Pub Date : 2024-10-11DOI: 10.1038/s41567-024-02682-y
Adapting an experimental tool for use in a new field can be as powerful as inventing a new technique.
将一种实验工具应用于一个新的领域，其作用不亚于发明一种新技术。
{"title":"Old tools, new insights","authors":"","doi":"10.1038/s41567-024-02682-y","DOIUrl":"10.1038/s41567-024-02682-y","url":null,"abstract":"Adapting an experimental tool for use in a new field can be as powerful as inventing a new technique.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 10","pages":"1519-1519"},"PeriodicalIF":17.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41567-024-02682-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405649","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 : 2024-10-10DOI: 10.1038/s41567-024-02640-8
Christian Heide, Yuki Kobayashi, Sheikh Rubaiat Ul Haque, Shambhu Ghimire
High-harmonic spectroscopy, an ultrafast all-optical technique initially conceptualized in atomic and molecular systems, has now emerged as a powerful platform for studying the structure and dynamics of condensed matter. Unlike that in the gas phase, solid-state high-harmonic generation relies on the fundamental response from high atomic density and periodicity, leading to interband transitions and coherent driving of electrons and holes in their respective bands. These mechanisms make high-harmonic spectroscopy particularly sensitive to the electronic band structure, topological properties and many-body correlations in condensed media. An advantage of high-harmonic spectroscopy over other spectroscopic methods is its ability to probe ultrafast phenomena, capturing femto- to attosecond dynamics of multi-band and strongly correlated electron interactions in solids. In this Review, we discuss the latest experimental and theoretical advances in ultrafast high-harmonic spectroscopy of solids and provide perspectives for future research in this field. High-harmonic spectroscopy on solids is an ultrafast all-optical technique to study the structure and dynamics of materials. This Review discusses areas of condensed-matter physics where this technique can provide particular insight.
{"title":"Ultrafast high-harmonic spectroscopy of solids","authors":"Christian Heide, Yuki Kobayashi, Sheikh Rubaiat Ul Haque, Shambhu Ghimire","doi":"10.1038/s41567-024-02640-8","DOIUrl":"10.1038/s41567-024-02640-8","url":null,"abstract":"High-harmonic spectroscopy, an ultrafast all-optical technique initially conceptualized in atomic and molecular systems, has now emerged as a powerful platform for studying the structure and dynamics of condensed matter. Unlike that in the gas phase, solid-state high-harmonic generation relies on the fundamental response from high atomic density and periodicity, leading to interband transitions and coherent driving of electrons and holes in their respective bands. These mechanisms make high-harmonic spectroscopy particularly sensitive to the electronic band structure, topological properties and many-body correlations in condensed media. An advantage of high-harmonic spectroscopy over other spectroscopic methods is its ability to probe ultrafast phenomena, capturing femto- to attosecond dynamics of multi-band and strongly correlated electron interactions in solids. In this Review, we discuss the latest experimental and theoretical advances in ultrafast high-harmonic spectroscopy of solids and provide perspectives for future research in this field. High-harmonic spectroscopy on solids is an ultrafast all-optical technique to study the structure and dynamics of materials. This Review discusses areas of condensed-matter physics where this technique can provide particular insight.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 10","pages":"1546-1557"},"PeriodicalIF":17.6,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397706","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 : 2024-10-08DOI: 10.1038/s41567-024-02689-5
Trevor Arp, Owen Sheekey, Haoxin Zhou, C. L. Tschirhart, Caitlin L. Patterson, H. M. Yoo, Ludwig Holleis, Evgeny Redekop, Grigory Babikyan, Tian Xie, Jiewen Xiao, Yaar Vituri, Tobias Holder, Takashi Taniguchi, Kenji Watanabe, Martin E. Huber, Erez Berg, Andrea F. Young
