Dissemin is shutting down on January 1st, 2025

Published in

Institute for Condensed Matter Physics, Condensed Matter Physics, 1(26), p. 13102, 2023

DOI: 10.5488/cmp.26.13102

Links

Tools

Export citation

Search in Google Scholar

Random Ising chain in transverse and longitudinal fields: Strong disorder RG study

Journal article published in 2023 by T. Pető, F. Iglói ORCID, I. A. Kovács ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Question mark in circle
Preprint: policy unknown
Question mark in circle
Postprint: policy unknown
Question mark in circle
Published version: policy unknown
Data provided by SHERPA/RoMEO

Abstract

Motivated by the compound LiHoxY1-xF4, we consider the Ising chain with random couplings and in the presence of simultaneous random transverse and longitudinal fields, and study its low-energy properties at zero temperature by the strong disorder renormalization group approach. In the absence of longitudinal fields, the system exhibits a quantum-ordered and a quantum-disordered phase separated by a critical point of infinite disorder. When the longitudinal random field is switched on, the ordered phase vanishes and the trajectories of the renormalization group are attracted to two disordered fixed points: one is characteristic of the classical random field Ising chain, the other describes the quantum disordered phase. The two disordered phases are separated by a separatrix that starts at the infinite disorder fixed point and near which there are strong quantum fluctuations.