Discovery of two-dimensional anisotropic superconductivity at KTaO$_3$ (111) interfaces
Changjiang Liu, Xi Yan, Dafei Jin, Yang Ma, Haw-Wen Hsiao, Yulin Lin, Terence M. Bretz-Sullivan, Xianjing Zhou, John Pearson, Brandon Fisher, J. Samuel Jiang, W… 展开作者
Changjiang Liu, Xi Yan, Dafei Jin, Yang Ma, Haw-Wen Hsiao, Yulin Lin, Terence M. Bretz-Sullivan, Xianjing Zhou, John Pearson, Brandon Fisher, J. Samuel Jiang, Wei Han, Jian-Min Zuo, Jianguo Wen, Dillon D. Fong, Jirong Sun, Hua Zhou, Anand Bhattacharya
The unique electronic structure found at interfaces between materials can allow unconventional quantum states to emerge. Here we observe superconductivity in electron gases formed at interfaces between (111) oriented KTaO$_3$ and insulating overlayers of either EuO or LaAlO$_3$. The superconducting transition temperature, approaching 2.2 K, is about one order of magnitude higher than that of the LaAlO$_3$/SrTiO$_3$ system. Strikingly, similar electron gases at (001) KTaO$_3$ interfaces remain normal down to 25 mK. The critical field and current-voltage measurements indicate that the superconductivity is two dimensional. Higher mobility EuO/KTaO$_3$ (111) samples show a large in-plane anisotropy in transport properties at low temperatures prior to onset of superconductivity, suggesting the emergence of a stripe like phase where the superconductivity is nearly homogeneous in one direction, but strongly modulated in the other.
Inhomogeneous superconductivity in (001), (110), and (111) KTaO$_3$ two-dimensional electronic gases: effect of electronic confinement on the transition temperature
Physics Department “E.R. Caianiello”, Università degli Studi di Salerno（萨莱诺大学 E.R. Caianiello 物理系）；INFN - Sezione collegata di Salerno（意大利国家核物理研究所萨莱诺分部）；CNR-SPIN（国家研究委员会自旋科学研究所）；Physics Department “Ettore Pancini”, Università degli Studi di Napoli Federico II（那不勒斯费德里科二世大学 Ettore Pancini 物理系）
Spin-dependent anisotropic electron-phonon coupling in KTaO$_3$
University of Geneva（日内瓦大学）；University of Modena and Reggio Emilia（摩德纳和雷焦艾米利亚大学）；SPIN-CNR Institute for Superconducting and other Innovative Materials and Devices（超导及其他创新材料器件研究所（SPIN-CNR））；ISC-CNR Institute for Complex Systems（复杂系统研究所（ISC-CNR））；Sapienza University of Rome（罗马智慧大学）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）
Gate-imprinted memory and light-induced erasure of superconductivity at KTaO$_3$-based interfaces
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China（中国科学技术大学微尺度物质科学国家研究中心）；School of Emerging Technology, University of Science and Technology of China（中国科学技术大学前沿技术学院）；Department of Physics, School of Science, Westlake University（西湖大学理学院物理系）；Hefei National Laboratory（合肥国家实验室）；School of Materials Science and Engineering, Peking University（北京大学材料科学与工程学院）
Two-Dimensional Superconductivity at the CaZrO3/KTaO3 (001) Heterointerfaces
Beihang University（北京航空航天大学）；State Key Laboratory of Spintronics Hangzhou International Innovation Institute, Beihang University（北京航空航天大学杭州创新研究院自旋电子学国家重点实验室）；State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University（清华大学物理系低维量子物理国家重点实验室）；Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所凝聚态物理国家实验室）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences（中国科学院宁波材料技术与工程研究所）
Direct Fabrication of a Superconducting Two-Dimensional Electron Gas on KTaO3(111) via Mg-Induced Surface Reduction
University of British Columbia（不列颠哥伦比亚大学）；Quantum Matter Institute, University of British Columbia（不列颠哥伦比亚大学量子物质研究所）；Department of Physics & Astronomy, University of British Columbia（不列颠哥伦比亚大学物理与天文学系）；Max Planck Institute for Solid State Research（马克斯·普朗克固体研究所）
Percolative Pathway to Stripe Order in KTaO3-Based Superconductivity
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Department of Physics and Astronomy, University of British Columbia（不列颠哥伦比亚大学物理与天文学系）；Quantum Matter Institute, University of British Columbia（不列颠哥伦比亚大学量子物质研究所）
Uniaxial spin texture in a superconducting electron gas revealed by exchange interactions
Argonne National Laboratory（阿贡国家实验室）；University at Buffalo, SUNY（布法罗纽约州立大学）；Center for Nanoscale Materials, Argonne National Laboratory（阿贡国家实验室纳米材料中心）；National High Field Magnetic Laboratory（国家高磁场实验室）；University of Notre Dame（圣母大学）
Anisotropic Superconductivity with Enhanced Critical Field in Strained RuO2
The Ohio State University（俄亥俄州立大学）；Cornell University（康奈尔大学）；Williams College（威廉姆斯学院）；Kavli Institute at Cornell for Nanoscale Science, Cornell University（康奈尔大学卡弗里纳米科学研究所）；Leibniz-Institut für Kristallzüchtung（莱布尼茨晶体生长研究所）
Re-entrant superconductivity at an oxide heterointerface
RIKEN Center for Emergent Matter Science (CEMS)（理化学研究所新兴物质科学中心）；Institute of Physics, Martin Luther University Halle-Wittenberg（马丁·路德·哈勒-维滕贝格大学物理研究所）；State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University（清华大学低维量子物理国家重点实验室及物理系）；Department of Physics and Medical Engineering, Rzeszów University of Technology（热舒夫理工大学物理与医学工程系）；Department of Physical Chemistry, University of the Basque Country UPV/EHU（巴斯克地区大学UPV/EHU物理化学系）；Ikerbasque, Basque Foundation for Science（伊克尔巴斯基克，巴斯克科学基金会）；Institute for Theoretical Physics, Johannes Kepler University（约翰内斯·开普勒大学理论物理研究所）；Max Planck Institute of Microstructure Physics（马克斯·普朗克微观结构物理研究所）；Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo（东京大学应用物理系及量子相电子中心）
Weakly anisotropic superconductivity of Pr4Ni3O10 single crystals
ShanghaiTech University（上海科技大学）；Center for High Pressure Science and Technology Advanced Research（高压科学与技术先进研究中心）；Institute for Shanghai Advanced Research in Physical Sciences (SHARPS)（上海物理科学研究院）；Songshan Lake Materials Laboratory（松山湖材料实验室）；Qufu Normal University（曲阜师范大学）；University of Oxford（牛津大学）；Southeast University（东南大学）；Tsinghua University（清华大学）
Comment on ``Anisotropic s-wave superconductivity: comparison with experiments on MgB_2 [A. I. Posazhennikova, T. Dahm and K. Maki, cond-mat/0204272; submitted to Europhys. Lett.]
