FINITE-SIZE-SCALING STUDY OF THE GAP FORMATION IN THE KONDO-NECKLACE MODEL

被引：23

作者：

SANTINI, P

SOLYOM, J

机构：

[1] Institut de Physique Théorique, Université de Lausanne, CH-1015 Lausanne, Dorigny

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.46.7422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The "Kondo-necklace" model is studied by exact numerical diagonalization on finite chains up to N = 12 sites. The gap extrapolated to infinite systems can be well fitted by a Kosterlitz-Thouless-like form with a critical coupling (J/W)c = 0.24. Although this value is appreciably smaller than the best estimate from real-space renormalization, our results indicate strongly a finite critical coupling in contrast to the one-dimensional Kondo lattice.

引用

页码：7422 / 7426

页数：5

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