Spin gap of the one-dimensional t-J model

被引：0
|
作者：
Chen, YC [1 ]
机构：
[1] Tunghai Univ, Dept Phys, Taichung 407, Taiwan
来源：
PHYSICA C | 2001年 / 364卷
关键词：
spin gap; power-Lanczos method; t-J model;
D O I：
10.1016/S0921-4534(01)00725-0
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We carry out the numerical calculation of the low-energy behavior of the one-dimensional t-J model. The lowest singlet-triplet spin excitations are determined for various couplings J and densities n in the finite chain. The methods we employed in this study include the exact diagonalization for smaller lattice and power-Lanczos method for the larger lattice. The spin gap in the bulk limit is then obtained by finite-size extrapolation. We find the spin-gap region is more extensive in the phase diagram as indicated in the renormalization group analysis. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：113 / 116
页数：4
相关论文
共 50 条
  • [1] SPIN GAP IN A GENERALIZED ONE-DIMENSIONAL T-J MODEL
    OGATA, M
    LUCHINI, MU
    RICE, TM
    [J]. PHYSICAL REVIEW B, 1991, 44 (21): : 12083 - 12085
  • [2] SPIN GAP AND SUPERCONDUCTIVITY IN THE ONE-DIMENSIONAL T-J MODEL WITH COULOMB REPULSION
    TROYER, M
    TSUNETSUGU, H
    RICE, TM
    RIERA, J
    DAGOTTO, E
    [J]. PHYSICAL REVIEW B, 1993, 48 (06): : 4002 - 4013
  • [3] Variational study of the spin-gap phase of the one-dimensional t-J model
    Chen, YC
    Lee, TK
    [J]. PHYSICAL REVIEW B, 1996, 54 (13): : 9062 - 9065
  • [4] CHARGE AND SPIN STRUCTURES IN THE ONE-DIMENSIONAL T-J MODEL
    ASSAAD, FF
    WURTZ, D
    [J]. PHYSICAL REVIEW B, 1991, 44 (06): : 2681 - 2696
  • [5] SPIN AND CHARGE DYNAMICS FOR THE ONE-DIMENSIONAL T-J MODEL
    DEISZ, J
    LUK, KH
    JARRELL, M
    COX, DL
    [J]. PHYSICAL REVIEW B, 1992, 46 (06): : 3410 - 3419
  • [6] Renormalization group analysis of the spin-gap phase in the one-dimensional t-J model
    Nakamura, M
    Nomura, K
    Kitazawa, A
    [J]. PHYSICAL REVIEW LETTERS, 1997, 79 (17) : 3214 - 3217
  • [7] SPIN-GAP STATE AND SUPERCONDUCTING CORRELATIONS IN A ONE-DIMENSIONAL DIMERIZED T-J MODEL
    IMADA, M
    [J]. PHYSICAL REVIEW B, 1993, 48 (01): : 550 - 556
  • [8] SPIN GAP OF THE ONE-DIMENSIONAL T-J-J' MODEL
    SANO, K
    TAKANO, K
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1993, 62 (11) : 3809 - 3812
  • [9] Charge and spin dynamics in the one-dimensional t-J(z) and t-J models
    Zhang, S
    Karbach, M
    Muller, G
    Stolze, J
    [J]. PHYSICAL REVIEW B, 1997, 55 (10) : 6491 - 6503
  • [10] CHARGE-SPIN RECOMBINATION IN THE ONE-DIMENSIONAL SUPERSYMMETRIC T-J MODEL
    BARES, PA
    CARMELO, JMP
    FERRER, J
    HORSCH, P
    [J]. PHYSICAL REVIEW B, 1992, 46 (22): : 14624 - 14654
12345