Issue |
EPL
Volume 135, Number 6, September 2021
|
|
---|---|---|
Article Number | 67002 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/ac2248 | |
Published online | 15 November 2021 |
Non-adiabatic superconductivity in the electron-doped graphene
1 Department of Theoretical Physics, Faculty of Science and Technology, Jan Długosz University in Cze¸stochowa 13/15 Armii Krajowej Ave., 42200 Cze¸stochowa, Poland
2 Department of Physics, Faculty of Production Engineering and Materials Technology, Cze¸stochowa University of Technology 19 Armii Krajowej Ave., 42200 Cze¸stochowa, Poland
(a) d.szczesniak@ujd.edu.pl (corresponding author)
Received: 26 May 2021
Accepted: 30 August 2021
In the present study, we investigate the impact of the non-adiabatic effects on the superconducting state in the electron-doped graphene. In particular, by using the Eliashberg formalism we analyze the case scenario of the nitrogen-doped graphene, showing that the non-adiabatic effects complement electron-electron interaction and notably reduce (up to ∼ 40%) pivotal thermodynamic properties, such as: the critical temperature, the superconducting gap and their characteristic ratio. Interestingly, the influence of the non-adiabatic effects is found to rise together with the increase of the depairing Coulomb interaction. These observations are elucidated based on the structure of the vertex corrections to the electron-phonon interaction. As a result, we draw a direction for the future research in the field of the two-dimensional non-adiabatic superconductivity.
© 2021 EPLA
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