THE ETA-PAIRING GROUND-STATES IN THE NEGATIVE-U HUBBARD-MODEL ARE SUPERSOLID

Authors
TIAN GS
Citation
Gs. Tian, THE ETA-PAIRING GROUND-STATES IN THE NEGATIVE-U HUBBARD-MODEL ARE SUPERSOLID, Physics letters. A, 192(2-4), 1994, pp. 278-284
Citations number
29
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
192
Issue
2-4
Year of publication
1994
Pages
278 - 284
Database
ISI
SICI code
0375-9601(1994)192:2-4<278:TEGITN>2.0.ZU;2-W
Abstract
Since Yang [Phys. Rev. Lett 63 (1989) 21441 proposed the possible exis tence of the eta-pairing off-diagonal long-range order (ODLRO) in the ground states of the negative-U Hubbard model, this problem has been s tudied by many physicists. In this article, based on our previous work , we shall rigorously show that all the ground states, which have the eta-pairing ODLRO, are actually supersolid rather than superfluid as o ne expected before.