Normal-state correlated electronic structure of tetragonal FeSe superconductor

7th Brazilian Meeting on Simulational Physics

Craco, L.^1 ; Laad, M.S.^2 ; Leoni, S.^3

Instituto de Física, Universidade Federal de Mato Grosso, 78060-900, Cuiabá, MT, Brazil^1

Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany^2

School of Chemistry, Cardiff University, CF10 3AT, Cardiff, United Kingdom^3

关键词: Anomalous response;    Effective mass;    FeSe superconductors;    Iron chalcogenides;    Low-energy;    Normal state;    Pseudo-gap;    Quantitative agreement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/487/1/012017/pdf
DOI  :  10.1088/1742-6596/487/1/012017

来源: IOP

【 摘 要 】

Tetragonal FeSe, a prototype iron-chalcogenide superconductor, shows signatures of a strange incoherent normal state. Motivated thereby, we use LDA+DMFT to show how multi-band correlations generate a low-energy pseudogap in the normal state, giving an incoherent metal in good semi-quantitative agreement with observations. Anomalous responses in the normal state, including orbital-dependent effective mass enhancement and photoemission lineshape, are consistently understood.