Pub Date : 2026-01-21DOI: 10.1038/s41567-025-03134-x
Yoji Nabei, Cong Yang, Hong Sun, Hana Jones, Thuc Mai, Tian Wang, Rikard Bodin, Binod Pandey, Ziqi Wang, Yuzan Xiong, Andrew H. Comstock, Benjamin Ewing, John Bingen, Rui Sun, Dmitry Smirnov, Wei Zhang, Axel Hoffmann, Rahul Rao, Ming Hu, Z. Valy Vardeny, Binghai Yan, Xiaosong Li, Jun Zhou, Jun Liu, Dali Sun
The orbital angular momentum of electrons presents exciting opportunities for developing energy-efficient, low-power magnetic devices. Typically, the generation of orbital currents is driven by the transfer of orbital angular momentum from 3d transition metal magnets, either through the application of an electric field using the orbital Hall effect or through magnetization dynamics. Chiral phonons are quantized lattice vibrations that carry non-zero angular momentum due to the circular motion of atoms. An interplay of chiral phonon dynamics and electrons would enable the direct generation of orbital angular momentum, even without the need for magnetic elements. Here we experimentally demonstrate the generation of orbital currents from chiral phonons activated in the chiral insulator α-quartz under an applied magnetic field and a temperature gradient. We refer to this phenomenon as the orbital Seebeck effect. The generated orbital current is selectively detected in tungsten and titanium films deposited on quartz through the inverse orbital Hall effect. Our findings hold promise for orbitronics based on chiral phonons in non-magnetic insulators and shed light on the fundamental understanding of chiral phonons and their interaction with electron orbitals.
{"title":"Orbital Seebeck effect induced by chiral phonons","authors":"Yoji Nabei, Cong Yang, Hong Sun, Hana Jones, Thuc Mai, Tian Wang, Rikard Bodin, Binod Pandey, Ziqi Wang, Yuzan Xiong, Andrew H. Comstock, Benjamin Ewing, John Bingen, Rui Sun, Dmitry Smirnov, Wei Zhang, Axel Hoffmann, Rahul Rao, Ming Hu, Z. Valy Vardeny, Binghai Yan, Xiaosong Li, Jun Zhou, Jun Liu, Dali Sun","doi":"10.1038/s41567-025-03134-x","DOIUrl":"https://doi.org/10.1038/s41567-025-03134-x","url":null,"abstract":"The orbital angular momentum of electrons presents exciting opportunities for developing energy-efficient, low-power magnetic devices. Typically, the generation of orbital currents is driven by the transfer of orbital angular momentum from 3d transition metal magnets, either through the application of an electric field using the orbital Hall effect or through magnetization dynamics. Chiral phonons are quantized lattice vibrations that carry non-zero angular momentum due to the circular motion of atoms. An interplay of chiral phonon dynamics and electrons would enable the direct generation of orbital angular momentum, even without the need for magnetic elements. Here we experimentally demonstrate the generation of orbital currents from chiral phonons activated in the chiral insulator α-quartz under an applied magnetic field and a temperature gradient. We refer to this phenomenon as the orbital Seebeck effect. The generated orbital current is selectively detected in tungsten and titanium films deposited on quartz through the inverse orbital Hall effect. Our findings hold promise for orbitronics based on chiral phonons in non-magnetic insulators and shed light on the fundamental understanding of chiral phonons and their interaction with electron orbitals.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"45 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-21DOI: 10.1038/s41567-025-03139-6
Takashi Kikkawa
{"title":"Orbital current from phonons","authors":"Takashi Kikkawa","doi":"10.1038/s41567-025-03139-6","DOIUrl":"https://doi.org/10.1038/s41567-025-03139-6","url":null,"abstract":"","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"33 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146032994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 supermoiré lattice, arising from the interference of multiple moiré patterns, reshapes the electronic band structure of the material that hosts it by introducing new mini bands and modifying the band dispersion. Concurrently, strong electronic interactions within the flat bands induced by the moiré pattern lead to the emergence of various correlated states. However, the impact of the supermoiré lattice on the flat band system with strong interactions remains largely unexplored. Here we report the existence of the supermoiré lattice in twisted trilayer graphene with broken mirror symmetry and elucidate its role in generating mini flat bands and mini Dirac bands. We demonstrate interaction-induced symmetry-broken phases in the supermoiré mini flat bands alongside a cascade of superconductor–insulator transitions enabled by the supermoiré lattice. Our work shows that robust superconductivity can exist in twisted trilayer graphene with broken mirror symmetry and underscores the importance of the supermoiré lattice as an additional degree of freedom for tuning the electronic properties in twisted multilayer systems. It also sheds light on the correlated quantum phases such as superconductivity in the original moiré flat bands, and highlights the potential of using the supermoiré lattice to design and simulate quantum phases.
