EXACT SOLUTION OF A HUBBARD CHAIN WITH BOND-CHARGE INTERACTION

被引：132

作者：

ARRACHEA, L

ALIGIA, AA

机构：

[1] COMIS NACL ENERGIA ATOM,INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA

[2] UNIV NACL LA PLATA,DEPT FIS,RA-1900 LA PLATA,ARGENTINA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.73.2240

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We obtain the exact solution of a general Hubbard chain with kinetic energy t, bond-charge interaction X, and on-site repulsion U with the only restriction t = X. At zero temperature and half filling, the model exhibits a Mott transition at U = 4t. In the metallic phase and near half filling, superconducting states are part of the degenerate ground state and are favored for small LI if the system is slightly perturbed.

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页码：2240 / 2243

页数：4

相关论文

共 29 条

[21] 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

[22]

Ovchinnikov A. A., 1993, Modern Physics Letters B, V7, P1397, DOI 10.1142/S0217984993001442

[23] MOTT-HUBBARD TRANSITION IN INFINITE DIMENSIONS [J].

ROZENBERG, MJ ;

ZHANG, XY ;

KOTLIAR, G .

PHYSICAL REVIEW LETTERS, 1992, 69 (08) :1236-1239

[24] BRINKMAN-RICE TRANSITION IN LAYERED PEROVSKITES [J].

SIMON, ME ;

ALIGIA, AA .

PHYSICAL REVIEW B, 1993, 48 (10) :7471-7477

[25] SEMIMETAL INSULATOR TRANSITION OF THE HUBBARD-MODEL IN THE HONEYCOMB LATTICE [J].

SORELLA, S ;

TOSATTI, E .

EUROPHYSICS LETTERS, 1992, 19 (08) :699-704

[26] EXACT GROUND-STATE ENERGY OF THE PERIODIC ANDERSON MODEL IN D=1 AND EXTENDED EMERY MODELS IN D=1,2 FOR SPECIAL PARAMETER VALUES [J].

STRACK, R .

PHYSICAL REVIEW LETTERS, 1993, 70 (06) :833-836

[27] HUBBARD-MODEL WITH NEAREST-NEIGHBOR AND BOND-CHARGE INTERACTION - EXACT GROUND-STATE SOLUTION IN A WIDE-RANGE OF PARAMETERS [J].

STRACK, R ;

VOLLHARDT, D .

PHYSICAL REVIEW LETTERS, 1993, 70 (17) :2637-2640

[28] EXACT RESULTS IN THE THEORY OF MAGNETIC-ALLOYS [J].

TSVELICK, AM ;

WIEGMANN, PB .

ADVANCES IN PHYSICS, 1983, 32 (04) :453-713

[29] BETHE ANSATZ STUDY OF 1+1 DIMENSIONAL HUBBARD-MODEL [J].

XIONG, SJ .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 89 (01) :29-34