Checkerboard States in the Two-Dimensional Hubbard Model with the Bi2212-Type Band

We have performed a variational Monte Carlo simulation on a two-dimensional t-t'-t"-U Hubbard model with a Bi-2212-type band to examine the stability of a 4×4 checkerboard state, which has been observed recently by scanning tunneling microscopy (STM) in Bi-2212 and Na-CCOC. The condensatio...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2009-04, Vol.78 (4), p.43706
Main Authors: MIYAZAKI, Mitake, YAMAJI, Kunihiko, YANAGISAWA, Takashi, KADONO, Ryosuke
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Phenomenological theories (two-fluid, ginzburg-landau, etc.)
Physics
Superconductivity
Theory and models of superconducting state
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Summary:We have performed a variational Monte Carlo simulation on a two-dimensional t-t'-t"-U Hubbard model with a Bi-2212-type band to examine the stability of a 4×4 checkerboard state, which has been observed recently by scanning tunneling microscopy (STM) in Bi-2212 and Na-CCOC. The condensation energies of inhomogeneous magnetic and charge-ordered states at 1/8 hole doping are calculated. We found that the coexistent state of bond-centered four-period diagonal and vertical spin-checkerboard structures characterized by a multi-Q set is stabilized and composed of 4×4 period checkerboarded spin modulation. This state can be understood as an incommensurate spin density wave enhanced by Fermi surface nesting, which appears in the precursory peaks of spin susceptibility at ∼(π,π/2), (π/2,π), and (π/2,π/2).
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.78.043706