# RPA Analysis of a Two-orbital Model for the BiS2-based Superconductors

@article{Martins2013RPAAO,
title={RPA Analysis of a Two-orbital Model for the BiS2-based Superconductors},
author={George B. Martins and Adriana Moreo and Elbio Dagotto},
journal={Physical Review B},
year={2013},
volume={87},
pages={081102}
}
• Published 2 December 2012
• Physics, Materials Science
• Physical Review B
The random-phase approximation (RPA) is here applied to a two-orbital model for the ${\mathrm{BiS}}_{2}$-based superconductors that was recently proposed by Usui et al. [Phys. Rev. B 86, 220501(R) (2012)]. Varying the density of doped electrons per Bi site $n$ in the range $0.46\ensuremath{\le}n\ensuremath{\le}1.0$, the spin fluctuations promote competing ${A}_{1g}$ and ${B}_{2g}$ superconducting states with similar pairing strengths, in analogy with the ${A}_{1g}$-${B}_{1g}$ near degeneracy…
47 Citations

## Figures and Tables from this paper

Local Electronic Structures Around a Nonmagnetic Impurity in $$\hbox {BiS}_2$$BiS2-Based Superconductors
• Physics
Journal of Low Temperature Physics
• 2018
In a superconductor, the crucial requirement is to confirm the pairing symmetry of the superconducting (SC) state, which could help to reveal the underlying SC mechanism. In this paper, we use the
Electron-Phonon Superconductivity in LaO$_{0.5}$F$_{0.5}$BiSe$_{2}$
• Physics
• 2014
We report density functional calculations of the electronic structure, Fermi surface, phonon spectrum and electron--phonon coupling for newly discovered superconductor LaO$_{0.5}$F$_{0.5}$BiSe$_{2}$.
RVB States in doped Band Insulators from Coloumb forces: Theory and a case study of Superconductivity in BiS$_2$ Layers
Doped band insulators, HfNCl, WO$_3$, diamond, Bi$_2$Se$_3$, \bis2 families, STO/LAO interface, gate doped SrTiO$_3$ and MoS$_2$ etc. are unusual superconductors. With an aim to build a general
Effect of La Doping on the Electronic Structure of BiS$$_{2}$$2-Based Superconductor Sr$$_{1-x}$$1-xLa$$_{x}$$xFBiS$$_{2}$$2
• Physics
• 2015
By means of first-principles calculations, we have systematically studied the La doping effect for the recently discovered layered BiS$$_{2}$$2-based superconductor
Impurity Effect as a Probe of the Pairing Symmetry in BiS2-Based Superconductors
The impurity effects are studied for the BiS2-layered superconductors based on a two-orbital model with the Bogoliubov-de-Gennes technique. The superconducting critical temperature (Tc) is calculated
Electronic structure of a new layered bismuth oxyselenide superconductor: LaO0.5F0.5BiSe2.
• Physics
Journal of physics. Condensed matter : an Institute of Physics journal
• 2015
The results suggest that LaO(0.5)F(0-5)BiSe(2) is a conventional BCS superconductor without strong electron correlations, and the renormalization factor is nearly 1.0, indicating the electron correlations in this material are rather weak.
Superconducting Properties of NdO0.5F0.5BiS2 Single Crystals
• Physics, Materials Science
• 2016
We report on superconducting properties of high-quality single crystals of F-substituted NdOBiS2 using low-temperature magnetization and transport measurements. Using the mixture of CsCl and KCl as
Spin–orbit coupling, minimal model and potential Cooper-pairing from repulsion in BiS2-superconductors
• Physics
• 2017
We develop the realistic minimal electronic model for recently discovered BiS2 superconductors including the spin–orbit (SO) coupling based on the first-principles band structure calculations. Due to