Pub Date : 2023-11-27DOI: 10.1088/0256-307X/40/12/127202
John Paul Strachan
{"title":"Unleashing the Power of Moiré Materials in Neuromorphic Computing","authors":"John Paul Strachan","doi":"10.1088/0256-307X/40/12/127202","DOIUrl":"https://doi.org/10.1088/0256-307X/40/12/127202","url":null,"abstract":"<jats:p />","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"45 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139233860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-25DOI: 10.1088/0256-307x/41/1/017801
Yupei Zhang, C. Mo, Ping Zhang, Wei Kang
We propose an ansatz without adjustable parameters for the calculation of dynamical structure factor. The ansatz combines quasi-particle Green’s function, especially the contribution from the renormalization factor, and the exchange-correlation kernel from time-dependent density functional theory together, verified for typical metals and semiconductors from plasmon excitation regime to Compton scattering regime. It has the capability to reconcile both small-angle and large-angle inelastic x-ray scattering (IXS) signals with much improved accuracy, which can be used, as the theoretical base model, in inversely inferring electronic structures of condensed matter from IXS experimental signals directly. It may also be used to diagnose thermal parameters, such as temperature and density, of dense plasmas in x-ray Thomson scattering experiments.
我们为动态结构因子的计算提出了一个无需调整参数的公式。该公式将准粒子格林函数（尤其是重正化因子的贡献）和时变密度泛函理论的交换相关核结合在一起，对典型金属和半导体从等离子体激发机制到康普顿散射机制进行了验证。它能够调和小角度和大角度非弹性 X 射线散射（IXS）信号，其精确度大大提高，可作为理论基础模型，直接从 IXS 实验信号反向推断凝聚态物质的电子结构。它还可用于诊断 X 射线汤姆逊散射实验中致密等离子体的热参数，如温度和密度。
{"title":"A composite ansatz for the calculation of dynamical structure factor","authors":"Yupei Zhang, C. Mo, Ping Zhang, Wei Kang","doi":"10.1088/0256-307x/41/1/017801","DOIUrl":"https://doi.org/10.1088/0256-307x/41/1/017801","url":null,"abstract":"We propose an ansatz without adjustable parameters for the calculation of dynamical structure factor. The ansatz combines quasi-particle Green’s function, especially the contribution from the renormalization factor, and the exchange-correlation kernel from time-dependent density functional theory together, verified for typical metals and semiconductors from plasmon excitation regime to Compton scattering regime. It has the capability to reconcile both small-angle and large-angle inelastic x-ray scattering (IXS) signals with much improved accuracy, which can be used, as the theoretical base model, in inversely inferring electronic structures of condensed matter from IXS experimental signals directly. It may also be used to diagnose thermal parameters, such as temperature and density, of dense plasmas in x-ray Thomson scattering experiments.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"23 16","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-24DOI: 10.1088/0256-307x/41/1/016301
Shi-Xian Liu, A. Barinov, Fei Yin, V. Khvesyuk
In this work, we estimate the thermal properties of unsmooth Si-nanowires, considering key factors such as size (diameter), surface texture (roughness), and quantum size effects (phonon states) at different temperatures. For nanowires with a diameter smaller than 20 nm, we highlight the importance of quantum size effects in heat capacity calculations, using dispersion relations derived from the modified frequency equation for the elasticity of rod. The thermal conductivities of nanowires with diameters of 37, 56, and 115 nm are predicted using the FuchsSondheimer model and Soffer’s specular parameter. Notably, the roughness parameters are chosen to reflect the technological characteristics of the real surfaces. Our findings reveal that surface texture plays a significant role in thermal conductivity, particularly in the realm of ballistic heat transfer within nanowires. This study provides practical recommendations for developing new thermal management materials.
