by using classical electric circuit networks. In this review, we begin by analyzing the similarity between circuit Laplacian and lattice Hamiltonian, introducing topological physics based on classical circuits. Subsequently, we provide reviews of the research progress in quantum-inspired information processing based on the electric circuit, including discussions of topological quantum computing with classical circuits, quantum walk based on classical circuits, quantum combinational logics based on classical circuits, electric-circuit realization of fast quantum search, implementing unitary transforms and so on.
{"title":"Engineering topological states and quantum-inspired information processing using classical circuits","authors":"Tian Chen, Weixuan Zhang, Deyuan Zou, Yifan Sun, Xiangdong Zhang","doi":"arxiv-2409.09919","DOIUrl":"https://doi.org/arxiv-2409.09919","url":null,"abstract":"Based on the correspondence between circuit Laplacian and Schrodinger\u0000equation, recent investigations have shown that classical electric circuits can\u0000be used to simulate various topological physics and the Schrodinger's equation.\u0000Furthermore, a series of quantum-inspired information processing have been\u0000implemented by using classical electric circuit networks. In this review, we\u0000begin by analyzing the similarity between circuit Laplacian and lattice\u0000Hamiltonian, introducing topological physics based on classical circuits.\u0000Subsequently, we provide reviews of the research progress in quantum-inspired\u0000information processing based on the electric circuit, including discussions of\u0000topological quantum computing with classical circuits, quantum walk based on\u0000classical circuits, quantum combinational logics based on classical circuits,\u0000electric-circuit realization of fast quantum search, implementing unitary\u0000transforms and so on.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magnetic damping induces the temporal and spatial decay of spin waves, characterized by the damping factor and attenuating length, both of which can be measured to determine various magnetic and spin-transport parameters. By investigating the dispersion and dissipation of inertial spin waves driven by spin-transfer torques, we find that magnetic inertia modifies the dependence of the damping factor and attenuating length on the electric current and spin wave frequency. This provides a valuable method for probing the inertial relaxation time.
{"title":"Temporal and spatial attenuation of inertial spin waves driven by spin-transfer torques","authors":"Peng-Bin He, Mikhail Cherkasskii","doi":"arxiv-2409.10457","DOIUrl":"https://doi.org/arxiv-2409.10457","url":null,"abstract":"Magnetic damping induces the temporal and spatial decay of spin waves,\u0000characterized by the damping factor and attenuating length, both of which can\u0000be measured to determine various magnetic and spin-transport parameters. By\u0000investigating the dispersion and dissipation of inertial spin waves driven by\u0000spin-transfer torques, we find that magnetic inertia modifies the dependence of\u0000the damping factor and attenuating length on the electric current and spin wave\u0000frequency. This provides a valuable method for probing the inertial relaxation\u0000time.","PeriodicalId":501137,"journal":{"name":"arXiv - PHYS - Mesoscale and Nanoscale Physics","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：