Theory of Josephson effect in strongly correlated electron systems

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

Abstract

We study Josephson effect in superconducting junction based on the repulsive Hubbard model on the square lattice with the fluctuation exchange approximation and the recursive Green's function method. It is shown that the proximity effect is suppressed by the repulsive interaction in the normal metal, and consequently Josephson current in superconductor/normal metal/superconductor junction is reduced due to the strong correlation effect. This is because the imaginary part of the self energy, which facilitates the damping effect, grows with the repulsive interaction.

Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 2010
Externally publishedYes

Fingerprint

Josephson effect
Superconducting materials
Metals
Recursive functions
recursive functions
Hubbard model
Electrons
Green's function
metals
electrons
Green's functions
Damping
damping
interactions
approximation
energy

Keywords

  • Fluctuation exchange approximation
  • Josephson effect
  • Repulsive Hubbard model

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

Theory of Josephson effect in strongly correlated electron systems. / Yokoyama, Takehito; Onari, Seiichiro; Tanaka, Yukio.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

Yokoyama, Takehito ; Onari, Seiichiro ; Tanaka, Yukio. / Theory of Josephson effect in strongly correlated electron systems. In: Physica C: Superconductivity and its Applications. 2010 ; Vol. 470, No. SUPPL.1.
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