SUPERCONDUCTIVITY IN A REPULSIVELY INTERACTING 2-BAND FERMI GAS

被引：20

作者：

KUROKI, K

AOKI, H

机构：

[1] Department of Physics, University of Tokyo, Hongo

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.72.2947

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The phase diagram of the two-band Fermi gas with repulsive intraband and interband interactions is obtained with the bosonization technique. In the forward-scattering model, there is a region for the superconductivity (SC) within a band due to charge fluctuations in the accompanying band. When the backward scattering is relevant the SC region becomes wider, while when the umklapp scattering is relevant the system is renormalized into two independent single bands, which is considered to cover the regime where superconductivity a la single-band attractive Hubbard model is found from quantum Monte Carlo results in the multiband model on discrete lattices.

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页码：2947 / 2950

页数：4

相关论文

共 24 条

[11] SUPERCONDUCTIVITY IN TRANSITION METALS [J].

KONDO, J .

PROGRESS OF THEORETICAL PHYSICS, 1963, 29 (01) :1-9

[12] REALIZATION OF NEGATIVE-U SUPERCONDUCTIVITY IN A CLASS OF PURELY REPULSIVE SYSTEMS - INTERACTING CARRIER AND INSULATING BANDS [J].

KUROKI, K ;

AOKI, H .

PHYSICAL REVIEW LETTERS, 1992, 69 (26) :3820-3823

[13] SUPERCONDUCTIVITY IN METAL-INSULATOR COMPOSITE BANDS - A REALIZATION OF NEGATIVE-U PAIRING IN PURELY REPULSIVE SYSTEMS [J].

KUROKI, K ;

AOKI, H .

PHYSICAL REVIEW B, 1993, 48 (10) :7598-7617

[14] 2-DIMENSIONAL NEGATIVE-U HUBBARD-MODEL [J].

MOREO, A ;

SCALAPINO, DJ .

PHYSICAL REVIEW LETTERS, 1991, 66 (07) :946-948

[15] SOLVABLE 2-BAND MODEL OF FERMIONS [J].

MUTTALIB, KA ;

EMERY, VJ .

PHYSICAL REVIEW LETTERS, 1986, 57 (11) :1370-1373

[16]

NAGAOSA N, IN PRESS SOLID STATE

[17] PHASE-DIAGRAM OF THE ONE-DIMENSIONAL T-J MODEL [J].

OGATA, M ;

LUCHINI, MU ;

SORELLA, S ;

ASSAAD, FF .

PHYSICAL REVIEW LETTERS, 1991, 66 (18) :2388-2391

[18] SCALING THEORY OF INTERACTING LIGHT AND HEAVY FERMIONS IN ONE DIMENSION [J].

PENC, K ;

SOLYOM, J .

PHYSICAL REVIEW B, 1990, 41 (01) :704-716

[19] CHARGE FLUCTUATION AND SUPERCONDUCTIVITY IN THE ONE-DIMENSIONAL D-P MODEL [J].

SANO, K ;

ONO, Y .

PHYSICA C, 1993, 205 (1-2) :170-176

[20] CORRELATION EXPONENTS AND THE METAL-INSULATOR-TRANSITION IN THE ONE-DIMENSIONAL HUBBARD-MODEL [J].

SCHULZ, HJ .

PHYSICAL REVIEW LETTERS, 1990, 64 (23) :2831-2834