1/N EXPANSION AND LONG-RANGE ANTIFERROMAGNETIC ORDER

被引：6

作者：

RAYKIN, M

AUERBACH, A

机构：

[1] TECHNION ISRAEL INST TECHNOL,IL-32000 HAIFA,ISRAEL

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

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.70.3808

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The staggered magnetization of the Heisenberg antiferromagnet in two dimensions can be systematically approximated by a 1/N expansion. Cancellation between self-energy diagrams leads to a Luttinger-like theorem for the ground state. We prove (for a smooth enough self-energy) that the long range order of mean field theory (N=infinity) survives corrections to all orders of 1/N. Divergences of this series provide a new route to the disordered phases of quantum antiferromagnets.

引用

页码：3808 / 3811

页数：4

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