Finite-size scaling with respect to interaction and disorder strength at the many-body localization transition

Kazue Kudo, Tetsuo Deguchi

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We present a finite-size scaling for both interaction and disorder strengths in the critical regime of the many-body localization (MBL) transition for a spin-1/2XXZ spin chain with a random field by studying level statistics. We show how the dynamical transition from the thermal to MBL phase depends on interaction together with disorder by evaluating the ratio of adjacent level spacings, and thus, extend previous studies in which interaction coupling is fixed. We introduce an extra critical exponent in order to describe the nontrivial interaction dependence of the MBL transition. It is characterized by the ratio of the disorder strength to the power of the interaction coupling with respect to the extra critical exponent and not by the simple ratio between them.

本文言語English
論文番号220201
ジャーナルPhysical Review B
97
22
DOI
出版ステータスPublished - 2018 6 5
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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