{"title":"Determination of thermal properties of unsmooth Si-nanowires","authors":"Shi-Xian Liu, A. Barinov, Fei Yin, V. Khvesyuk","doi":"10.1088/0256-307x/41/1/016301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/1/016301","url":null,"abstract":"In this work, we estimate the thermal properties of unsmooth Si-nanowires, considering key factors such as size (diameter), surface texture (roughness), and quantum size effects (phonon states) at different temperatures. For nanowires with a diameter smaller than 20 nm, we highlight the importance of quantum size effects in heat capacity calculations, using dispersion relations derived from the modified frequency equation for the elasticity of rod. The thermal conductivities of nanowires with diameters of 37, 56, and 115 nm are predicted using the FuchsSondheimer model and Soffer’s specular parameter. Notably, the roughness parameters are chosen to reflect the technological characteristics of the real surfaces. Our findings reveal that surface texture plays a significant role in thermal conductivity, particularly in the realm of ballistic heat transfer within nanowires. This study provides practical recommendations for developing new thermal management materials.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"34 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139238829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-21DOI: 10.1088/0256-307x/41/1/013201
Jing Zhao, Jinlei Liu, Xiaowei Wang, Zengxiu Zhao
Quantum excitation used to be regarded as a transient process that takes no time and the behind physics remains mystery. Recent research shows that Rydberg-state excitation with ultrashort laser pulses can be investigated and manipulated with the state-of-the-art few-cycle pulses. In this work, we found theoretically that the Rydberg state excitation probability is more efficient with short laser pulse, and modulated by varying the laser intensities. We uncover a new facet of the excitation dynamics: the launching of electron wave packet through strong-field ionization, the reentry of the electron into the atomic potential, and the crucial step that the electron makes a U-turn leading to twin captures into Rydberg orbitals. By tuning the laser intensity, we show the excitation of Rydberg state can be coherently controlled in sub-optical-cycle time scale. Our work paves the way toward ultrafast control and coherent manipulation of Rydberg states, thus benefits Rydberg-state-based quantum technology.
{"title":"Twin capture Rydberg state excitation enhanced with few-cycle laser pulses","authors":"Jing Zhao, Jinlei Liu, Xiaowei Wang, Zengxiu Zhao","doi":"10.1088/0256-307x/41/1/013201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/1/013201","url":null,"abstract":"Quantum excitation used to be regarded as a transient process that takes no time and the behind physics remains mystery. Recent research shows that Rydberg-state excitation with ultrashort laser pulses can be investigated and manipulated with the state-of-the-art few-cycle pulses. In this work, we found theoretically that the Rydberg state excitation probability is more efficient with short laser pulse, and modulated by varying the laser intensities. We uncover a new facet of the excitation dynamics: the launching of electron wave packet through strong-field ionization, the reentry of the electron into the atomic potential, and the crucial step that the electron makes a U-turn leading to twin captures into Rydberg orbitals. By tuning the laser intensity, we show the excitation of Rydberg state can be coherently controlled in sub-optical-cycle time scale. Our work paves the way toward ultrafast control and coherent manipulation of Rydberg states, thus benefits Rydberg-state-based quantum technology.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"17 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139251627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-14DOI: 10.1088/0256-307x/40/12/127401
Yang Shen, Mingpu Qin, Guang-Ming Zhang
Abstract High-Tc superconductivity with possible $T_{c}approx 80K$ has been reported in the single crystal of $text{La}_{3}text{Ni}_{2}text{O}_{7}$ under high pressure. Based on the electronic structure given from the density functional theory calculations, we propose an effective bi-layer model Hamiltonian including both $3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbital electrons of the nickel cations. The main feature of the model is that the $% 3d_{z^{2}}$ electrons form inter-layer $sigma$-bonding and anti-bonding bands via the apical oxygen anions between the two layers, while the $% 3d_{x^{2}-y^{2}}$ electrons hybridize with the $3d_{z^{2}}$ electrons within each NiO$_2$ plane. The chemical potential difference of these two orbital electrons ensures that the $3d_{z^{2}}$ orbitals are close to half-filling and the $3d_{x^{2}-y^{2}}$ orbitals are near quarter-filling. The strong on-site Hubbard repulsion of the $3d_{z^{2}}$ orbital electrons gives rise to an effective inter-layer antiferromagnetic spin super-exchange $J$. Applying pressure can self-dope holes on the $3d_{z^{2}}$ orbitals with the same amount of electrons doped on the $3d_{x^{2}-y^{2}}$ orbitals. By performing numerical density-matrix renormalization group calculations on a minimum setup and focusing on the limit of large $J$ and small doping of $% 3d_{z^{2}}$ orbitals, we find the superconducting instability on both the $% 3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbitals by calculating the equal-time spin singlet pair-pair correlation function. Our numerical results have provided useful insights in the high-Tc superconductivity in single crystal La$_3$Ni$_2$O$_7$ under high pressure.
