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2022-12-15T03:34:55Z
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Metal-Insulator Transition of the One-Dimensional U-V Model at Quarter Filling
Metal-Insulator Transition of the One-Dimensional U-V Model at Quarter Filling
Sano, Kazuhiro
Ono, Yoshiaki
D. electrical properties
D.phase transitions
The metal-insulator transition of the one-dimensional extended Hubbard model with both on-site U and nearest neighbor V interactions is studied by a combination of the numerical diagonalization and the renormalization group (RG) method. We diagonalize finite size systems numerically and calculate the Luttinger-liquid parameter Kρ. Substituting the numerical result to the RG equations as the initial condition, we explicitly calculate the renormalized Kρ and the renormalized umk-lapp scattering parameter G. This approach gives the critical properties of the Kρ and the charge gap near the metal-insulator transition beyond the usual nite-size scaling for the numerical diagonalization result. We also obtain a contour map of the charge gap by the numerical diagonalization method on the U-V plain.
Elsevier
2002-06
eng
journal article
http://hdl.handle.net/10191/26886
https://niigata-u.repo.nii.ac.jp/records/2059
info:doi/10.1016/S0022-3697(02)00104-X
AA00704949
00223697
Journal of Physics and Chemistry of Solids
Journal of Physics and Chemistry of Solids
63
6-8
1567
1570
https://niigata-u.repo.nii.ac.jp/record/2059/files/1023.pdf
application/pdf
113.4 kB
2019-07-29