Abstract
In order to investigate the symmetry of a superconducting (SC) pairing state in a staggered field, we solve the linearized Iliashberg's equation based on the random phase approximation and the fluctuation exchange approximation in the Hubbard model under a staggered field. We show that an odd-frequency spin-triplet (equal-spin) s-wave pairing state can be realized in the system. It is caused by the fact that the staggered field suppresses the in-plane spin susceptibility and enhances the charge susceptibility. The latter is due to a spin-dependent modulation in the electron density. The result suggests that the antiferromagnetic (AF) background gives a contribution inherently different from the AF spin fluctuation to SC pairing state.
| Original language | English |
|---|---|
| Article number | 224509 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 85 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Jun 7 2012 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Symmetry of superconducting pairing state in a staggered field. / Shigeta, Keisuke; Onari, Seiichiro; Tanaka, Yukio.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 22, 224509, 07.06.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Symmetry of superconducting pairing state in a staggered field
AU - Shigeta, Keisuke
AU - Onari, Seiichiro
AU - Tanaka, Yukio
PY - 2012/6/7
Y1 - 2012/6/7
N2 - In order to investigate the symmetry of a superconducting (SC) pairing state in a staggered field, we solve the linearized Iliashberg's equation based on the random phase approximation and the fluctuation exchange approximation in the Hubbard model under a staggered field. We show that an odd-frequency spin-triplet (equal-spin) s-wave pairing state can be realized in the system. It is caused by the fact that the staggered field suppresses the in-plane spin susceptibility and enhances the charge susceptibility. The latter is due to a spin-dependent modulation in the electron density. The result suggests that the antiferromagnetic (AF) background gives a contribution inherently different from the AF spin fluctuation to SC pairing state.
AB - In order to investigate the symmetry of a superconducting (SC) pairing state in a staggered field, we solve the linearized Iliashberg's equation based on the random phase approximation and the fluctuation exchange approximation in the Hubbard model under a staggered field. We show that an odd-frequency spin-triplet (equal-spin) s-wave pairing state can be realized in the system. It is caused by the fact that the staggered field suppresses the in-plane spin susceptibility and enhances the charge susceptibility. The latter is due to a spin-dependent modulation in the electron density. The result suggests that the antiferromagnetic (AF) background gives a contribution inherently different from the AF spin fluctuation to SC pairing state.
UR - http://www.scopus.com/inward/record.url?scp=84862194003&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862194003&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.224509
DO - 10.1103/PhysRevB.85.224509
M3 - Article
AN - SCOPUS:84862194003
VL - 85
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 22
M1 - 224509
ER -