{"title":"Effective bi-layer model Hamiltonian and density-matrix renormalization group study for the high-Tc superconductivity in La<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub> under high pressure","authors":"Yang Shen, Mingpu Qin, Guang-Ming Zhang","doi":"10.1088/0256-307x/40/12/127401","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/127401","url":null,"abstract":"Abstract High-Tc superconductivity with possible $T_{c}approx 80K$ has been reported in the single crystal of $text{La}_{3}text{Ni}_{2}text{O}_{7}$ under high pressure. Based on the electronic structure given from the density functional theory calculations, we propose an effective bi-layer model Hamiltonian including both $3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbital electrons of the nickel cations. The main feature of the model is that the $% 3d_{z^{2}}$ electrons form inter-layer $sigma$-bonding and anti-bonding bands via the apical oxygen anions between the two layers, while the $% 3d_{x^{2}-y^{2}}$ electrons hybridize with the $3d_{z^{2}}$ electrons within each NiO$_2$ plane. The chemical potential difference of these two orbital electrons ensures that the $3d_{z^{2}}$ orbitals are close to half-filling and the $3d_{x^{2}-y^{2}}$ orbitals are near quarter-filling. The strong on-site Hubbard repulsion of the $3d_{z^{2}}$ orbital electrons gives rise to an effective inter-layer antiferromagnetic spin super-exchange $J$. Applying pressure can self-dope holes on the $3d_{z^{2}}$ orbitals with the same amount of electrons doped on the $3d_{x^{2}-y^{2}}$ orbitals. By performing numerical density-matrix renormalization group calculations on a minimum setup and focusing on the limit of large $J$ and small doping of $% 3d_{z^{2}}$ orbitals, we find the superconducting instability on both the $% 3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbitals by calculating the equal-time spin singlet pair-pair correlation function. Our numerical results have provided useful insights in the high-Tc superconductivity in single crystal La$_3$Ni$_2$O$_7$ under high pressure.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"36 27","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-10DOI: 10.1088/0256-307x/40/12/128701
Yikai Ma, Wei Chen
Abstract The behavior of cell movement is one of the most interesting biological problems in biology, physics and medicine. In this study, we conducted experiments to investigate the characteristics of random cell motion during migration. By observing cell motion trajectories under a microscope, we employed nonlinear dynamics method to construct a speed- acceleration phase diagram. Our analysis revealed the presence of a fixed point in this phase diagram, which suggests that migrating cells possess a stable state. Cells that deviate from this stable state display a tendency to return to it, following the streamline trends of an attractor structure in the phase diagram. We derived a set of characteristic values describing cell motion, encompassing inherent speed, inherent acceleration, characteristic time for speed change, and characteristic time for acceleration change. We developed a differential equation model based on experimental data and conducted numerical calculations. The computational results align with the findings obtained from experimental results. Our research suggests that the asymmetrical characteristics observed in cell motion near an inherent speed primarily arise from the characteristics of inherent acceleration of cells.
{"title":"Characteristics of the Speed- Acceleration Phase Diagram of Migrating Cells","authors":"Yikai Ma, Wei Chen","doi":"10.1088/0256-307x/40/12/128701","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/128701","url":null,"abstract":"Abstract The behavior of cell movement is one of the most interesting biological problems in biology, physics and medicine. In this study, we conducted experiments to investigate the characteristics of random cell motion during migration. By observing cell motion trajectories under a microscope, we employed nonlinear dynamics method to construct a speed- acceleration phase diagram. Our analysis revealed the presence of a fixed point in this phase diagram, which suggests that migrating cells possess a stable state. Cells that deviate from this stable state display a tendency to return to it, following the streamline trends of an attractor structure in the phase diagram. We derived a set of characteristic values describing cell motion, encompassing inherent speed, inherent acceleration, characteristic time for speed change, and characteristic time for acceleration change. We developed a differential equation model based on experimental data and conducted numerical calculations. The computational results align with the findings obtained from experimental results. Our research suggests that the asymmetrical characteristics observed in cell motion near an inherent speed primarily arise from the characteristics of inherent acceleration of cells.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"107 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135137983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The discovery of high-temperature superconductivity near 80 K in bilayer nickelate La3Ni2O7 under high pressures has renewed the exploration of superconducting nickelate in bulk materials. The extension of superconductivity in other nickelates in a broader family is also essential. Here, we report the experimental observation of superconducting signature in trilayer nickelate La4Ni3O10 under high pressures. By using a modified sol-gel method and post-annealing treatment under high oxygen pressure, we successfully obtained polycrystalline La4Ni3O10 samples with different transport behaviors at ambient pressure. Then we performed high-pressure electrical resistance measurements on these samples in a diamond-anvil-cell (DAC) apparatus. Surprisingly, the signature of possible superconducting transition with a maximum transition temperature (T c) of about 20 K under high pressures is observed, as evidenced by a clear drop of resistance and the suppression of resistance drops under magnetic fields. Although the resistance drop is sample-dependent and relatively small, it appears in all of our measured samples. We argue that the observed superconducting signal is most likely to originate from the main phase of La4Ni3O10. Our findings will motivate the exploration of superconductivity in a broader family of nickelates and shed light on the understanding of the underlying mechanisms of high-T c superconductivity in nickelates.
