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Signatures of the exciton gas phase and its condensation in monolayer 1T-ZrTe2.
Song, Yekai; Jia, Chunjing; Xiong, Hongyu; Wang, Binbin; Jiang, Zhicheng; Huang, Kui; Hwang, Jinwoong; Li, Zhuojun; Hwang, Choongyu; Liu, Zhongkai; Shen, Dawei; Sobota, Jonathan A; Kirchmann, Patrick; Xue, Jiamin; Devereaux, Thomas P; Mo, Sung-Kwan; Shen, Zhi-Xun; Tang, Shujie.
Afiliación
  • Song Y; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
  • Jia C; 2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
  • Xiong H; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.
  • Wang B; Department of Physics, University of Florida, Gainesville, FL, USA.
  • Jiang Z; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.
  • Huang K; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA, USA.
  • Hwang J; Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, PR China.
  • Li Z; School of Physical Science and Technology, ShanghaiTech University, Shanghai, PR China.
  • Hwang C; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
  • Liu Z; School of Physical Science and Technology, ShanghaiTech University, Shanghai, PR China.
  • Shen D; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA, USA.
  • Sobota JA; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Kirchmann P; Department of Physics, Kangwon National Univerisity, Chuncheon, Korea.
  • Xue J; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
  • Devereaux TP; 2020 X-Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
  • Mo SK; Department of Physics, Pusan National University, Busan, Korea.
  • Shen ZX; School of Physical Science and Technology, ShanghaiTech University, Shanghai, PR China.
  • Tang S; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, PR China.
Nat Commun ; 14(1): 1116, 2023 Feb 27.
Article en En | MEDLINE | ID: mdl-36849499
The excitonic insulator (EI) is a Bose-Einstein condensation (BEC) of excitons bound by electron-hole interaction in a solid, which could support high-temperature BEC transition. The material realization of EI has been challenged by the difficulty of distinguishing it from a conventional charge density wave (CDW) state. In the BEC limit, the preformed exciton gas phase is a hallmark to distinguish EI from conventional CDW, yet direct experimental evidence has been lacking. Here we report a distinct correlated phase beyond the 2×2 CDW ground state emerging in monolayer 1T-ZrTe2 and its investigation by angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). The results show novel band- and energy-dependent folding behavior in a two-step process, which is the signatures of an exciton gas phase prior to its condensation into the final CDW state. Our findings provide a versatile two-dimensional platform that allows tuning of the excitonic effect.
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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article
Texto completo
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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article