Correlations and Coherence at Different Scales (CCDS25)

Hidden phases, which cannot be reached via a thermal pathway, are a conceptually interesting and technologically relevant subject of nonequilibrium condensed matter studies. Strongly correlated electron systems with spin, charge, and orbital degrees of freedom exhibit competing ordering tendencies, and thus provide a rich platform for the search of nonthermal phases. Recent advances in the theoretical description of strongly-correlated nonequilibrium systems, in particular the development of nonequilibrium dynamical mean field theory, have enabled systematic explorations of such hidden states. In this talk, I will present several examples of nonthermal electronic orders in photo-excited correlated lattice systems. This includes nonthermal spin, orbital and charge order [1,2,3], nonthermal excitonic order [4,5], nonthermal composite order [6], and nonthermal superconducting states [7-10].

[1] J. Li, H. Strand, P. Werner, and M. Eckstein, Nat. Comm. 9, 4581 (2018).
[2] S. Ray and P. Werner, Phys. Rev. B 110, 214433 (2024) (2024).
[3] Y. Murakami, S. Takayoshi, T. Kaneko, A. M. Laeuchli and P. Werner, Phys. Rev. Lett. 130, 106501 (2023).
[4] P. Werner and Y. Murakami, Phys. Rev. B 102, 241103 (2020).
[5] S. Ray and P. Werner, in preparation (2025).
[6] P. Werner and Y. Murakami, Phys. Rev. B 104, L201101 (2021).
[7] J. Li, D. Golez, P. Werner and M. Eckstein, Phys. Rev. B 102, 165136 (2020).
[8] J. Li, M. Mueller, A. Kim, A. Laeuchli, and P. Werner, Phys. Rev. B 107, 205115 (2023).
[9] S. Ray, Y. Murakami, and P. Werner, Phys. Rev. B 108, 174515 (2023).
[10] S. Ray and P. Werner, Phys. Rev. B 110, L041109 (2024).