Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 3334-3336 |
| Number of pages | 3 |
| Journal | Journal of Physics and Chemistry of Solids |
| Volume | 69 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2008 |
| Externally published | Yes |
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Keywords
- A. Organic compounds
- D. Charge-density waves
- D. Spin-density waves
ASJC Scopus subject areas
- Condensed Matter Physics
- Chemistry(all)
- Materials Science(all)
Cite this
Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice. / Kanada, Ken; Watanabe, Tsutomu; Onari, Seiichiro; Tanaka, Yukio.
In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 12, 12.2008, p. 3334-3336.Research output: Contribution to journal › Article
}
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
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
UR - http://www.scopus.com/inward/record.url?scp=57049089395&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57049089395&partnerID=8YFLogxK
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 -