双层镍酸盐 La3Ni2O7 在高压下具有接近 80 K 的高温超导电性，这一发现再次推动了对块状材料中超导镍酸盐的探索。在更广泛的镍酸盐家族中扩展超导性也是至关重要的。在此，我们报告了在高压下对三层镍酸盐 La4Ni3O10 超导特征的实验观察。通过改良的溶胶-凝胶法和高氧压下的后退火处理，我们成功地获得了在常压下具有不同输运行为的多晶 La4Ni3O10 样品。然后，我们在金刚石-紫外电池（DAC）装置中对这些样品进行了高压电阻测量。令人惊讶的是，我们观察到了高压下最大转变温度（T c）约为 20 K 的可能超导转变特征，这表现在电阻的明显下降和磁场下电阻下降的抑制。虽然电阻下降与样品有关，而且相对较小，但在我们测量的所有样品中都出现了这种现象。我们认为，观察到的超导信号很可能来自 La4Ni3O10 的主相。我们的研究结果将推动对更广泛的镍酸盐家族的超导性的探索，并有助于理解镍酸盐中高 T c 超导性的基本机制。
{"title":"Signature of superconductivity in pressurized La4Ni3O10","authors":"Qing Li, Ying-Jie Zhang, Zhe-Ning Xiang, Yuhang Zhang, Xiyu Zhu, Hai-Hu Wen","doi":"10.1088/0256-307x/41/1/017401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/1/017401","url":null,"abstract":"The discovery of high-temperature superconductivity near 80 K in bilayer nickelate La3Ni2O7 under high pressures has renewed the exploration of superconducting nickelate in bulk materials. The extension of superconductivity in other nickelates in a broader family is also essential. Here, we report the experimental observation of superconducting signature in trilayer nickelate La4Ni3O10 under high pressures. By using a modified sol-gel method and post-annealing treatment under high oxygen pressure, we successfully obtained polycrystalline La4Ni3O10 samples with different transport behaviors at ambient pressure. Then we performed high-pressure electrical resistance measurements on these samples in a diamond-anvil-cell (DAC) apparatus. Surprisingly, the signature of possible superconducting transition with a maximum transition temperature (T c) of about 20 K under high pressures is observed, as evidenced by a clear drop of resistance and the suppression of resistance drops under magnetic fields. Although the resistance drop is sample-dependent and relatively small, it appears in all of our measured samples. We argue that the observed superconducting signal is most likely to originate from the main phase of La4Ni3O10. Our findings will motivate the exploration of superconductivity in a broader family of nickelates and shed light on the understanding of the underlying mechanisms of high-T c superconductivity in nickelates.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"55 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139282199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-09DOI: 10.1088/0256-307x/40/12/122101
Yu-Gang Ma, Long-Gang Pang, Rui Wang, Kai Zhou
In recent years, machine learning (ML) techniques have emerged as powerful tools in studying many-body complex systems, encompassing phase transitions in various domains of physics. This mini-review provides a concise yet comprehensive examination of the advancements achieved in applying ML for investigating phase transitions, with a primary emphasis on those involved in nuclear matter studies.
