Structural transition in Mo3Sb7 probed by muon spin relaxation

Longitudinal-field muSR measurements have been made for Mo3Sb7 focusing on the nature of the structural transition recently found at. Taking account of a critical behavior of the relaxation rate lambda at TS, together with the motional narrowing of the nuclear dipolar field revealed in a zero-field...

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Bibliographic Details
Main Authors: TABATA, Y, KOYAMA, T, KOHARA, T, WATANABE, I, NAKAMURA, H
Format: Conference Proceeding
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.)
Superconductivity
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Summary:Longitudinal-field muSR measurements have been made for Mo3Sb7 focusing on the nature of the structural transition recently found at. Taking account of a critical behavior of the relaxation rate lambda at TS, together with the motional narrowing of the nuclear dipolar field revealed in a zero-field experiment, and the tetragonal lattice symmetry lowering below TS, we propose long-range order of spin-singlet dimers, i.e., the formation of the valence bond crystal below TS. As a possible origin, the frustration in the interdimer antiferromagnetic interaction is suggested.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2008.11.183