Suppression of dimer correlations in the two-dimensional J1-J2 Heisenberg model:: An exact diagonalization study -: art. no. 212402

被引：38

作者：

Capriotti, L ^{[1
]}

Becca, F

Parola, A

Sorella, S

机构：

[1] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

[2] Univ Lausanne, Inst Phys Theor, CH-1015 Lausanne, Switzerland

[3] Univ Insubria, Ist Nazl Fis Mat, I-22100 Como, Italy

[4] Univ Insubria, Dipartimento Sci, I-22100 Como, Italy

[5] Natl Simulat Ctr, INFM Democritos, I-34014 Trieste, Italy

[6] SISSA, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.67.212402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an exact diagonalization study of the ground state of the spin-half J(1)-J(2) model. Dimer correlation functions and the susceptibility associated to the breaking of the translational invariance are calculated for the 4x4 and the 6x6 clusters. These results-especially when compared to the one-dimensional case, where the occurrence of a dimerized phase for large enough frustration is well established-suggest either a homogeneous spin liquid or, possibly, a dimerized state with a rather small order parameter.

引用

页数：4

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