Papers

Peer-reviewed
Apr, 1994

ELECTRONIC-STRUCTURE OF ONE-DIMENSIONAL EXTENDED HUBBARD-MODEL

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • K SANO
  • ,
  • Y ONO

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
DOI
https://doi.org/10.1143/JPSJ.63.1250
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:A1994NG89000007&DestApp=WOS_CPL
ID information
  • DOI : 10.1143/JPSJ.63.1250
  • ISSN : 0031-9015
  • Web of Science ID : WOS:A1994NG89000007

Export
BibTeX RIS