Fermi surface and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3

Yoshihiko Inada, Hiroshi Yamagami, Yoshinori Haga, Kenji Sakurai, Yoshihumi Tokiwa, Tetsuo Honma, Etsuji Yamamoto, Yoshichika Onuki, Takashi Yanagisawa

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The dHvA oscillation was observed clearly in both the normal and superconducting mixed states for UPd2Al3 with the hexagonal structure. Eight kinds of dHvA branches were detected, which are well explained by the results of band calculations based on a fully-relativistic spin-polarized LAPW method. An inner orbit of a band 41-hole Fermi surface, named ζ, has the largest dHvA frequency of 9.45 × 107 Oe and cyclotron mass of 65 m0, reflecting a large electronic specific heat coefficient of 145 mJ/K2·mol. Branch α of a band 40-hole Fermi surface was observed in both the normal and superconducting mixed states, where the dHvA frequency does not change in magnitude between the normal and mixed states. The cyclotron effective mass of branch α is, however, found to be reduced and the corresponding Dingle temperature or scattering rate of the conduction electron increases with decreasing the field in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 is discussed from the angular dependence of the dHvA amplitude in the mixed state.

Original languageEnglish
Pages (from-to)3643-3654
Number of pages12
Journaljournal of the physical society of japan
Volume68
Issue number11
DOIs
Publication statusPublished - Nov 1999
Externally publishedYes

Keywords

  • Fermi surface
  • LAPW
  • Mixed state
  • Superconductivity
  • UPdAl
  • dHvA

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Inada, Y., Yamagami, H., Haga, Y., Sakurai, K., Tokiwa, Y., Honma, T., Yamamoto, E., Onuki, Y., & Yanagisawa, T. (1999). Fermi surface and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3. journal of the physical society of japan, 68(11), 3643-3654. https://doi.org/10.1143/JPSJ.68.3643