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Nonthermal electronic orders

December 14, 2021 @ 09:00 - 09:25 CET

P. Werner,1 Y. Murakami2

1University of Fribourg, 1700 Fribourg, Switzerland

2Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan

Recent experiments and theoretical studies suggest that electronic orders such as superconductivity or excitonic insulator phases can be realized in highly nonthermal systems. In this talk, I will discuss some examples which have been demonstrated in nonequilibrium dynamical mean field theory simulations of Hubbard-type models. After briefly reviewing results for nonthermal magnetic order and the eta-pairing state in photo-doped Mott insulators, I will discuss in more detail two recent studies on nonthermal excitonic order in a two-orbital Hubbard model with Hund coupling and crystal field splitting [1] and on a nonthermal form of composite order (or odd-frequency orbital order) in a three-orbital Hubbard model which is relevant for the description of A3C60 [2]. The excitonic insulator study reveals a new entropy-trapping mechanism for nonthermal orders, while the fulleride example demonstrates a nonthermal electronic order which is stabilized by the kinetic energy of the photo-excited charge carriers.

  1. P. Werner and Y. Murakami, Phys. Rev. B 102, 241103(R) (2020).
  2. P. Werner and Y. Murakami, Phys. Rev. B 104, L201101 (2021).

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December 14, 2021
09:00 - 09:25 CET
Event Category:
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