Local magnetic properties of periodic nonuniform spin-1/2 XX chains

[摘要] Using the Jordan-Wigner fermionization, Green function approach and continued fractions, we examine rigorously the local magnetizations and the local static susceptibilities of the spin-1/2 XX chain in a transverse field with regularly varying exchange interactions. We discuss our frndings from the viewpoint of the strong-coupling approach. (C) 2000 Elsevier Science B.V. All rights reserved.

[发布日期] 2000-12-01

[关键词] spin 1/2 XX chain in a transverse field;periodically modulated exchange interactions;magnetization;susceptibility;strong-coupling approach