Magnetization process and updated phase diagram of one-dimensional S=1 Ising model with single-ion anisotropy under magnetic field

Guang-HuaLiuaWeiLibWen-LongYoucGangSudGuang-ShanTiane
aDepartment of Physics, Tianjin Polytechnic University, Tianjin 300387, China
bDepartment of Physics, Beihang University, Beijing 100191, China
cSchool of Physical Science and Technology, Soochow University, Suzhou, Jiangsu 215006, China
dTheoretical Condensed Matter Physics and Computational Materials Physics Laboratory, College of Physical Sciences, Graduate University of Chinese Academy of Sciences, P.O. Box 4588, Beijing 100049, China
eSchool of Physics, Peking University, Beijing 100871, China

Received 20 February 2013, Revised 20 April 2013, Accepted 26 April 2013, Available online 7 May 2013.

by Prof. F. Peeters

Abstract

By the infinite time-evolving block decimation (iTEBD) technique, the magnetization process in spin-1 Ising model with single-ion anisotropy under external field is investigated in the thermodynamic limit. An updated phase diagram is proposed, and the detailed magnetic structures of the phase diagram are uncovered. It must be noted that two interesting phases with same magnetization plateau (Mz=0) but different magnetic structures are distinguished. Furthermore, they are verified to be an ideal Néel phase and an ideal large-D phase respectively. In addition, a first-order quantum phase transition line between them is determined to be at D=1.

Keywords

D. Exchange and superexchange
D. Phase transitions