Incommensurate Antiferromagnetism Coexisting with Superconductivity in Two-Dimensional d-p Model

Numerical studies of the two-dimensional d-p model using the Gutzwiller ansatz have exhibited the incommensurate antiferromagnetic state coexisting with superconductivity in the under- and lightly doped regions. Our results are based on the variational Monte Carlo method for the three-band Hubbard m...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2009-01, Vol.78 (1), p.13706
Main Authors: YANAGISAWA, Takashi, MIYAZAKI, Mitake, YAMAJI, Kunihiko
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties
Phenomenological theories (two-fluid, ginzburg-landau, etc.)
Physics
Properties of type I and type II superconductors
Superconductivity
Theory and models of superconducting state
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Summary:Numerical studies of the two-dimensional d-p model using the Gutzwiller ansatz have exhibited the incommensurate antiferromagnetic state coexisting with superconductivity in the under- and lightly doped regions. Our results are based on the variational Monte Carlo method for the three-band Hubbard model with d and p orbitals. We obtained the finite superconducting condensation energy for the coexistent sate at the doping rate x=1/8, 1/12, and 1/16, up to the systems of 256 unit cells with 768 atoms (oxygen and copper atoms). The phase diagram for the hole-doped case is consistent with recent results reported for layered high temperature cuprates.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.78.013706