Influence of Coulomb interactions on Einstein phonons in a three-dimensional electron gas and superconductivity
Issued Date
2023-01-01
Resource Type
ISSN
17426588
eISSN
17426596
Scopus ID
2-s2.0-85181987218
Journal Title
Journal of Physics: Conference Series
Volume
2653
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Physics: Conference Series Vol.2653 No.1 (2023)
Suggested Citation
Phatcharasirinawakun W., Robkob U. Influence of Coulomb interactions on Einstein phonons in a three-dimensional electron gas and superconductivity. Journal of Physics: Conference Series Vol.2653 No.1 (2023). doi:10.1088/1742-6596/2653/1/012053 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/95625
Title
Influence of Coulomb interactions on Einstein phonons in a three-dimensional electron gas and superconductivity
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Author's Affiliation
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Abstract
This study investigates the influence of Coulomb interactions on Einstein phonons in a three-dimensional electron gas (3DEG) and their impact on superconducting properties. By considering Coulomb effects in all contributions to the phonon self-energies, we explore the renormalization of phonons and its implications for superconductivity. Numerical solutions of the isotropic Eliashberg equations are used to determine the gap functions, providing valuable insights into the behavior of renormalized phonons. Our analysis reveals that while the frequencies of renormalized phonons are lower compared to non-interacting Einstein phonons, their inclusion leads to higher superconducting critical temperatures and maximum gap functions. However, as the strength of Coulomb interactions increases, a decrease in the superconducting critical temperature and gap is observed. These findings highlight the significant role of Coulomb interactions in determining the behavior of phonons and the emergence of superconductivity in three-dimensional electron gases.