Jahn-Teller band transition in La3S4 and La3Se4 |
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Authors: | K. Westerholt H. Bach S. Methfessel |
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Affiliation: | Institut für Experimentalphysik IV, Ruhr-Universität Bochum, D463 Bochum, West Germany |
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Abstract: | La3S4 and La3Se4 undergo a cubic to tetragonal phase transformation at a temperature of 103 and 70 K respectively, the c/a ratio is 0.984 for La3S4 and 0.987 for La3Se4. In these compounds the conduction electron Fermi energy happens to be close to a band structure anomaly which drives the phase transition. We find some indication, that the anomaly might be of ?-type. |
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