{"title":"Author Correction: Intervalley coherence and intrinsic spin–orbit coupling in rhombohedral trilayer graphene","authors":"Trevor Arp, Owen Sheekey, Haoxin Zhou, C. L. Tschirhart, Caitlin L. Patterson, H. M. Yoo, Ludwig Holleis, Evgeny Redekop, Grigory Babikyan, Tian Xie, Jiewen Xiao, Yaar Vituri, Tobias Holder, Takashi Taniguchi, Kenji Watanabe, Martin E. Huber, Erez Berg, Andrea F. Young","doi":"10.1038/s41567-024-02689-5","DOIUrl":"10.1038/s41567-024-02689-5","url":null,"abstract":"","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1840-1840"},"PeriodicalIF":17.6,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41567-024-02689-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384506","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 : 2024-10-03DOI: 10.1038/s41567-024-02630-w
L. Y. Cheung, R. Haller, A. Kononov, C. Ciaccia, J. H. Ungerer, T. Kanne, J. Nygård, P. Winkel, T. Reisinger, I. M. Pop, A. Baumgartner, C. Schönenberger
When two superconductors are separated by a weak link, a supercurrent is carried by Andreev bound states formed by the phase-coherent reflection of electrons and their time-reversed partners. The two levels associated with a single, highly transmissive Andreev bound state can serve as a qubit due to the potentially large energy difference with the next bound state. Although coherent manipulation of these so-called Andreev pair qubits has been demonstrated, long-range qubit–qubit coupling, which is necessary for advanced quantum computing architectures, has not yet been achieved. Here, we demonstrate coherent remote coupling between two Andreev pair qubits mediated by a microwave photon in a superconducting cavity coupler. The latter hosts two modes that are engineered to have very different coupling rates to an external port. The strongly coupled mode can be used to perform a fast read-out of each qubit, while we use the weakly coupled mode to mediate the coupling between the qubits. When both qubits are tuned into resonance with the latter mode, we find excitation spectra with characteristic avoided crossings. We identify two-qubit states that are entangled over a distance of 6 mm. This work establishes Andreev pair qubits as a compact and scalable approach to developing quantum computers. Qubits formed from Andreev bound states in a Josephson junction could have performance advantages over existing superconducting qubits. Here proof-of-principle experiments demonstrate long-range coupling between Andreev-level qubits.
{"title":"Photon-mediated long-range coupling of two Andreev pair qubits","authors":"L. Y. Cheung, R. Haller, A. Kononov, C. Ciaccia, J. H. Ungerer, T. Kanne, J. Nygård, P. Winkel, T. Reisinger, I. M. Pop, A. Baumgartner, C. Schönenberger","doi":"10.1038/s41567-024-02630-w","DOIUrl":"10.1038/s41567-024-02630-w","url":null,"abstract":"When two superconductors are separated by a weak link, a supercurrent is carried by Andreev bound states formed by the phase-coherent reflection of electrons and their time-reversed partners. The two levels associated with a single, highly transmissive Andreev bound state can serve as a qubit due to the potentially large energy difference with the next bound state. Although coherent manipulation of these so-called Andreev pair qubits has been demonstrated, long-range qubit–qubit coupling, which is necessary for advanced quantum computing architectures, has not yet been achieved. Here, we demonstrate coherent remote coupling between two Andreev pair qubits mediated by a microwave photon in a superconducting cavity coupler. The latter hosts two modes that are engineered to have very different coupling rates to an external port. The strongly coupled mode can be used to perform a fast read-out of each qubit, while we use the weakly coupled mode to mediate the coupling between the qubits. When both qubits are tuned into resonance with the latter mode, we find excitation spectra with characteristic avoided crossings. We identify two-qubit states that are entangled over a distance of 6 mm. This work establishes Andreev pair qubits as a compact and scalable approach to developing quantum computers. Qubits formed from Andreev bound states in a Josephson junction could have performance advantages over existing superconducting qubits. Here proof-of-principle experiments demonstrate long-range coupling between Andreev-level qubits.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1793-1797"},"PeriodicalIF":17.6,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142369011","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 : 2024-10-03DOI: 10.1038/s41567-024-02639-1
Max Hays, Valla Fatemi
Semiconductor spin qubits are usually highly localized, which makes it difficult to engineer long-range interactions. Two recent experiments demonstrate that adding superconductivity makes supercurrent-based long-range coupling possible.
