Apr, 1994
ELECTRONIC-STRUCTURE OF ONE-DIMENSIONAL EXTENDED HUBBARD-MODEL
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- Volume
- 63
- Number
- 4
- First page
- 1250
- Last page
- 1253
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1143/JPSJ.63.1250
- Publisher
- PHYSICAL SOC JAPAN
We investigated the one-dimensional extended Hubbard model with the on-site interaction U and the nearest-neighbor interaction V by using the numerical diagonalization method. Assuming the Luttinger liquid relations, we obtained the phase diagram of the ground state on the U-V plane. In the weak coupling region, the phase diagram agrees with the result of geology. On the other hand, in the strong coupling region for V much greater than \t\, a novel superconducting phase appears both for positive and negative U. We also investigated the charge gap and the spin gap. The results suggest that the superconducting phase extends over the Tomonaga-Luttinger region (without spin gap) and the Luther-Emery region (with spin gap).
- Link information
- ID information
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- DOI : 10.1143/JPSJ.63.1250
- ISSN : 0031-9015
- Web of Science ID : WOS:A1994NG89000007