{"title":"Strong correlations and superconductivity in the supermoiré lattice","authors":"Zekang Zhou, Cheng Shen, Kryštof Kolár^, Kenji Watanabe, Takashi Taniguchi, Cyprian Lewandowski, Mitali Banerjee","doi":"10.1038/s41567-025-03131-0","DOIUrl":"https://doi.org/10.1038/s41567-025-03131-0","url":null,"abstract":"The supermoiré lattice, arising from the interference of multiple moiré patterns, reshapes the electronic band structure of the material that hosts it by introducing new mini bands and modifying the band dispersion. Concurrently, strong electronic interactions within the flat bands induced by the moiré pattern lead to the emergence of various correlated states. However, the impact of the supermoiré lattice on the flat band system with strong interactions remains largely unexplored. Here we report the existence of the supermoiré lattice in twisted trilayer graphene with broken mirror symmetry and elucidate its role in generating mini flat bands and mini Dirac bands. We demonstrate interaction-induced symmetry-broken phases in the supermoiré mini flat bands alongside a cascade of superconductor–insulator transitions enabled by the supermoiré lattice. Our work shows that robust superconductivity can exist in twisted trilayer graphene with broken mirror symmetry and underscores the importance of the supermoiré lattice as an additional degree of freedom for tuning the electronic properties in twisted multilayer systems. It also sheds light on the correlated quantum phases such as superconductivity in the original moiré flat bands, and highlights the potential of using the supermoiré lattice to design and simulate quantum phases.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"31 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-20DOI: 10.1038/s41567-025-03144-9
Laurin E. Fischer, Matea Leahy, Andrew Eddins, Nathan Keenan, Davide Ferracin, Matteo A. C. Rossi, Youngseok Kim, Andre He, Francesca Pietracaprina, Boris Sokolov, Shane Dooley, Zoltán Zimborás, Francesco Tacchino, Sabrina Maniscalco, John Goold, Guillermo García-Pérez, Ivano Tavernelli, Abhinav Kandala, Sergey N. Filippov
Quantum circuits with local unitaries offer a platform to explore many-body quantum dynamics in discrete time. Their locality makes them suitable for current processors, but verification at scale is difficult for non-integrable systems. Here we study dual-unitary circuits, which are maximally chaotic yet permit exact analytical solutions for certain correlation functions. Using improved noise-learning and error-mitigation methods, we show that a superconducting quantum processor with 91 qubits is able to accurately simulate these correlators. We then perturb the circuits away from the dual-unitary point and benchmark the dynamics against tensor-network simulations. These results establish error-mitigated digital quantum simulation on pre-fault-tolerant processors as a reliable tool to explore emergent quantum many-body phases.
