# Dominance of excitation continuum in the longitudinal spectrum of weakly coupled Heisenberg S=1/2 chains

Source: [Dominance of excitation continuum in the longitudinal spectrum of weakly coupled Heisenberg S=1/2 chains](<https://www.sota2.com/research/paper/68fa25c42c2a3760193b393a>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T10:57:33.405Z

Authors: A. Zheludev, K. Kakurai, T. Masuda, K. Uchinokura, K. Nakajima

Published: 2002-10-25T18:09:27.000Z

## Abstract

A low-field spin flop transition in the quasi one-dimensional antiferromagnet \\ba is exploited to study the polarization dependence of low-energy magnetic excitations. The measured longitudinal spectrum is best described as single broad continuum, with no sharp \`\`longitudinal mode'', in apparent contradiction with the commonly used chain-MF/RPA theories. The observed behavior is also quite different than that previously seen in the related \\kcuf material, presumably due to a large difference in the relative strength of inter-chain interactions. The results highlight the limitations of the chain-MF/RPA approach.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0210568>)

[PDF](<https://arxiv.org/pdf/cond-mat/0210568.pdf>)