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

被引：9
|
作者：
TIAN, GS [1 ]
机构：
[1] ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
来源：
PHYSICS LETTERS A | 1994年 / 192卷 / 2-4期
关键词：
D O I：
10.1016/0375-9601(94)90258-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Since Yang [Phys. Rev. Lett 63 (1989) 21441 proposed the possible existence of the eta-pairing off-diagonal long-range order (ODLRO) in the ground states of the negative-U Hubbard model, this problem has been studied 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 one expected before.
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页码：278 / 284
页数：7
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