Fermi surface studies of the skutterudite superconductors LaPt4Ge12 and PrPt4Ge
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Bergk, B.; Klotz, J.; Förster, T.; Gumeniuk, R.; Leithe-Jasper, A.; Lorenz, V.; Schnelle, W.; Nicklas, M.; Rosner, H.; Grin, Y.; Wosnitza, J.

doi:10.1103/PhysRevB.99.245115

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Fermi surface studies of the skutterudite superconductors LaPt₄Ge₁₂ and PrPt₄Ge₁₂

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Gumeniuk, R.
Roman Gumeniuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Leithe-Jasper, A.
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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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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Schnelle, W.
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Nicklas, M.
Michael Nicklas, Physics of Quantum Materials, 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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Grin, Y.
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Bergk, B., Klotz, J., Förster, T., Gumeniuk, R., Leithe-Jasper, A., Lorenz, V., et al. (2019). Fermi surface studies of the skutterudite superconductors LaPt₄Ge₁₂ and PrPt₄Ge₁₂. Physical Review B, 99(24): 245115, pp. 1-6. doi:10.1103/PhysRevB.99.245115.

Cite as: https://hdl.handle.net/21.11116/0000-0003-DF95-A

Abstract

We report on comprehensive de Haas-van Alphen (dHvA) and electronic band-structure studies of the superconducting skutterudites LaPt4Ge12 (T-c= 8.3 K) and PrPt4Ge12(T-c = 7.9 K). Both materials show very rich spectra of dHvA oscillations with similar and only slightly varying angular-dependent frequencies. The spectral richness can partly be rationalized by the elaborated electronic band structures resulting in several Fermi surfaces built by six different bands. The effective cyclotron masses of both superconductors lie between about 0.5 and 1.1 times the free-electron mass. Although these values are small, we find moderate mass enhancements between about 2 and 4 when comparing to the calculated masses. Our results evidence the localized character of the 4f electrons in the Pr compound and are in line with an electron-phonon mediated multiband superconductivity, largely identical for both compounds.