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

T. Masuda, A. Zheludev, K. Uchinokura, J. H. Chung, S. Park

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The dynamic spin correlations in the quasi-one-dimensional quantum antiferromagnet BaCu2(Si0.5Ge0.5)O7, where the exchange constant fluctuates due to a random distribution of Si and Ge atoms, were analyzed. The measured low-energy spectrum was discussed in the framework of the random singlet model. It was found that the spinon continuum ion the quantum model was approximated using the Müller ansatz function. Analyis shows the observed scaling relations for the frequency dependencies of the correlation length and structure factor were in agreement with theoretical predictions.

Original languageEnglish
Pages (from-to)077206-1-077206-4
JournalPhysical review letters
Volume93
Issue number7
DOIs
Publication statusPublished - 2004 Aug 13
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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