{"title":"Qubits inside junctions get joined up","authors":"Max Hays, Valla Fatemi","doi":"10.1038/s41567-024-02639-1","DOIUrl":"10.1038/s41567-024-02639-1","url":null,"abstract":"Semiconductor spin qubits are usually highly localized, which makes it difficult to engineer long-range interactions. Two recent experiments demonstrate that adding superconductivity makes supercurrent-based long-range coupling possible.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1698-1699"},"PeriodicalIF":17.6,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142368977","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 : 2024-09-30DOI: 10.1038/s41567-024-02612-y
J. Karthein, C. M. Ricketts, R. F. Garcia Ruiz, J. Billowes, C. L. Binnersley, T. E. Cocolios, J. Dobaczewski, G. J. Farooq-Smith, K. T. Flanagan, G. Georgiev, W. Gins, R. P. de Groote, F. P. Gustafsson, J. D. Holt, A. Kanellakopoulos, Á. Koszorús, D. Leimbach, K. M. Lynch, T. Miyagi, W. Nazarewicz, G. Neyens, P.-G. Reinhard, B. K. Sahoo, A. R. Vernon, S. G. Wilkins, X. F. Yang, D. T. Yordanov
Understanding the nuclear properties in the vicinity of 100Sn, which has been suggested to be the heaviest doubly magic nucleus with proton number Z equal to neutron number N, has been a long-standing challenge for experimental and theoretical nuclear physics. In particular, contradictory experimental evidence exists regarding the role of nuclear collectivity in this region of the nuclear chart. Here, we provide further evidence for the doubly magic character of 100Sn by measuring the ground-state electromagnetic moments and nuclear charge radii of indium (Z = 49) isotopes as N approaches 50 from above using precision laser spectroscopy. Our results span almost the complete range between the two major closed neutron shells at N = 50 and N = 82 and reveal parabolic trends as a function of the neutron number, with a clear reduction towards these two closed neutron shells. A detailed comparison between our experimental results and numerical results from two complementary nuclear many-body frameworks (density functional theory and ab initio methods) exposes deficiencies in nuclear models and establishes a benchmark for future theoretical developments. Precision laser spectroscopy of ground-state electromagnetic moments and nuclear charge radii of indium shows that 100Sn has closed proton and neutron shells. The results serve as a benchmark for future theoretical models.
100Sn 被认为是质子数 Z 等于中子数 N 的最重的双魔核，了解 100Sn 附近的核特性一直是实验和理论核物理面临的长期挑战。特别是关于核集合性在核图这一区域的作用，存在着相互矛盾的实验证据。在这里，我们利用精密激光光谱法测量了铟同位素（Z = 49）在 N 从上往下接近 50 时的基态电磁矩和核电荷半径，从而为 100Sn 的双魔力特性提供了进一步的证据。我们的结果几乎涵盖了 N = 50 和 N = 82 时两个主要封闭中子壳之间的全部范围，并揭示了与中子数函数相关的抛物线趋势，以及向这两个封闭中子壳方向的明显减弱。我们的实验结果与两个互补的核多体框架（密度泛函理论和 ab initio 方法）的数值结果之间的详细比较揭示了核模型的缺陷，并为未来的理论发展确立了基准。
{"title":"Electromagnetic properties of indium isotopes illuminate the doubly magic character of 100Sn","authors":"J. Karthein, C. M. Ricketts, R. F. Garcia Ruiz, J. Billowes, C. L. Binnersley, T. E. Cocolios, J. Dobaczewski, G. J. Farooq-Smith, K. T. Flanagan, G. Georgiev, W. Gins, R. P. de Groote, F. P. Gustafsson, J. D. Holt, A. Kanellakopoulos, Á. Koszorús, D. Leimbach, K. M. Lynch, T. Miyagi, W. Nazarewicz, G. Neyens, P.-G. Reinhard, B. K. Sahoo, A. R. Vernon, S. G. Wilkins, X. F. Yang, D. T. Yordanov","doi":"10.1038/s41567-024-02612-y","DOIUrl":"10.1038/s41567-024-02612-y","url":null,"abstract":"Understanding the nuclear properties in the vicinity of 100Sn, which has been suggested to be the heaviest doubly magic nucleus with proton number Z equal to neutron number N, has been a long-standing challenge for experimental and theoretical nuclear physics. In particular, contradictory experimental evidence exists regarding the role of nuclear collectivity in this region of the nuclear chart. Here, we provide further evidence for the doubly magic character of 100Sn by measuring the ground-state electromagnetic moments and nuclear charge radii of indium (Z = 49) isotopes as N approaches 50 from above using precision laser spectroscopy. Our results span almost the complete range between the two major closed neutron shells at N = 50 and N = 82 and reveal parabolic trends as a function of the neutron number, with a clear reduction towards these two closed neutron shells. A detailed comparison between our experimental results and numerical results from two complementary nuclear many-body frameworks (density functional theory and ab initio methods) exposes deficiencies in nuclear models and establishes a benchmark for future theoretical developments. Precision laser spectroscopy of ground-state electromagnetic moments and nuclear charge radii of indium shows that 100Sn has closed proton and neutron shells. The results serve as a benchmark for future theoretical models.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1719-1725"},"PeriodicalIF":17.6,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142329576","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 : 2024-09-24DOI: 10.1038/s41567-024-02632-8
