Shubnikov-de Haas effect study of cylindrical fermi surfaces in UP2

Piotr Wiśniewsk, Dai Aoki, Narumi Watanabe, Rikio Settai, Yoshinori Haga, Etsuji Yamamoto, Yoshichika Onuki

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Shubnikov-de Haas effect (SdH) measurements and complementary electrical resistivity and specific heat measurements were performed on a high-quality whisker single crystal of UP2. All except one of detected branches exhibit angular dependences clearly indicating the Fermi surfaces (FS) of cylindrical form. The effective cyclotron masses were determined to range from 1.9 to 9.3 m0, which yields an electronic specific heat coefficient of 25 mJ/K2·mol. This is in good agreement with 27mJ/K2·mol determined directly by the low-temperature specific-heat measurement. As in sister compounds UAs2, USb2 and UBi2, the two-dimensional Fermi surfaces are formed in the flattened magnetic Brillouin zone and the conduction electrons are confined mainly in the U planes. Significant contribution of itinerant 5f electrons to the conduction band is concluded from rather big effective cyclotron masses.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
Journaljournal of the physical society of japan
Volume70
Issue number1
DOIs
Publication statusPublished - 2001 Jan
Externally publishedYes

Keywords

  • Cylindrical fermi surface
  • Shubnikov-de Haas effect
  • UP

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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