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25 April 2024 |
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Frustration-induced valence bond crystal and its melting in Mo3Sb7 | | T. Koyama
; H. Yamashita
; Y. Takahashi
; T. Kohara
; I. Watanabe
; Y. Tabata
; H. Nakamura
; | | Date: |
26 May 2008 | | Abstract: | 121/123Sb nuclear quadrupole resonance and muon spin relaxation experiments
of Mo3Sb7 revealed symmetry breakdown to a nonmagnetic state below the
transition recently found at TS=50 K. The transition is characterized by a
distinct lattice dynamics suggested from narrowing of nuclear fields. We point
out that the Mo sublatice is a unique three-dimensional frustrated lattice
where nearest-neighbor and next-nearest-neighbor antiferromagnetic interactions
compete, and propose that tetragonal distortion to release the frustration
stabilizes long-range order of spin-singlet dimers, i.e., valence bond crystal,
which is thermally excited to the dynamic state with cubic symmetry. | | Source: | arXiv, 0805.3892 | | Services: | Forum | Review | PDF | Favorites | |
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