David Böhringer, Mar Cóndor, Lars Bischof, Tina Czerwinski, Niklas Gampl, Phuong Anh Ngo, Andreas Bauer, Caroline Voskens, Rocío López-Posadas, Kristian Franze, Silvia Budday, Christoph Mark, Ben Fabry, Richard Gerum
Immune cells, such as natural killer cells, migrate with high speeds of several micrometres per minute through dense tissue. However, the magnitude of the traction forces during this migration is unknown. Here we present a method to measure dynamic traction forces of fast migrating cells in biopolymer matrices from the observed matrix deformations. Our method accounts for the mechanical nonlinearity of the three-dimensional tissue matrix and can be applied to time series of confocal or bright-field image stacks. It allows for precise force reconstruction over a wide range of force magnitudes and object sizes—even when the imaged volume captures only a small part of the matrix deformation field. We demonstrate the broad applicability of our method by measuring forces from around 1 nN for axon growth cones up to around 10 μN for mouse intestinal organoids. We find that natural killer cells show bursts of large traction forces around 50 nN that increase with matrix stiffness. These force bursts are driven by myosin II contractility, mediated by integrin β1 adhesions, focal adhesion kinase and Rho-kinase activity, and occur predominantly when the cells migrate through narrow matrix pores. Immune cells are believed not to generate large traction forces during migration. Now, measurements of natural killer cells in dense tissue reveal bursts of large traction forces as they move through narrow pores.
免疫细胞（如自然杀伤细胞）会以每分钟几微米的速度在致密组织中高速迁移。然而，这种迁移过程中的牵引力大小尚不清楚。在此，我们提出了一种方法，通过观察基质变形来测量生物聚合物基质中快速迁移细胞的动态牵引力。我们的方法考虑了三维组织基质的机械非线性，可应用于共聚焦或明视场图像的时间序列。即使成像体积只捕捉到基质变形场的一小部分，它也能在很大的力大小和物体尺寸范围内进行精确的力重建。我们通过测量从轴突生长锥的约 1 nN 到小鼠肠有机体的约 10 μN 的力，证明了我们的方法具有广泛的适用性。我们发现，自然杀伤细胞会爆发出 50 nN 左右的巨大牵引力，并随着基质硬度的增加而增大。这些牵引力爆发由肌球蛋白II收缩力驱动，由整合素β1粘附、局灶性粘附激酶和Rho-激酶活性介导，主要发生在细胞迁移穿过狭窄的基质孔时。
{"title":"Dynamic traction force measurements of migrating immune cells in 3D biopolymer matrices","authors":"David Böhringer, Mar Cóndor, Lars Bischof, Tina Czerwinski, Niklas Gampl, Phuong Anh Ngo, Andreas Bauer, Caroline Voskens, Rocío López-Posadas, Kristian Franze, Silvia Budday, Christoph Mark, Ben Fabry, Richard Gerum","doi":"10.1038/s41567-024-02632-8","DOIUrl":"10.1038/s41567-024-02632-8","url":null,"abstract":"Immune cells, such as natural killer cells, migrate with high speeds of several micrometres per minute through dense tissue. However, the magnitude of the traction forces during this migration is unknown. Here we present a method to measure dynamic traction forces of fast migrating cells in biopolymer matrices from the observed matrix deformations. Our method accounts for the mechanical nonlinearity of the three-dimensional tissue matrix and can be applied to time series of confocal or bright-field image stacks. It allows for precise force reconstruction over a wide range of force magnitudes and object sizes—even when the imaged volume captures only a small part of the matrix deformation field. We demonstrate the broad applicability of our method by measuring forces from around 1 nN for axon growth cones up to around 10 μN for mouse intestinal organoids. We find that natural killer cells show bursts of large traction forces around 50 nN that increase with matrix stiffness. These force bursts are driven by myosin II contractility, mediated by integrin β1 adhesions, focal adhesion kinase and Rho-kinase activity, and occur predominantly when the cells migrate through narrow matrix pores. Immune cells are believed not to generate large traction forces during migration. Now, measurements of natural killer cells in dense tissue reveal bursts of large traction forces as they move through narrow pores.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1816-1823"},"PeriodicalIF":17.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313970","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 : 2024-09-24DOI: 10.1038/s41567-024-02647-1
Jennifer Patten, Karin Wang
A platform for imaging traction forces exerted by moving cells overcomes current reconstruction limitations. This technique has identified unknown migration dynamics of immune cells and resolved traction forces of single and multicellular systems.
