Electronic structure of FeSe monolayer superconductors

  title={Electronic structure of FeSe monolayer superconductors},
  author={I A Nekrasov and N S Pavlov and Mikhail V. Sadovskii and A. A. Slobodchikov},
  journal={Low Temperature Physics},
We review a variety of theoretical and experimental results concerning electronic band structure of superconducting materials based on FeSe monolayers. Three type of systems are analyzed: intercalated FeSe systems AxFe2Se2–xSx and [Li1–xFexOH]FeSe as well as the single FeSe layer films on SrTiO3 substrate. We present the results of detailed first principle electronic band structure calculations for these systems together with comparison with some experimental ARPES data. The electronic… Expand
20 Citations
Metamorphoses of electronic structure of FeSe-based superconductors (Review article)
The electronic structure of FeSe, the simplest iron based superconductor (Fe-SC), conceals a potential of dramatic increase of Tc that realizes under pressure or in a single layer film. This is alsoExpand
High Temperature Superconductivity in FeSe Monolayers
This review discusses the main experiments and theoretical views related to observation of high-temperature superconductivity in intercalated FeSe compounds and single layer films of FeSe onExpand
On the origin of the shallow and “replica” bands in FeSe monolayer superconductors
We compare the electronic structures of single FeSe layer films on SrTiO3 substrate (FeSe/STO) and KxFe2-ySe2 superconductors obtained from extensive LDA and LDA + DMFT calculations with the resultsExpand
Electronic Structure of FeSe Monolayer Superconductors: Shallow Bands and Correlations
Electronic spectra of typical single FeSe layer superconductor—FeSe monolayer film on SrTiO3 substrate (FeSe/STO) obtained from ARPES data reveal several puzzles: what is the origin of shallow andExpand
Temperature induced shift of electronic band structure in Fe(Se,Te)
FeSe, the simplest iron-based superconductor, reveals a variety of puzzling properties and features that could hold a key for the pairing mechanism in this family of superconductors. In particular,Expand
Superconductivity enhancement in FeSe/SrTiO3: a review from the perspective of electron-phonon coupling.
This review of the investigations of the interfacial coupling in FeSe/SrTiO3 from the perspective of electron-phonon coupling (EPC) includes an overview of the experimental measurements associated with different theoretical models and arguments about the EPC, and analyses based on phonon measurements. Expand
High-order replica bands in monolayer FeSe/SrTiO3 revealed by polarization-dependent photoemission spectroscopy
  • Chong Liu, R. Day, +15 authors K. Zou
  • Medicine
  • Nature communications
  • 2021
The mechanism of the enhanced superconductivity in monolayer FeSe/SrTiO3 has been enthusiastically studied and debated over the past decade. One specific observation has been taken to be of centralExpand
A novel metastable state magnetic phase of monolayer FeSe.
A novel metastable magnetic phase is found by systematically calculating total energy of monolayer FeSe in various antiferromagnetic (AFM) orders using first-principles method and can be regarded as a transitional state between checkerboard-likeAFM state and collinear AFM state. Expand
Features of excess conductivity and a possible pseudogap in FeSe superconductors
The temperature dependence of excess conductivity σ′(Т) has been studied in three polycrystalline samples of the FeSe0.94 superconductor, prepared by different technologies. The measured temperatureExpand
Iron based chalcogenide and pnictide superconductors: From discovery to chemical ways forward
Abstract Iron-based superconductors are interesting due to their intrinsic magnetism, which often precedes superconductivity. Since 2008, advances have attempted to resolve this apparent butExpand


Electronic Structure of FeSe Monolayer Superconductors: Shallow Bands and Correlations
Electronic spectra of typical single FeSe layer superconductor—FeSe monolayer film on SrTiO3 substrate (FeSe/STO) obtained from ARPES data reveal several puzzles: what is the origin of shallow andExpand
On peculiarities of superconductivity in the single-layer FeSe/SrTiO3 interfa
Observation of replica bands in the ARPES spectra of the single-layer FeSe on strontium titanate substrate revealed a phonon component among mechanisms behind high Tc superconductivity there. WeExpand
Electronic structure and Fermi surface of new K intercalated iron selenide superconductor KxFe2Se2
Abstract Using the ab initio FLAPW-GGA method we examine the electronic band structure, densities of states, and the Fermi surface topology for a very recently synthesized ThCr 2 Si 2 -type potassiumExpand
Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3.
FeSe/STO is confirmed as an ideal material for studying high-Tc superconductivity by means of in situ four-point probe electrical transport measurements, and rekindle the long-standing idea that electron pairing at interfaces between two different materials can be tailored to achieve high-temperaturesuperconductivity. Expand
Iron-based superconductors: Magnetism, superconductivity, and electronic structure (Review Article)
Angle resolved photoemission spectroscopy (ARPES) reveals the features of the electronic structure of quasi-two-dimensional crystals which are crucial for spin and charge ordering and determine theExpand
Electronic structure and superconductivity of FeSe-related superconductors.
  • Xu Liu, Lin Zhao, +7 authors X. Zhou
  • Materials Science, Physics
  • Journal of physics. Condensed matter : an Institute of Physics journal
  • 2015
The distinct electronic structure and superconducting gap, layer-dependent behavior and insulator-superconductor transition of the FeSe/SrTiO3 films provide critical information in understanding the superconductivity mechanism of iron-based superconductors. Expand
Tuning the band structure and superconductivity in single-layer FeSe by interface engineering.
In situ angle-resolved photoemission spectroscopy is used to investigate various FeSe-based heterostructures grown by molecular beam epitaxy, and it is uncovered that electronic correlations and superconducting gap-closing temperature (Tg) are tuned by interfacial effects. Expand
Iron based superconductors: Pnictides versus chalcogenides
Abstract We present a brief review of the present day situation with studies of high-temperature superconductivity in iron pnictides and chalcogenides. Recent discovery of superconductivity with T cExpand
Electronic structure, topological phase transitions and superconductivity in (K, Cs)xFe2Se2
We present LDA band structure of novel hole doped high temperature superconductors (Tc ∼ 30 K) KxFe2Se2 and CsxFe2Se2 and compare it with previously studied electronic structure of isostructural FeAsExpand
Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3
High-resolution angle-resolved photoemission spectroscopy results reveal an unexpected characteristic of the single-unit-cell FeSe/SrTiO3 system: shake-off bands suggesting the presence of bosonic modes, most probably oxygen optical phonons in SrTiO2, which couple to the FeSe electrons with only a small momentum transfer. Expand