Effects of strain on the electronic structure, superconductivity, and nematicity in FeSe studied by angle-resolved photoemission spectroscopy

Abstract

One of central issues in iron-based superconductors is the role of structural change to the superconducting transition temperature (T_c). It was found in FeSe that the lattice strain leads to a drastic increase in T_c, accompanied by suppression of nematic order. By angle-resolved photoemission spectroscopy on tensile- or compressive-strained and strain-free FeSe, we experimentally show that the in-plane strain causes a marked change in the energy overlap (DeltaE_{h-e}) between the hole and electron pockets in the normal state. The change in DeltaE_{h-e} modifies the Fermi-surface volume, leading to a change in T_c. Furthermore, the strength of nematicity is also found to be characterized by DeltaE_{h-e}. These results suggest that the key to understanding the phase diagram is the fermiology and interactions linked to the semimetallic band overlap.

arXiv comment6 pages, 3 figures

References in corpus (25)

• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3
• Gap symmetry and structure of Fe-based superconductors
• Interface-induced superconductivity and strain-dependent spin density wave in FeSe/SrTiO3 thin films
• Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
• Quantum Hall Effect from the Topological Surface States of Strained Bulk HgTe
• Orbital-driven nematicity in FeSe
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Emergence of the nematic electronic state in FeSe
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Reconstruction of Band Structure Induced by Electronic Nematicity in an FeSe Superconductor
• BCS-BEC Crossover and the Unitary Fermi Gas
• Origin of the tetragonal-to-orthorhombic (nematic) phase transition in FeSe: a combined thermodynamic and NMR study
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements
• Anomalous correlation effects and unique phase diagram of electron doped FeSe revealed by angle resolved photoemission spectroscopy
• Observation of two distinct $d_{xz}/d_{yz}$ band splittings in FeSe
• Suppression of superconductivity in FeSe films under tensile strain
• Interatomic Coulomb interaction and electron nematic bond order in FeSe
• Electric Transport of a Single Crystal Iron Chalcogenide FeSe Superconductor: Evidence of Symmetry Breakdown Nematicity and Additional Ultrafast Dirac cone-Like Carriers
• Enhancement of the Superconducting Transition Temperature in FeSe Epitaxial Thin Films by Anisotropic Compression
• Dramatic Changes in the Electronic Structure Upon Transition to the Collapsed Tetragonal Phase in CaFe2As2
• Fermi-Surface Reconstruction and Complex Phase Equilibria in CaFe${}_2$As${}_2$
• Spin Hall effect in iron-based superconductors: A Dirac-point effect

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• Molecular beam epitaxy of superconducting FeSe${}_x$Te${}_{1-x}$ thin films interfaced with magnetic topological insulators
• Insulator-like behavior coexisting with metallic electronic structure in strained FeSe thin films grown by molecular beam epitaxy
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• Charge carrier dynamics of FeSe thin film investigated by terahertz magneto-optical spectroscopy
• Nematic properties of FeSe${}_{1-x}$Te${}_x$ crystals with a low Te content
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• Strain-induced superconductivity in Sr2IrO4
• Stabilization and heteroepitaxial growth of metastable tetragonal FeS thin films by pulsed laser deposition
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• Suppression of nematicity by tensile strain in multilayer FeSe/SrTiO${}_3$ films
• Fe${}_{1+y}$Te${}_x$Se${}_{1-x}$: a delicate and tunable Majorana material
• Multiband effect in elastoresistance of Fe(Se,Te)
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• Phase separation near the charge neutrality point in FeSe${}_{1-x}$Te${}_x$ crystals with x $<$ 0.15
• Symmetry-breaking-induced topology in FeSe