Erratum: Dynamics and scaling in a quantum spin chain material with bond randomness

TL;DR

This paper clarifies previous neutron measurement results on BaCu2SiGeO7, showing that its magnetic excitations are similar to those in disorder-free quantum chains after correcting earlier data analysis errors.

Contribution

It provides a corrected analysis of neutron data, demonstrating that bond randomness does not significantly alter magnetic excitations in this quantum spin chain material.

Findings

Magnetic excitations are indistinguishable from disorder-free chains after correction.

Previous analysis was affected by background and data reduction errors.

Updated data confirms the robustness of quantum spin chain behavior.

Abstract

Follow-up neutron measurements, performed on a sample much larger than the one used in the original study, show that in the energy range 0.5-45 meV the magnetic excitations in BaCu2SiGeO7 are indistinguishable from those in conventional (disorder-free) quantum S=1/2 chains. Scrutinizing the previous data, we found that the analysis was affected by a poorly identified structured background and an additional technical mistake in the data reduction.