TY - JOUR
T1 - Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice
AU - Kanada, Ken
AU - Watanabe, Tsutomu
AU - Onari, Seiichiro
AU - Tanaka, Yukio
N1 - Funding Information:
During the past three years, 45 engineers, scientists and support personnel have worked hard at JPL to bring the AVIRIS system to completion. The author would like to express his deep gratitude to all those whose efforts have contributed to the success of this joint endeavor. The work described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
PY - 2008/12
Y1 - 2008/12
N2 - A half-filled-band extended Hubbard model on an anisotropic triangular lattice is studied, using an exact diagonalization method, with κ-(BEDT-TTF)2X in mind. In the isotropic case, the charge fluctuation of (2 π / 3, 2 π / 3) is enhanced by the introduction of off-site Coulomb interaction (V). In the case of V = 0, the antiferromagnetic (AF) fluctuation is sizable for small frustration. However, when V is introduced, the AF fluctuation is rapidly suppressed and becomes substantially small, irrespective of the strength of frustration. Thus, it is revealed that both spin and charge fluctuations are sensitive to the shifts of t′ / t and V / t.
AB - A half-filled-band extended Hubbard model on an anisotropic triangular lattice is studied, using an exact diagonalization method, with κ-(BEDT-TTF)2X in mind. In the isotropic case, the charge fluctuation of (2 π / 3, 2 π / 3) is enhanced by the introduction of off-site Coulomb interaction (V). In the case of V = 0, the antiferromagnetic (AF) fluctuation is sizable for small frustration. However, when V is introduced, the AF fluctuation is rapidly suppressed and becomes substantially small, irrespective of the strength of frustration. Thus, it is revealed that both spin and charge fluctuations are sensitive to the shifts of t′ / t and V / t.
KW - A. Organic compounds
KW - D. Charge-density waves
KW - D. Spin-density waves
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U2 - 10.1016/j.jpcs.2008.06.083
DO - 10.1016/j.jpcs.2008.06.083
M3 - Article
AN - SCOPUS:57049089395
VL - 69
SP - 3334
EP - 3336
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 12
ER -