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

被引：57

作者：

BONINSEGNI, M ^{[1
]}

MANOUSAKIS, E ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,CTR MAT RES & TECHNOL,DEPT PHYS,TALLAHASSEE,FL 32306

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.47.11897

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate numerically the ground state of two holes with dx2-y2 symmetry in the two-dimensional t-J model, on lattices of significantly larger sizes than the ones studied so far. The Green's-function Monte Carlo method, in conjunction with suitable initial states and guidance functions, is used to estimate the ground-state energy of one and two holes, as well as to compute the two-hole distribution function. Our results show a significant decrease of the two-hole binding energy as the size of the lattice is increased from 4 X 4. A critical value J(c) approximately 0.27t is found such that d-wave hole binding no longer occurs for J < J(c).

引用

页码：11897 / 11904

页数：8

共 29 条

[11]

Ceperley D., 1979, MONTE CARLO METHODS

[12] GUIDED RANDOM-WALKS FOR SOLVING HAMILTONIAN LATTICE GAUGE-THEORIES [J].

CHIN, SA ;

NEGELE, JW ;

KOONIN, SE .

ANNALS OF PHYSICS, 1984, 157 (01) :140-165

[13] DYNAMIC PAIR SUSCEPTIBILITIES IN THE T-J AND HUBBARD MODELS [J].

DAGOTTO, E ;

RIERA, J ;

YOUNG, AP .

PHYSICAL REVIEW B, 1990, 42 (04) :2347-2352

[14] STATIC AND DYNAMIC PROPERTIES OF DOPED HUBBARD CLUSTERS [J].

DAGOTTO, E ;

MOREO, A ;

ORTOLANI, F ;

POILBLANC, D ;

RIERA, J .

PHYSICAL REVIEW B, 1992, 45 (18) :10741-10761

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

EMERY, VJ ;

KIVELSON, SA ;

LIN, HQ .

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

[16] HOLE DYNAMICS IN THE T-J MODEL - AN EXACT DIAGONALIZATION STUDY [J].

HASEGAWA, Y ;

POILBLANC, D .

PHYSICAL REVIEW B, 1989, 40 (13) :9035-9043

[17]

KALOS MH, 1962, PHYS REV, V128, P179

[18] MOTION OF A SINGLE HOLE IN A QUANTUM ANTIFERROMAGNET [J].

KANE, CL ;

LEE, PA ;

READ, N .

PHYSICAL REVIEW B, 1989, 39 (10) :6880-6897

[19] HOLE DYNAMICS IN THE TWO-DIMENSIONAL STRONG-COUPLING HUBBARD HAMILTONIAN [J].

KAXIRAS, E ;

MANOUSAKIS, E .

PHYSICAL REVIEW B, 1988, 38 (01) :866-869

[20] SPECTRAL-FUNCTION OF A HOLE IN THE T-J MODEL [J].

LIU, ZP ;

MANOUSAKIS, E .

PHYSICAL REVIEW B, 1991, 44 (05) :2414-2417

← 1 2 3 →