Fermi surface studies of the skutterudite superconductors LaPt4Ge12 and PrPt4Ge12

B. Bergk, J. Klotz, T. Förster, R. Gumeniuk, A. Leithe-Jasper, V. Lorenz, W. Schnelle, M. Nicklas, H. Rosner, Y. Grin, and J. Wosnitza
Phys. Rev. B 99, 245115 – Published 10 June 2019

Abstract

We report on comprehensive de Haas–van Alphen (dHvA) and electronic band-structure studies of the superconducting skutterudites LaPt4Ge12 (Tc=8.3 K) and PrPt4Ge12 (Tc=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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 28 March 2019

DOI:https://doi.org/10.1103/PhysRevB.99.245115

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

B. Bergk1,*, J. Klotz1,2, T. Förster1, R. Gumeniuk3, A. Leithe-Jasper3, V. Lorenz3, W. Schnelle3, M. Nicklas3, H. Rosner3, Y. Grin3, and J. Wosnitza1,2

  • 1Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
  • 2Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany
  • 3Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany

  • *Present address: Institut für Werkstoffwissenschaft, TU Dresden, 01062 Dresden, Germany.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 24 — 15 June 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×