Pressure-induced valence instability in Sm4Bi3 |
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| Authors: | A. Jayaraman R.G. Maines E. Bucher |
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| Affiliation: | Bell Laboratories Murray Hill, NJ 07974, USA;University of Konstanz Department of Physics D-7750 Konstanz, Federal Republic of Germany |
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| Abstract: | Sm4Bi3 has the anti-Th3P4 (cubic) structure with three Sm2+ ions and one Sm3+ ion. The compound undergoes a first-order, isostructural transition at about 26 kbar. The resistance abruptly decreases by a factor of three and the volume by about 10%. The Sm2+ ions undergo a change towards the 3+ state in the transition and the material goes from semimetallic to a metallic state. The behavior of the resistance anomaly suggests termination of the phase boundary at a critical point. |
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