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

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

doi:10.1103/PhysRevLett.93.077206

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 journal › Article › peer-review

22 Citations (Scopus)

Abstract

The dynamic spin correlations in the quasi-one-dimensional quantum antiferromagnet BaCu₂(Si_0.5Ge_0.5)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 language	English
Article number	077206
Pages (from-to)	077206-1-077206-4
Journal	Physical review letters
Volume	93
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.93.077206
Publication status	Published - 2004 Aug 13
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.93.077206

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title = "Dynamics and scaling in a quantum spin chain material with bond randomness",

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 M{\"u}ller 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.",

author = "T. Masuda and A. Zheludev and K. Uchinokura and Chung, {J. H.} and S. Park",

note = "Funding Information: We thank I. Tsukada for his participation in an early stage of this project. Work at ORNL was carried out under Contract No. DE-AC05-00OR22725, U.S. Department of Energy. Experiments at NIST were partially supported by the NSF through DMR-0086210 and DMR-9986442.",

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doi = "10.1103/PhysRevLett.93.077206",

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T1 - Dynamics and scaling in a quantum spin chain material with bond randomness

AU - Masuda, T.

AU - Zheludev, A.

AU - Uchinokura, K.

AU - Chung, J. H.

AU - Park, S.

N1 - Funding Information: We thank I. Tsukada for his participation in an early stage of this project. Work at ORNL was carried out under Contract No. DE-AC05-00OR22725, U.S. Department of Energy. Experiments at NIST were partially supported by the NSF through DMR-0086210 and DMR-9986442.

PY - 2004/8/13

Y1 - 2004/8/13

N2 - 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.

AB - 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.

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

Abstract

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