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Title: Theory of BCS-like bogolon-mediated superconductivity in transition metal dichalcogenides
Authors: Sun, Meng
Parafilo A. V.
Villegas, Kristian Hauser A.
Kovalev, V. M.
Savenko, I. G.
Keywords: Science::Physics
Issue Date: 2021
Source: Sun, M., Parafilo A. V., Villegas, K. H. A., Kovalev, V. M. & Savenko, I. G. (2021). Theory of BCS-like bogolon-mediated superconductivity in transition metal dichalcogenides. New Journal of Physics, 23(2), 023023-.
Journal: New Journal of Physics 
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.
ISSN: 1367-2630
DOI: 10.1088/1367-2630/abe285
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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