Finite-temperature scaling of spin correlations in an experimental realization of the one-dimensional Ising quantum critical point

TL;DR

This study investigates the finite-temperature scaling of spin correlations at a quantum critical point in a quasi-one-dimensional antiferromagnet, testing theoretical predictions through neutron scattering experiments.

Contribution

It provides experimental validation and analysis of the scaling relations near the Ising quantum critical point in a real material.

Findings

Confirmed the validity of theoretical scaling relations at the quantum critical point

Identified limitations of the scaling predictions in experimental conditions

Enhanced understanding of quantum critical behavior in low-dimensional magnets

Abstract

Inelastic neutron scattering is used to study the finite-temperature scaling behavior of the local dynamic structure factor in the quasi-one-dimensional quantum antiferromagnet NTENP ($\text{Ni(N,N'-bis(3-aminopropyl)propane-1,3-diamine)(}\mu\text{-NO}_2\text{)ClO}_4$), at its field-induced Ising quantum critical point. The validity and the limitations of the theoretically predicted scaling relations are tested.