{"title":"Phase Transition Study meets Machine Learning","authors":"Yu-Gang Ma, Long-Gang Pang, Rui Wang, Kai Zhou","doi":"10.1088/0256-307x/40/12/122101","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/122101","url":null,"abstract":"In recent years, machine learning (ML) techniques have emerged as powerful tools in studying many-body complex systems, encompassing phase transitions in various domains of physics. This mini-review provides a concise yet comprehensive examination of the advancements achieved in applying ML for investigating phase transitions, with a primary emphasis on those involved in nuclear matter studies.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":" 46","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The quantum spin liquid (QSL) state has been searched intensively in Kitaev-like materials, such as the Iridium oxides A 2 IrO 3 and α -RuCl 3 . The half-filled Kitaev-Hubbard model with bond dependent hopping terms is used to describe the Kitaev-like materials, which is calculated using the state-of-the-art fermionic projected entangled pair states (fPEPS) method. We find a QSL phase near the Mott insulator transition, which has a strong first-order transition to the semi-metal phase with the decrease of Hubbard U . We suggest that a promising routine to find the QSL is to find the Iridium oxides that are near the Mott insulator transitions.
{"title":"A possible quantum spin liquid phase in the Kitaev-Hubbard model","authors":"Shaojun Dong, Hao Zhang, Chao Wang, Meng Zhang, Yong-Jian Han, Lixin He","doi":"10.1088/0256-307x/40/12/126403","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/126403","url":null,"abstract":"Abstract The quantum spin liquid (QSL) state has been searched intensively in Kitaev-like materials, such as the Iridium oxides A 2 IrO 3 and α -RuCl 3 . The half-filled Kitaev-Hubbard model with bond dependent hopping terms is used to describe the Kitaev-like materials, which is calculated using the state-of-the-art fermionic projected entangled pair states (fPEPS) method. We find a QSL phase near the Mott insulator transition, which has a strong first-order transition to the semi-metal phase with the decrease of Hubbard U . We suggest that a promising routine to find the QSL is to find the Iridium oxides that are near the Mott insulator transitions.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":" 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-08DOI: 10.1088/0256-307x/40/12/126402
Rui Liu, Jianxiao Gong, Mingcheng Yang, Ke Chen
Abstract An active system consisting of many self-spinning dimers is simulated, and a distinct local rotational jamming transition is observed as the density increases. In the low density regime, the system stays in an absorbing state, in which each dimer rotates independently subject to the applied torque. While in the high density regime, a fraction of the dimers become rotationally jammed into local clusters, and the system exhibits microphase-separation like two-phase morphologies. For high enough densities, the system becomes completely jammed in both rotational and translational degrees of freedom. Such a simple system is found to exhibit rich and multiscale disordered hyperuniformities among the above phases: the absorbing state shows a critical hyperuniformity of the strongest class and subcritically preserves the vanishing density-fluctuation scaling up to some length scale; the locally-jammed state shows a two-phase hyperuniformity conversely beyond some length scale with respect to the phase cluster sizes; the totally jammed state appears to be a monomer crystal, but intrinsically loses large-scale hyperuniformity. These results are inspiring for designing novel phase-separation and disordered hyperuniform systems through dynamical organization.
{"title":"Local Rotational Jamming and Multi-Stage Hyperuniformities in an Active Spinner System","authors":"Rui Liu, Jianxiao Gong, Mingcheng Yang, Ke Chen","doi":"10.1088/0256-307x/40/12/126402","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/126402","url":null,"abstract":"Abstract An active system consisting of many self-spinning dimers is simulated, and a distinct local rotational jamming transition is observed as the density increases. In the low density regime, the system stays in an absorbing state, in which each dimer rotates independently subject to the applied torque. While in the high density regime, a fraction of the dimers become rotationally jammed into local clusters, and the system exhibits microphase-separation like two-phase morphologies. For high enough densities, the system becomes completely jammed in both rotational and translational degrees of freedom. Such a simple system is found to exhibit rich and multiscale disordered hyperuniformities among the above phases: the absorbing state shows a critical hyperuniformity of the strongest class and subcritically preserves the vanishing density-fluctuation scaling up to some length scale; the locally-jammed state shows a two-phase hyperuniformity conversely beyond some length scale with respect to the phase cluster sizes; the totally jammed state appears to be a monomer crystal, but intrinsically loses large-scale hyperuniformity. These results are inspiring for designing novel phase-separation and disordered hyperuniform systems through dynamical organization.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"54 S267","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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