Strong pairing and microscopic inhomogeneity of lattice fermion systems

S. Yamada, M. Machida, Yoji Ohashi, H. Matsumoto

Research output: Contribution to journalArticle

Abstract

In order to study an interplay between electronic inhomogeneity and superconductivity as seen in high-Tc cuprates, we numerically examine attractive Hubbard model in the absence of the translation symmetry. We systematically calculate the particle density profile for both 1-D and 2-D attractive Hubbard models with harmonic potential wells using the exact diagonalization and the density-matrix renormalization group methods. The numerical results reveal that fine inhomogeneous zig-zag patterns universally emerge in the 1-D model case and the zig-zag structure becomes checkerboard type in the 2-D one. Moreover, it is numerically and theoretically found that such inhomogeneities are caused by double occupation component, i.e., pairs tightly bound on a site.

Original languageEnglish
Pages (from-to)103-106
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume463-465
Issue numberSUPPL.
DOIs
Publication statusPublished - 2007 Oct 1

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Hubbard model
Fermions
inhomogeneity
fermions
Superconductivity
renormalization group methods
occupation
cuprates
superconductivity
harmonics
symmetry
profiles
electronics

Keywords

  • Attractive Hubbard model
  • Confinement potential
  • Electronic inhomogeneity

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Strong pairing and microscopic inhomogeneity of lattice fermion systems. / Yamada, S.; Machida, M.; Ohashi, Yoji; Matsumoto, H.

In: Physica C: Superconductivity and its Applications, Vol. 463-465, No. SUPPL., 01.10.2007, p. 103-106.

Research output: Contribution to journalArticle

Yamada, S. ; Machida, M. ; Ohashi, Yoji ; Matsumoto, H. / Strong pairing and microscopic inhomogeneity of lattice fermion systems. In: Physica C: Superconductivity and its Applications. 2007 ; Vol. 463-465, No. SUPPL. pp. 103-106.
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