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

doi:10.1088/1367-2630/abe285

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 journal › Article › peer-review

8 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 language	English
Article number	023023
Journal	New Journal of Physics
Volume	23
Issue number	2
DOIs	https://doi.org/10.1088/1367-2630/abe285
State	Published - Feb 2021
Externally published	Yes

Keywords

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

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10.1088/1367-2630/abe285

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title = "Theory of BCS-like bogolon-mediated superconductivity in transition metal dichalcogenides",

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.",

keywords = "2D materials, hybrid Bose Fermi systems, superconductivity in 2D, transition metal dichalcogenides",

author = "Meng Sun and Parafilo, {A. V.} and Villegas, {K. H.A.} and Kovalev, {V. M.} and Savenko, {I. G.}",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.",

year = "2021",

month = feb,

doi = "10.1088/1367-2630/abe285",

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T1 - Theory of BCS-like bogolon-mediated superconductivity in transition metal dichalcogenides

AU - Sun, Meng

AU - Parafilo, A. V.

AU - Villegas, K. H.A.

AU - Kovalev, V. M.

AU - Savenko, I. G.

PY - 2021/2

Y1 - 2021/2

N2 - 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.

AB - 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.

KW - 2D materials

KW - hybrid Bose Fermi systems

KW - superconductivity in 2D

KW - transition metal dichalcogenides

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DO - 10.1088/1367-2630/abe285

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AN - SCOPUS:85101878125

SN - 1367-2630

VL - 23

JO - New Journal of Physics

JF - New Journal of Physics

IS - 2

M1 - 023023

ER -

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

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Keywords

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