{"title":"Dynamical simulations of many-body quantum chaos on a quantum computer","authors":"Laurin E. Fischer, Matea Leahy, Andrew Eddins, Nathan Keenan, Davide Ferracin, Matteo A. C. Rossi, Youngseok Kim, Andre He, Francesca Pietracaprina, Boris Sokolov, Shane Dooley, Zoltán Zimborás, Francesco Tacchino, Sabrina Maniscalco, John Goold, Guillermo García-Pérez, Ivano Tavernelli, Abhinav Kandala, Sergey N. Filippov","doi":"10.1038/s41567-025-03144-9","DOIUrl":"https://doi.org/10.1038/s41567-025-03144-9","url":null,"abstract":"Quantum circuits with local unitaries offer a platform to explore many-body quantum dynamics in discrete time. Their locality makes them suitable for current processors, but verification at scale is difficult for non-integrable systems. Here we study dual-unitary circuits, which are maximally chaotic yet permit exact analytical solutions for certain correlation functions. Using improved noise-learning and error-mitigation methods, we show that a superconducting quantum processor with 91 qubits is able to accurately simulate these correlators. We then perturb the circuits away from the dual-unitary point and benchmark the dynamics against tensor-network simulations. These results establish error-mitigated digital quantum simulation on pre-fault-tolerant processors as a reliable tool to explore emergent quantum many-body phases.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"31 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-19DOI: 10.1038/s41567-025-03132-z
Vivek Pareek, David R. Bacon, Xing Zhu, Yang-Hao Chan, Fabio Bussolotti, Marcos G. Menezes, Nicholas S. Chan, Joel Pérez Urquizo, Kenji Watanabe, Takashi Taniguchi, Enrico Perfetto, Michael K. L. Man, Julien Madéo, Gianluca Stefanucci, Diana Y. Qiu, Kuan Eng Johnson Goh, Felipe H. da Jornada, Keshav M. Dani
Floquet engineering, in which an intense optical field modifies the electronic structure of a material, offers a route to the control of quantum and topological properties. However, it is challenging to realize this in experiments due to relatively weak light–matter coupling and the dominance of detrimental effects, such as multi-photon absorption and sample heating. Here we use time- and angle-resolved photoemission spectroscopy to show that in a monolayer semiconductor, Floquet effects caused by an excitonic field—the time-periodic oscillations of the self-energy of an electron bound to a hole—are two orders of magnitude stronger and persist longer than optically driven counterparts. Our measurements directly capture the hybridization between the exciton-dressed conduction band and the valence band in two-dimensional semiconductors, in agreement with first-principles calculations. The onset of this hybridization with increasing exciton density also correlates with the Bose–Einstein condensation to Bardeen–Cooper–Schrieffer crossover, extensively discussed in theory for non-equilibrium excitonic insulators. These results establish exciton-driven Floquet engineering as a means for studying correlated electronic phases.
{"title":"Driving Floquet physics with excitonic fields","authors":"Vivek Pareek, David R. Bacon, Xing Zhu, Yang-Hao Chan, Fabio Bussolotti, Marcos G. Menezes, Nicholas S. Chan, Joel Pérez Urquizo, Kenji Watanabe, Takashi Taniguchi, Enrico Perfetto, Michael K. L. Man, Julien Madéo, Gianluca Stefanucci, Diana Y. Qiu, Kuan Eng Johnson Goh, Felipe H. da Jornada, Keshav M. Dani","doi":"10.1038/s41567-025-03132-z","DOIUrl":"https://doi.org/10.1038/s41567-025-03132-z","url":null,"abstract":"Floquet engineering, in which an intense optical field modifies the electronic structure of a material, offers a route to the control of quantum and topological properties. However, it is challenging to realize this in experiments due to relatively weak light–matter coupling and the dominance of detrimental effects, such as multi-photon absorption and sample heating. Here we use time- and angle-resolved photoemission spectroscopy to show that in a monolayer semiconductor, Floquet effects caused by an excitonic field—the time-periodic oscillations of the self-energy of an electron bound to a hole—are two orders of magnitude stronger and persist longer than optically driven counterparts. Our measurements directly capture the hybridization between the exciton-dressed conduction band and the valence band in two-dimensional semiconductors, in agreement with first-principles calculations. The onset of this hybridization with increasing exciton density also correlates with the Bose–Einstein condensation to Bardeen–Cooper–Schrieffer crossover, extensively discussed in theory for non-equilibrium excitonic insulators. These results establish exciton-driven Floquet engineering as a means for studying correlated electronic phases.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"276 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-16DOI: 10.1038/s41567-025-03146-7
Junho Seo, Chunyu Mark Guo, Carsten Putzke, Xiangwei Huang, Berit H. Goodge, Yip Chun Wong, Mark H. Fischer, Titus Neupert, Philip J. W. Moll
Strong magnetic fields applied to metals confine electrons into Landau orbits, except at the boundaries at which frequent surface collisions disrupt their cyclotron motion. In two-dimensional systems, these boundary states form dissipationless chiral edge channels in the quantum Hall regime. By contrast, the quantum limit of three-dimensional (3D) metals is traditionally thought to differ fundamentally and instead contains gapless Landau bands, lacking quantized Hall conductance or dissipationless transport. Here we demonstrate enhanced surface conduction in the quantum limit of the 3D semimetal bismuth, characterized by the counterintuitive increase in conductivity as material is removed by micropatterning. The conductance of the 3D chiral boundary states—3D analogues of quantum Hall states in two dimensions—naturally accounts for this behaviour and for the highly non-local transport observed in micrometre-sized crystalline bismuth structures. These findings introduce an approach for engineering and exploiting chiral conduction on the surfaces of 3D materials, offering a design space for geometries beyond the simple one-dimensional boundary modes of two-dimensional systems.
