Superconductivity from a long-range repulsive interaction

S. Onari, R. Arita, K. Kuroki, H. Aoki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The lattice model with short-range interactions (exemplified by the Hubbard model) is known to exhibit quite different features from those in the electron gas with the long-range Coulomb interaction. In order to explore how they cross over to each other, we have studied an extended Hubbard model which includes repulsions up to the 12th neighbors with the simplified fluctuation exchange (FLEX) approximation for the square lattice. We have found that (i) in the most dilute density region, spin and charge fluctuations become comparable, and s- and p-waves superconductivity become dominant, in agreement with the result for the electron gas by Takada, while (ii) the dominant spin fluctuation and its reflection on dx2-y2 and dxy pairing, both the effect of lattice structure, persists well away (n ≳ 0.2) from the half filling.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages559-560
Number of pages2
Volume850
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: Aug 10 2006Oct 17 2006

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period8/10/0610/17/06

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superconductivity
electron gas
interactions
sands
approximation

Keywords

  • Charge fluctuation
  • Electron gas
  • Hubbard model
  • Spin fluctuation
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Onari, S., Arita, R., Kuroki, K., & Aoki, H. (2006). Superconductivity from a long-range repulsive interaction. In AIP Conference Proceedings (Vol. 850, pp. 559-560) https://doi.org/10.1063/1.2354833

Superconductivity from a long-range repulsive interaction. / Onari, S.; Arita, R.; Kuroki, K.; Aoki, H.

AIP Conference Proceedings. Vol. 850 2006. p. 559-560.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Onari, S, Arita, R, Kuroki, K & Aoki, H 2006, Superconductivity from a long-range repulsive interaction. in AIP Conference Proceedings. vol. 850, pp. 559-560, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 8/10/06. https://doi.org/10.1063/1.2354833
Onari S, Arita R, Kuroki K, Aoki H. Superconductivity from a long-range repulsive interaction. In AIP Conference Proceedings. Vol. 850. 2006. p. 559-560 https://doi.org/10.1063/1.2354833
Onari, S. ; Arita, R. ; Kuroki, K. ; Aoki, H. / Superconductivity from a long-range repulsive interaction. AIP Conference Proceedings. Vol. 850 2006. pp. 559-560
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