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Title: Exploring nonequilibrium phases of photo-doped Mott insulators with generalized Gibbs ensembles

Journal Article · · Communications Physics
ORCiD logo [1];  [2];  [3]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [6]
  1. Tokyo Institute of Technology (Japan); Tokyo Institute of Technology (Japan)
  2. Konan Univ., Kobe (Japan)
  3. Columbia Univ., New York, NY (United States)
  4. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); Univ. of Ljubljana (Slovenia)
  5. Columbia Univ., New York, NY (United States); Flatiron Institute, New York, NY (United States)
  6. Univ. of Fribourg (Switzerland)

Many experiments show that strong excitations of correlated quantum materials can cause non-thermal phases without equilibrium analogues. Understanding the origin and properties of these nonequilibrium states has been challenging due to the limitations of theoretical methods for nonequilibrium strongly correlated systems. In this work, we introduce a generalized Gibbs ensemble description that enables a systematic analysis of the long-time behavior of photo-doped states in Mott insulators based on equilibrium methods. We demonstrate the power of the method by mapping out the nonequilibrium phase diagram of the one-dimensional extended Hubbard model, which featuresη-pairing and charge density wave phases in a wide photo-doping range. We furthermore clarify that the peculiar kinematics of photo-doped carriers, and the interaction between them, play an essential role in the formation of these non-thermal phases. Our results establish a new path for the systematic analysis of nonequilibrium strongly correlated systems.

Research Organization:
Columbia Univ., New York, NY (United States)
Sponsoring Organization:
JSPS KAKENHI; Slovenian Research Agency (ARRS); USDOE Office of Science (SC)
Grant/Contract Number:
SC0019443
OSTI ID:
1978732
Journal Information:
Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 5; ISSN 2399-3650
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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