NMR relaxation rate in the field-induced octupolar liquid phase of spin-1/2 J1-J2 frustrated chains

TL;DR

This paper investigates the NMR relaxation rate in the octupolar liquid phase of spin-1/2 J1-J2 frustrated chains under magnetic field, combining theoretical and numerical methods to understand its behavior.

Contribution

It provides the first detailed analysis of the NMR relaxation rate in the octupolar phase using combined field theory and numerical data.

Findings

Characterized the temperature and field dependence of 1/T_1 in the octupolar phase.

Linked theoretical results to experimental quasi-one-dimensional J1-J2 magnets.

Extended understanding of multipolar-liquid phases in frustrated spin chains.

Abstract

In the spin-1/2 frustrated chain with nearest-neighbor ferromagnetic exchange J1 and next-nearest-neighbor antiferromagnetic exchange J2 under magnetic field, magnetic multipolar-liquid (quadrupolar, octupolar, and hexadecapolar) phases are widely expanded from the saturation down to a low-field regime. Recently, we have clarified characteristic temperature and field dependence of the NMR relaxation rate 1/T_1 in the quadrupolar phase. In this paper, we examine those of 1/T_1 in the octupolar phase combining field theoretical method with numerical data. The relevance of the results to quasi one-dimensional J1-J2 magnets such as PbCuSO4(OH)2, Rb2Cu2Mo3O12 and Li2ZrCuO4 is shortly discussed.