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

doi:10.1143/JPSJ.70.278

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 journal › Article › peer-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 language	English
Pages (from-to)	278-283
Number of pages	6
Journal	journal of the physical society of japan
Volume	70
Issue number	1
DOIs	https://doi.org/10.1143/JPSJ.70.278
Publication status	Published - 2001 Jan
Externally published	Yes

Keywords

Cylindrical fermi surface
Shubnikov-de Haas effect
UP

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.70.278

Cite this

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title = "Shubnikov-de Haas effect study of cylindrical fermi surfaces in UP2",

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.",

keywords = "Cylindrical fermi surface, Shubnikov-de Haas effect, UP",

author = "Piotr Wi{\'s}niewsk and Dai Aoki and Narumi Watanabe and Rikio Settai and Yoshinori Haga and Etsuji Yamamoto and Yoshichika Onuki",

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AU - Wiśniewsk, Piotr

AU - Aoki, Dai

AU - Watanabe, Narumi

AU - Settai, Rikio

AU - Haga, Yoshinori

AU - Yamamoto, Etsuji

AU - Onuki, Yoshichika

PY - 2001/1

Y1 - 2001/1

N2 - 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.

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