Fermi surface investigation of the filled skutterudite LaRu4As12
Fermi surface investigation of the filled skutterudite LaRu4As12
Klotz, J.; Götze, K.; Lorenz, V.; Prots, Y.; Rosner, H.; Harima, H.; Bochenek, L.; Henkie, Z.; Cichorek, T.; Sheikin, I.; Wosnitza, J.
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.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
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Physical Review B 100(2019), 205106
DOI: 10.1103/PhysRevB.100.205106
Cited 4 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-30424