Electronic structure properties in the nematic phases of FeSe

Abstract

We investigate the electronic structures of FeSe in the presence of different possible orders. We find that only ferro-orbital order (FO) and collinear antiferro-magnetism (C-AFM) can simultaneously induce splittings at $\Gamma$ and M. Bicollinear antiferro-magnetism (B-AFM) and spin-orbit coupling (SOC) have very similar band structure on $\Gamma$-M near the Fermi level. The temperature insensitive splitting at $\Gamma$ and the temperature dependent splitting at M observed in recent experiments can be explained by the d-wave bond nematic (dBN) order together with SOC. The recent observed Dirac cones and their temperature ($T$) dependence in FeSe thin films can also be well explained by the dBN order with band renormalization. Their thickness- and cobalt-doping- dependent behaviors are the consequences of electron doping and reduction of Se height. All these suggest that the nematic order in FeSe system is the dBN order.

6 pages, 6 figures + supplementary materials

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Cited by in corpus (11)

• Nematicity, magnetism and superconductivity in FeSe
• The key ingredients of the electronic structure of FeSe
• Evidence for unidirectional nematic bond ordering in FeSe
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Observation of Dirac Cone Band Dispersion in FeSe Thin Films by Photoemission Spectroscopy
• Interplay of nematic and magnetic orders in FeSe under pressure
• Non-local correlations in Iron Pnictides and Chalcogenides
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Influence of orbital nematic order on spin responses in Fe-based superconductors
• Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3