Antiferromagnetism in a doped spin-Peierls model: classical and quantum behaviors

TL;DR

This paper investigates antiferromagnetic behavior in a doped spin-Peierls system using classical and quantum models, revealing how doping influences magnetic ordering and susceptibility at different levels.

Contribution

It provides a Bethe-Peierls solution for the classical model and applies cluster renormalization group to the quantum model, offering new insights into doping effects.

Findings

Classical model shows ordering temperature proportional to doping

Quantum model exhibits finite randomness and low-temperature antiferromagnetic susceptibility

Doping significantly affects magnetic properties in the system

Abstract

We address the problem of antiferromagnetism in a two dimensional model of doped spin-Peierls system, at the classical and quantum levels. A Bethe-Peierls solution is derived for the classical model, with an ordering temperature proportional to the doping concentration. The quantum model is treated in a cluster renormalization group showing a finite randomness behavior and an antiferromagnetic susceptibility at low temperature.