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Mechanism of Ground State Selection in the Frustrated Molecular Spin Cluster V15 | | G. Chaboussant
; S.T. Ochsenbein
; A. Sieber
; H.-U. Guedel
; H. Mutka
; A. Mueller
; B. Barbara
; | | Date: |
29 Dec 2003 | | Journal: | Europhysics Letters, vol 66, pp 423-429 (2004) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | We report an inelastic neutron scattering (INS) study under a magnetic field on the frustrated molecular spin cluster $V_{15}$. Several field-dependent transitions are observed and provide a comprehensive understanding of the low-energy quantum spin states. The energy gap $2 Delta_{0}approx 27(3)mu$eV between the two lowest $S=1/2$ Kramers doublets is unambiguously attributed to a symmetry lowering of the cluster. The INS data are mapped onto an S=1/2 Antiferromagnetic Heisenberg triangle with scalene distortion. A quantitative description of the wavefunction mixing within the ground state is derived. | | Source: | arXiv, cond-mat/0401614 | | Services: | Forum | Review | PDF | Favorites | |
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