Shifts and Splittings of the Hole Bands in the Nematic Phase of FeSe

Abstract

We report a high-resolution laser-based angle-resolved photoemission spectroscopy (laser-ARPES) study of single crystals of FeSe, focusing on the temperature-dependence of the hole-like bands around the $\mathrm{\Gamma }$ point. As the system cools through the tetragonal-orthorhombic "nematic" structural transition at 90~K, the splitting of the $d_{xz}$/$d_{yz}$ bands is observed to increase by a magnitude of 13 meV. Moreover, the onset of a $\sim$10 meV downward shift of the $d_{xy}$ band is also at 90~K. These measurements provide clarity on the nature, magnitude and temperature-dependence of the band shifts at the $\mathrm{\Gamma }$ point in the nematic phase of FeSe.

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Cited by in corpus (20)

• Nematicity, magnetism and superconductivity in FeSe
• The key ingredients of the electronic structure of FeSe
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Suppression of electronic correlations by chemical pressure from FeSe to FeS
• Electronic anisotropies revealed by detwinned ARPES measurements of FeSe
• Scaling of the superconducting gap with orbital character in FeSe
• Strain-tuning of nematicity and superconductivity in single crystals of FeSe
• Revealing the single electron pocket of FeSe in a single orthorhombic domain
• Strongly enhanced temperature dependence of the chemical potential in FeSe
• Spin-Orbital-Intertwined Nematic State in FeSe
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• $k_z$ selective scattering within Quasiparticle Interference measurements of FeSe
• FeSe and the missing electron pocket problem
• Evidence for an Additional Symmetry Breaking from Direct Observation of Band Splitting in the Nematic State of FeSe Superconductor
• Anomalous contribution to the nematic electronic states from the structural transition in FeSe revealed by time- and angle-resolved photoemission spectroscopy
• Applications for ultimate spatial resolution in LASER based $\mu$-ARPES: A FeSe case study
• Orbital selectivity versus Pomeranchuk instability in the iron-chalcogenide superconductors: A two-loop renormalization group study
• Resurgence of superconductivity and the role of $d_{xy}$ hole band in FeSe${}_{1-x}$Te${}_x$
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe
• Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe