Normal state incoherent pseudogap in FeSe superconductor
Tóm tắt
The normal state of Iron chalcogenide superconductors show a range of unconventional
features. Bad-metallic resistivity and proximity to insulating state manifest themselves
in spectral and transport responses. In particular, obervation of low-energy pseudogap
feature in the normal state raises the issue of the nature of processes underpinning its
emergence as well as its relation to unconventional superconductivity. Here, using the
LDA+DMFT method, we show how correlation-induced orbital-selective pseudogap-like physics
underpin these incoherent features in stoichimetric and electron-doped FeSe
superconductor. We discuss the pseudogap regime microscopically, along with implications
for the superconductive instability.
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