{"title":"Transport evidence for chiral surface states from three-dimensional Landau bands","authors":"Junho Seo, Chunyu Mark Guo, Carsten Putzke, Xiangwei Huang, Berit H. Goodge, Yip Chun Wong, Mark H. Fischer, Titus Neupert, Philip J. W. Moll","doi":"10.1038/s41567-025-03146-7","DOIUrl":"https://doi.org/10.1038/s41567-025-03146-7","url":null,"abstract":"Strong magnetic fields applied to metals confine electrons into Landau orbits, except at the boundaries at which frequent surface collisions disrupt their cyclotron motion. In two-dimensional systems, these boundary states form dissipationless chiral edge channels in the quantum Hall regime. By contrast, the quantum limit of three-dimensional (3D) metals is traditionally thought to differ fundamentally and instead contains gapless Landau bands, lacking quantized Hall conductance or dissipationless transport. Here we demonstrate enhanced surface conduction in the quantum limit of the 3D semimetal bismuth, characterized by the counterintuitive increase in conductivity as material is removed by micropatterning. The conductance of the 3D chiral boundary states—3D analogues of quantum Hall states in two dimensions—naturally accounts for this behaviour and for the highly non-local transport observed in micrometre-sized crystalline bismuth structures. These findings introduce an approach for engineering and exploiting chiral conduction on the surfaces of 3D materials, offering a design space for geometries beyond the simple one-dimensional boundary modes of two-dimensional systems.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"101 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-16DOI: 10.1038/s41567-025-03140-z
Patrick Laermann, Haim Diamant, Yael Roichman, Ivo Buttinoni, Manuel A. Escobedo-Sánchez, Stefan U. Egelhaaf
At the glass transition, a liquid transforms into an amorphous solid. Despite minimal structural rearrangements, this transition is accompanied by a dramatic dynamical slowdown. These features render the transition’s experimental determination and theoretical understanding challenging. Here we introduce a new framework that uses two-particle correlations and a model-free theoretical description to investigate the dynamics of glass-forming colloidal suspensions indirectly. Using the fluctuation-dissipation theorem, we relate equilibrium thermal fluctuations of pairs of tracer particles to the underlying response properties of the system. We measure the correlated motion of tracer particles caused by the solvent at short timescales and find three distinct signatures signalling the onset of the glass transition. The correlations in the thermal motions of tracer pairs exhibit a changing decay behaviour with their relative distance; a length scale related to this decay steeply increases; and a notable sign reversal is observed in specific correlations. Our findings establish a connection between the colloidal glass transition and the breaking of the translational symmetry in the dispersion medium, thereby revealing fundamental aspects of the glass transitions.
{"title":"Emergent signatures of the glass transition in colloidal suspensions","authors":"Patrick Laermann, Haim Diamant, Yael Roichman, Ivo Buttinoni, Manuel A. Escobedo-Sánchez, Stefan U. Egelhaaf","doi":"10.1038/s41567-025-03140-z","DOIUrl":"https://doi.org/10.1038/s41567-025-03140-z","url":null,"abstract":"At the glass transition, a liquid transforms into an amorphous solid. Despite minimal structural rearrangements, this transition is accompanied by a dramatic dynamical slowdown. These features render the transition’s experimental determination and theoretical understanding challenging. Here we introduce a new framework that uses two-particle correlations and a model-free theoretical description to investigate the dynamics of glass-forming colloidal suspensions indirectly. Using the fluctuation-dissipation theorem, we relate equilibrium thermal fluctuations of pairs of tracer particles to the underlying response properties of the system. We measure the correlated motion of tracer particles caused by the solvent at short timescales and find three distinct signatures signalling the onset of the glass transition. The correlations in the thermal motions of tracer pairs exhibit a changing decay behaviour with their relative distance; a length scale related to this decay steeply increases; and a notable sign reversal is observed in specific correlations. Our findings establish a connection between the colloidal glass transition and the breaking of the translational symmetry in the dispersion medium, thereby revealing fundamental aspects of the glass transitions.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"269 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-15DOI: 10.1038/s41567-025-03149-4
A recently proposed class of magnets, so-called altermagnets, combine features of ferromagnets and antiferromagnets. We discuss the scientific appeal of altermagnets, current controversies and challenges for their practical use.
