Optically Probing Unconventional Superconductivity in Atomically Thin Bi$_2$Sr$_2$Ca$_{0.92}$Y$_{0.08}$Cu$_2$O$_{8+δ}$
Yunhuan Xiao, Jingda Wu, Jerry I Dadap, Kashif Masud Awan, Dongyang Yang, Jing Liang, Kenji Watanabe, Takashi Taniguchi, Marta Zonno, Martin Bluschke, Hiroshi E… 展开作者
Yunhuan Xiao, Jingda Wu, Jerry I Dadap, Kashif Masud Awan, Dongyang Yang, Jing Liang, Kenji Watanabe, Takashi Taniguchi, Marta Zonno, Martin Bluschke, Hiroshi Eisaki, Martin Greven, Andrea Damascelli, Ziliang Ye
Atomically thin cuprates exhibiting a superconducting phase transition temperature similar to bulk have recently been realized, although the device fabrication remains a challenge and limits the potential for many novel studies and applications. Here we use an optical pump-probe approach to noninvasively study the unconventional superconductivity in atomically thin Bi$_2$Sr$_2$Ca$_{0.92}$Y$_{0.08}$Cu$_2$O$_{8+δ}$ (Y-Bi2212). Apart from finding an optical response due to the superconducting phase transition that is similar to bulk Y-Bi2212, we observe that the sign and amplitude of the pump-probe signal in the atomically thin flake vary significantly in different dielectric environments depending on the nature of the optical excitation. By exploiting the spatial resolution of the optical probe, we uncover the exceptional sensitivity of monolayer Y-Bi2212 to the environment. Our results provide the first optical evidence for the intralayer nature of the superconducting condensate in Bi2212, and highlight the role of double-sided encapsulation in preserving superconductivity in atomically thin cuprates.
Spectroscopy of Wigner crystal polarons in an atomically thin semiconductor
University of Basel（巴塞尔大学）；Technical University of Munich（慕尼黑工业大学）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；National Institute for Materials Science（物质材料研究机构）
Anyon-trions in atomically thin semiconductor heterostructures
Ludwig-Maximilians-Universität München（慕尼黑大学）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Collège de France（法兰西公学院）；CNRS（法国国家科学研究中心）；ENS-Université PSL（巴黎高等师范学院-巴黎文理研究大学）；Sorbonne Université（索邦大学）；International Solvay Institutes（国际索尔维研究所）；Université Libre de Bruxelles（布鲁塞尔自由大学）；ETH Zürich（苏黎世联邦理工学院）
Electrical Probing of Dark Excitons through Microwave Permittivity
University of Texas at Austin（德克萨斯大学奥斯汀分校）；Washington University in St Louis（华盛顿大学圣路易斯分校）；University of Wisconsin-Madison（威斯康星大学麦迪逊分校）；Texas Materials Institute, The University of Texas at Austin（德克萨斯大学奥斯汀分校德克萨斯材料研究所）；Walker Department of Mechanical Engineering, Materials Science and Engineering Program, University of Texas at Austin（德克萨斯大学奥斯汀分校沃克机械工程系材料科学与工程项目）；National Institute for Materials Science（日本国立物质材料研究所）
Optical Voltage Profiling of 2D Semiconductors via Proximal Exciton Sensing
University of California, Berkeley（加州大学伯克利分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Kavli Energy NanoScience Institute（卡弗里纳米科学能源研究所）；National Institute for Materials Science（材料科学国立研究所）
