PHASE-TRANSITIONS IN THE SYMMETRICAL KONDO-LATTICE MODEL IN 2 AND 3 DIMENSIONS

被引：43

作者：

SHI, ZP

SINGH, RRP

GELFAND, MP

WANG, ZQ

机构：

[1] COLORADO STATE UNIV, DEPT PHYS, FT COLLINS, CO 80523 USA

[2] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.51.15630

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an application of high-order series expansion in the coupling constants for the ground-state properties of correlated lattice fermion systems. Expansions have been generated up to order (t/J)14 for d=1 and (t/J)8 for d=2,3 for certain properties of the symmetric Kondo-lattice model. Analyzing the susceptibility series, we find evidence for a continuous phase transition from the spin-liquid phase characteristic of a Kondo insulator to an antiferromagnetically ordered phase in dimensions d2 as the antiferromagnetic Kondo coupling is decreased. The critical point is estimated to be at (t/J)c0.7 for a square lattice and (t/J)c0.5 for a simple-cubic lattice. © 1995 The American Physical Society.

引用

页码：15630 / 15633

页数：4

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