Many-body localization in random-anisotropy S=1 chain and possible realization in doped organo-metallic quantum magnets
Jie Gu, Hai-Ping Cheng, Xiaoguang Zhang
Department of Physics and the Quantum Theory Project, University of Florida, Gainesville, FL 32611
Observing many-body localization (MBL) in natural solid-state materials is still lacking, where one of the difficulties is to create large enough disorder. Instead of using strongly random magnetic fields to realize MBL as in previous works, we propose exploiting large random magnetic anisotropy, which can be easily realized experimentally by doping. We present the phase diagram of an $S = 1$ Heisenberg chain with random magnetic anisotropy in random magnetic fields. We argue that it is promising to realize MBL in doped organo-metallic quantum magnets, where substituting metal ions can create large random magnetic anisotropy, and candidate compounds are proposed.