Tracking the Effects of Interactions on Spinons in Gapless Heisenberg Chains

被引：16
|
作者：
Caux, Jean-Sebastien [1 ]
Konno, Hitoshi [2 ]
Sorrell, Mark [3 ]
Weston, Robert [4 ]
机构：
[1] Univ Amsterdam, Inst Theoret Phys, NL-1018 XE Amsterdam, Netherlands
[2] Hiroshima Univ, Dept Math, Higashihiroshima 7398521, Japan
[3] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia
[4] Heriot Watt Univ, Dept Math, Edinburgh EH14 4AS, Midlothian, Scotland
来源：
PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 21期
基金：
澳大利亚研究理事会;
关键词：
DYNAMIC STRUCTURE FACTOR; FREE-FIELD CONSTRUCTION; 8-VERTEX MODEL; NEAREST-NEIGHBOR; MAGNETIC-FIELD; XXZ MODEL; ANTIFERROMAGNET; LATTICE;
D O I：
10.1103/PhysRevLett.106.217203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider the effects of interactions on spinon excitations in Heisenberg spin-1/2 chains. We compute the exact two-spinon part of the longitudinal structure factor of the infinite chain in zero field for all values of anisotropy in the gapless antiferromagnetic regime, via an exact algebraic approach. Our results allow us to quantitatively describe the behavior of these fundamental excitations throughout the observable continuum, for cases ranging from free to fully coupled chains, thereby explicitly mapping the effects of "turning on the interactions" in a strongly correlated system.
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页数：4
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