2-DIMENSIONAL T-J MODEL AT LOW ELECTRON-DENSITY

被引：26

作者：

HELLBERG, CS

MANOUSAKIS, E

机构：

[1] Department of Physics, Florida State University, Tallahassee

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.52.4639

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase diagram of the two-dimensional t-J model is determined accurately at low electron density by a combination of analytic and numerical techniques. The ground state exhibits three phases in the limit of aero-electron density: an unpaired state at small J/t, a gas of s-wave pairs for 2 < J/t less than or similar to 3.4367, and a phase-separated state at larger interaction strengths. Bound states of larger clusters are never realised, and the instabilities present at small densities are discussed.

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页码：4639 / 4642

页数：4

相关论文

共 25 条

[1] 2-HOLE D-WAVE BINDING IN THE PHYSICAL REGION OF THE T-J MODEL - A GREENS-FUNCTION MONTE-CARLO STUDY [J].

BONINSEGNI, M ;

MANOUSAKIS, E .

PHYSICAL REVIEW B, 1993, 47 (18) :11897-11904

[2] GREEN-FUNCTION MONTE-CARLO STUDY OF THE T-J MODEL [J].

BONINSEGNI, M ;

MANOUSAKIS, E .

PHYSICAL REVIEW B, 1992, 46 (01) :560-563

[3] GROUND-STATE AND LOW-LYING EXCITATIONS OF THE HEISENBERG-ANTIFERROMAGNET [J].

CARLSON, J .

PHYSICAL REVIEW B, 1989, 40 (01) :846-849

[4] NEW PHASE IN THE ONE-DIMENSIONAL T-J MODEL [J].

CHEN, YC ;

LEE, TK .

PHYSICAL REVIEW B, 1993, 47 (17) :11548-11551

[5] SPIN-CHARGE SEPARATION IN THE 2-DIMENSIONAL HUBBARD AND T-J MODELS AT LOW ELECTRONIC DENSITY [J].

CHEN, YC ;

MOREO, A ;

ORTOLANI, F ;

DAGOTTO, E ;

LEE, TK .

PHYSICAL REVIEW B, 1994, 50 (01) :655-658

[6] NOVEL-GROUND-STATE PROPERTIES OF THE 2-DIMENSIONAL T-J MODEL AT LOW-DENSITY [J].

CHEN, YC ;

LEE, TK .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1994, 95 (01) :5-8

[7] KOHN-LUTTINGER EFFECT AND THE INSTABILITY OF A 2-DIMENSIONAL REPULSIVE FERMI-LIQUID AT T = 0 [J].

CHUBUKOV, AV .

PHYSICAL REVIEW B, 1993, 48 (02) :1097-1104

[8] SUPERCONDUCTIVITY NEAR PHASE-SEPARATION IN MODELS OF CORRELATED ELECTRONS [J].

DAGOTTO, E ;

RIERA, J ;

CHEN, YC ;

MOREO, A ;

NAZARENKO, A ;

ALCARAZ, F ;

ORTOLANI, F .

PHYSICAL REVIEW B, 1994, 49 (05) :3548-3565

[9] CORRELATED ELECTRONS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

DAGOTTO, E .

REVIEWS OF MODERN PHYSICS, 1994, 66 (03) :763-840

[10] PHASE-SEPARATION IN THE T-J MODEL [J].

EMERY, VJ ;

KIVELSON, SA ;

LIN, HQ .

PHYSICAL REVIEW LETTERS, 1990, 64 (04) :475-478