Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling

Keisuke Shigeta; Seiichiro Onari; Yukio Tanaka

doi:10.7566/JPSJ.82.014702

Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling

Keisuke Shigeta, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized Éliashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin-orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of the pairing symmetries is an admixture of the spin-singlet and spin-triplet ones. On the basis of our analytical study, it is found that the admixture of the spin-singlet and spin-triplet components depends on not only the predominant pairing symmetry but also the dispersion relation and pairing interaction.

Original language	English
Article number	014702
Journal	Journal of the Physical Society of Japan
Volume	82
Issue number	1
DOIs	https://doi.org/10.7566/JPSJ.82.014702
Publication status	Published - Jan 2013
Externally published	Yes

Keywords

Extended Hubbard model
Non-centrosymmetric
Pairing symmetry
Random phase approximation
Spin-orbit coupling
Strongly correlated electron system
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling",

abstract = "In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized {\'E}liashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin-orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of the pairing symmetries is an admixture of the spin-singlet and spin-triplet ones. On the basis of our analytical study, it is found that the admixture of the spin-singlet and spin-triplet components depends on not only the predominant pairing symmetry but also the dispersion relation and pairing interaction.",

keywords = "Extended Hubbard model, Non-centrosymmetric, Pairing symmetry, Random phase approximation, Spin-orbit coupling, Strongly correlated electron system, Superconductivity",

author = "Keisuke Shigeta and Seiichiro Onari and Yukio Tanaka",

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T1 - Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling

AU - Shigeta, Keisuke

AU - Onari, Seiichiro

AU - Tanaka, Yukio

PY - 2013/1

Y1 - 2013/1

N2 - In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized Éliashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin-orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of the pairing symmetries is an admixture of the spin-singlet and spin-triplet ones. On the basis of our analytical study, it is found that the admixture of the spin-singlet and spin-triplet components depends on not only the predominant pairing symmetry but also the dispersion relation and pairing interaction.

AB - In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized Éliashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin-orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of the pairing symmetries is an admixture of the spin-singlet and spin-triplet ones. On the basis of our analytical study, it is found that the admixture of the spin-singlet and spin-triplet components depends on not only the predominant pairing symmetry but also the dispersion relation and pairing interaction.

KW - Extended Hubbard model

KW - Non-centrosymmetric

KW - Pairing symmetry

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KW - Spin-orbit coupling

KW - Strongly correlated electron system

KW - Superconductivity

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