{"title":"On the right track","authors":"Jennifer Patten, Karin Wang","doi":"10.1038/s41567-024-02647-1","DOIUrl":"10.1038/s41567-024-02647-1","url":null,"abstract":"A platform for imaging traction forces exerted by moving cells overcomes current reconstruction limitations. This technique has identified unknown migration dynamics of immune cells and resolved traction forces of single and multicellular systems.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1702-1703"},"PeriodicalIF":17.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313966","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 : 2024-09-24DOI: 10.1038/s41567-024-02629-3
C. T. Suen, I. Marković, M. Zonno, N. Heinsdorf, S. Zhdanovich, N. H. Jo, M. Schmid, P. Hansmann, P. Puphal, K. Fürsich, S. Smit, C. Au-Yeung, V. Zimmermann, B. Zwartsenberg, M. Krautloher, I. S. Elfimov, R. Koch, S. Gorovikov, C. Jozwiak, A. Bostwick, M. Franz, Eli Rotenberg, B. Keimer, A. Damascelli
The Mott insulator Ca2RuO4 exhibits an insulator-to-metal transition induced by d.c. current. Despite the thorough examination of the structural changes associated with this transition, a comprehensive knowledge of the response of electronic degrees of freedom is still lacking. Here we demonstrate current-induced modifications of the electronic states of Ca2RuO4. Angle-resolved photoemission spectroscopy in conjunction with four-probe electrical transport (transport-ARPES) measurements reveal a clear reduction of the Mott gap and a modification in the dispersion of the Ru bands. Based on a free-energy analysis, we show that the current-induced phase is electronically distinct from the high-temperature zero-current metallic phase. Our results highlight strong interplay of lattice- and orbital-dependent electronic responses in the current-driven insulator-to-metal transition. Ca2RuO4 is a Mott insulator that becomes a metal when a current is passed through it. Now, the changes in its electronic structure are revealed as this transition takes place.
{"title":"Electronic response of a Mott insulator at a current-induced insulator-to-metal transition","authors":"C. T. Suen, I. Marković, M. Zonno, N. Heinsdorf, S. Zhdanovich, N. H. Jo, M. Schmid, P. Hansmann, P. Puphal, K. Fürsich, S. Smit, C. Au-Yeung, V. Zimmermann, B. Zwartsenberg, M. Krautloher, I. S. Elfimov, R. Koch, S. Gorovikov, C. Jozwiak, A. Bostwick, M. Franz, Eli Rotenberg, B. Keimer, A. Damascelli","doi":"10.1038/s41567-024-02629-3","DOIUrl":"10.1038/s41567-024-02629-3","url":null,"abstract":"The Mott insulator Ca2RuO4 exhibits an insulator-to-metal transition induced by d.c. current. Despite the thorough examination of the structural changes associated with this transition, a comprehensive knowledge of the response of electronic degrees of freedom is still lacking. Here we demonstrate current-induced modifications of the electronic states of Ca2RuO4. Angle-resolved photoemission spectroscopy in conjunction with four-probe electrical transport (transport-ARPES) measurements reveal a clear reduction of the Mott gap and a modification in the dispersion of the Ru bands. Based on a free-energy analysis, we show that the current-induced phase is electronically distinct from the high-temperature zero-current metallic phase. Our results highlight strong interplay of lattice- and orbital-dependent electronic responses in the current-driven insulator-to-metal transition. Ca2RuO4 is a Mott insulator that becomes a metal when a current is passed through it. Now, the changes in its electronic structure are revealed as this transition takes place.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1757-1763"},"PeriodicalIF":17.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41567-024-02629-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313969","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}
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：