Theory of BCS-like bogolon-mediated superconductivity in transition metal dichalcogenides

Meng Sun, A. V. Parafilo, K. H.A. Villegas, V. M. Kovalev, I. G. Savenko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We report on a novel mechanism of BCS-like superconductivity, mediated by a pair of Bogoliubov quasiparticles (bogolons). It takes place in hybrid systems consisting of a two-dimensional electron gas in a transition metal dichalcogenide monolayer in the vicinity of a Bose-Einstein condensate. Taking a system of two-dimensional indirect excitons as a testing ground of Bose-Einstein condensate we show, that the bogolon-pair-mediated electron pairing mechanism is stronger than phonon-mediated and single bogolon-mediated ones. We develop a microscopic theory of bogolon-pair-mediated superconductivity, based on the Schrieffer-Wolff transformation and the Gor'kov's equations, study the temperature dependence of the superconducting gap and estimate the critical temperature of superconducting transition for various electron concentrations in the electron gas and the condensate densities.

Original languageEnglish
Article number023023
JournalNew Journal of Physics
Volume23
Issue number2
DOIs
StatePublished - Feb 2021
Externally publishedYes

Keywords

  • 2D materials
  • hybrid Bose Fermi systems
  • superconductivity in 2D
  • transition metal dichalcogenides

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