{"title":"An alternate chapter in magnetism","authors":"","doi":"10.1038/s41567-025-03149-4","DOIUrl":"10.1038/s41567-025-03149-4","url":null,"abstract":"A recently proposed class of magnets, so-called altermagnets, combine features of ferromagnets and antiferromagnets. We discuss the scientific appeal of altermagnets, current controversies and challenges for their practical use.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"22 1","pages":"1-1"},"PeriodicalIF":18.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41567-025-03149-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145984093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1038/s41567-025-03151-w
Mark Buchanan
{"title":"A star of contradictions","authors":"Mark Buchanan","doi":"10.1038/s41567-025-03151-w","DOIUrl":"10.1038/s41567-025-03151-w","url":null,"abstract":"","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"22 1","pages":"5-5"},"PeriodicalIF":18.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145984098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2026-01-15DOI: 10.1038/s41567-025-03124-z
Rinsuke Yamada, Daichi Kurebayashi, Yukako Fujishiro, Shun Okumura, Daisuke Nakamura, Fehmi S. Yasin, Taro Nakajima, Tomoyuki Yokouchi, Akiko Kikkawa, Yasujiro Taguchi, Yoshinori Tokura, Oleg A. Tretiakov, Max Hirschberger
The dynamic motion of topological defects in magnets induces an emergent electric field, as exemplified by the continuous flow of skyrmion vortices. However, the electrodynamics underlying this emergent field remains poorly understood. In this context, magnetic domain walls—one-dimensional topological defects with two collective modes, sliding and spin-tilt—offer a promising platform for exploration. Here we demonstrate that the dissipative motion of domain walls under oscillatory current excitation generates an emergent electric field. We image domain patterns and quantify the domain-wall length under applied magnetic fields in mesoscopic devices based on the magnetic Weyl semimetal NdAlSi. These devices exhibit exceptionally strong domain-wall scattering and a pronounced emergent electric field, as observed in the imaginary component of the complex impedance. Spin dynamics simulations reveal that domain-wall sliding dominates over spin-tilting, in which the phase delay of the domain-wall motion with respect to the driving force impacts the emergent electric field. Our findings establish domain-wall dynamics as a platform for studying emergent electromagnetic fields and motivate further investigations of the coupled motion of magnetic solitons and conduction electrons.
{"title":"Emergent electric field induced by dissipative sliding dynamics of domain walls in a Weyl magnet","authors":"Rinsuke Yamada, Daichi Kurebayashi, Yukako Fujishiro, Shun Okumura, Daisuke Nakamura, Fehmi S. Yasin, Taro Nakajima, Tomoyuki Yokouchi, Akiko Kikkawa, Yasujiro Taguchi, Yoshinori Tokura, Oleg A. Tretiakov, Max Hirschberger","doi":"10.1038/s41567-025-03124-z","DOIUrl":"https://doi.org/10.1038/s41567-025-03124-z","url":null,"abstract":"The dynamic motion of topological defects in magnets induces an emergent electric field, as exemplified by the continuous flow of skyrmion vortices. However, the electrodynamics underlying this emergent field remains poorly understood. In this context, magnetic domain walls—one-dimensional topological defects with two collective modes, sliding and spin-tilt—offer a promising platform for exploration. Here we demonstrate that the dissipative motion of domain walls under oscillatory current excitation generates an emergent electric field. We image domain patterns and quantify the domain-wall length under applied magnetic fields in mesoscopic devices based on the magnetic Weyl semimetal NdAlSi. These devices exhibit exceptionally strong domain-wall scattering and a pronounced emergent electric field, as observed in the imaginary component of the complex impedance. Spin dynamics simulations reveal that domain-wall sliding dominates over spin-tilting, in which the phase delay of the domain-wall motion with respect to the driving force impacts the emergent electric field. Our findings establish domain-wall dynamics as a platform for studying emergent electromagnetic fields and motivate further investigations of the coupled motion of magnetic solitons and conduction electrons.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"28 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145968745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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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