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A NEW MODEL FOR THE MIXED VALENCE COMPOUNDS |
| ZHENG Hang |
| Department Applied Physics, Shanghai Jiaotong University,Shanghai |
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| Cite this article: |
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ZHENG Hang 1987 Chin. Phys. Lett. 4 33-36 |
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Abstract The ground-state properties of the Sm-based mixed valence compounds are discussed by means of introducing an indirect on-site hybridization mediated by phonons, for the direct on-site hybridization is forbidden by inversion symmetry. A self-consistent field approximation is used, and a nonzero energy gap and a fluctuating valence state are given. The results obtained can be used to explain the small energy gap and the valence fluctuation phenomena observed in SmB6 and SmS.
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Published: 01 January 1987
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