Magnetization of a Gapped Spin 1/2 Antiferromagnetic Ising Chain near the Critical External Field  

作　　者：LIU Yi-Chang CHEN Yu-Guan LOU Ji-Zhong QIN Shao-Jin CHEN Hong 

机构地区：[1]Institute of Theoretical Physics, P.O. Box 2735, Beijing 100080, China Department of Physics, Tongji University, Shanghai 200092, China Department of Physics, University of Nevada, Las Vegas, NV 89154, USA Institute of Theoretical Physics, P.O. Box 2735, Beijing 100080, China [2]Department of Physics, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan Department of Physics, Tongji University, Shanghai 200092, China

出　　处：《Communications in Theoretical Physics》2001年第12期733-736,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：We study the magnetization of gapped spin 1/2 XXZ Heisenberg Ising chains and calculate the scattering length among massive spinons. We obtain the magnetization close to the critical external magnetic field. The leading correction term determined by the scattering length among massive spinons is given. Our results are in agreement with exact results and with experimental results. We show that the deviation from the massive free hard core boson picture can be accounted very well by the leading correction term due to the spinon-spinon interaction. We show that the deviation increases along with the increasing of the Ising term.

关 键 词：magnetization  XXZ SPIN 1/2 chain  spinon-spinon scattering length 

分 类 号：O4[理学—物理]