Bose-Einstein condensate-mediated superconductivity in graphene

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

doi:10.1088/2053-1583/ac0b49

Bose-Einstein condensate-mediated superconductivity in graphene

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

11 Scopus citations

Abstract

We propose a mechanism for robust Bardeen-Cooper-Schrieffer-like superconductivity in graphene placed in the vicinity of a Bose-Einstein condensate. Electrons in the graphene interact with the excitations above the condensate, called Bogoliubov quasiparticles (or bogolons). It turns out that bogolon-pair-mediated interaction allows us to surpass the long-standing problem of the vanishing density of states of particles with a linear spectrum. This results in a dramatic enhancement of the superconducting properties of graphene while keeping its relativistic dispersion. We study the behavior of the superconducting gap and calculate critical temperatures in cases with single-bogolon and bogolon-pair-mediated pairing processes, accounting for the complex band structure of graphene. We also compare the critical temperature of the superconducting transition with the BKT temperature.

Original language	English
Article number	031004
Journal	2D Materials
Volume	8
Issue number	3
DOIs	https://doi.org/10.1088/2053-1583/ac0b49
State	Published - Jul 2021
Externally published	Yes

Keywords

Bose Einstein condensation
Dirac particles
density of states
grapheme
high-temperature superconductivity
mesoscopic superconductivity

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10.1088/2053-1583/ac0b49

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title = "Bose-Einstein condensate-mediated superconductivity in graphene",

abstract = "We propose a mechanism for robust Bardeen-Cooper-Schrieffer-like superconductivity in graphene placed in the vicinity of a Bose-Einstein condensate. Electrons in the graphene interact with the excitations above the condensate, called Bogoliubov quasiparticles (or bogolons). It turns out that bogolon-pair-mediated interaction allows us to surpass the long-standing problem of the vanishing density of states of particles with a linear spectrum. This results in a dramatic enhancement of the superconducting properties of graphene while keeping its relativistic dispersion. We study the behavior of the superconducting gap and calculate critical temperatures in cases with single-bogolon and bogolon-pair-mediated pairing processes, accounting for the complex band structure of graphene. We also compare the critical temperature of the superconducting transition with the BKT temperature.",

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

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AU - Sun, Meng

AU - Parafilo, A. V.

AU - Villegas, K. H.A.

AU - Kovalev, V. M.

AU - Savenko, I. G.

PY - 2021/7

Y1 - 2021/7

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AB - We propose a mechanism for robust Bardeen-Cooper-Schrieffer-like superconductivity in graphene placed in the vicinity of a Bose-Einstein condensate. Electrons in the graphene interact with the excitations above the condensate, called Bogoliubov quasiparticles (or bogolons). It turns out that bogolon-pair-mediated interaction allows us to surpass the long-standing problem of the vanishing density of states of particles with a linear spectrum. This results in a dramatic enhancement of the superconducting properties of graphene while keeping its relativistic dispersion. We study the behavior of the superconducting gap and calculate critical temperatures in cases with single-bogolon and bogolon-pair-mediated pairing processes, accounting for the complex band structure of graphene. We also compare the critical temperature of the superconducting transition with the BKT temperature.

KW - Bose Einstein condensation

KW - Dirac particles

KW - density of states

KW - grapheme

KW - high-temperature superconductivity

KW - mesoscopic superconductivity

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Bose-Einstein condensate-mediated superconductivity in graphene

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Keywords

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