Superconductivity induced by Ag intercalation in Dirac semimetal Bi2Se3
Koley, S. 1Basu, Saurabh2
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作者信息
1. North Eastern Hill Univ
2. Indian Inst Technol
折叠
Abstract
In this paper we have investigated the physical and transport properties of Bismuth Selenide, (Bi2Se3) intercalated with Silver (Ag) (Gold (Au) is included for comparison) via dynamical mean field theory with local density approximation. The band structure of Bi2Se3 with a Dirac cone is strongly influenced by the intercalation phenomena at moderate densities which eventually leads to an orbital selective metal insulator transition leading to superconductivity at low temperatures. The claims on the orbital selectivity are substantiated by computing the density of states. While the onset of superconducting correlations at low temperatures are supported by a sudden drop in the resistivity as a function of temperature and the nature of susceptibility. Further the Fermi surface (FS) maps for low and high temperature yields no FS reconstruction.
Key words
Density functional theory/Electronic structure/Dynamical mean field theory/Superconductivity/CHEMICAL INTERCALATION/ELECTRONIC-STRUCTURE/TRANSITION
NSTL
Elsevier