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Journal Article

Fermi surface investigation of the filled skutterudite LaRu4As12

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Lorenz,  V.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Prots,  Yu.
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Rosner,  H.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Klotz, J., Götze, K., Lorenz, V., Prots, Y., Rosner, H., Harima, H., et al. (2019). Fermi surface investigation of the filled skutterudite LaRu4As12. Physical Review B, 100(20): 205106, pp. 1-8. doi:10.1103/PhysRevB.100.205106.


Cite as: https://hdl.handle.net/21.11116/0000-0005-4D78-F
Abstract
Of all stoichiometric filled-skutterudite superconductors, LaRu4As12 has the highest critical field and temperature. Here we report on a detailed Fermi-surface investigation of LaRu4As12 by means of de Haas-van Alphen measurements and density-functional-theory calculations. We find evidence for a nearly spherical and a multiply connected Fermi-surface sheet. The different effective masses and mass enhancements for the two sheets support two-band superconductivity, which was inferred from previous specific-heat measurements. Furthermore, quantum oscillations persist as well in the superconducting phase. We use two models to describe the additional damping, yielding energy gaps differing by a factor of 5.