Heavy fermions in YbAl3 studied by the de Haas-van Alphen effect

Takao Ebihara; Yoshihiko Inada; Masao Murakawa; Shinya Uji; Chieko Terakura; Taichi Terashima; Etsuji Yamamoto; Yoshinori Haga; Yoshichika Onuki; Hisatomo Harima

doi:10.1143/JPSJ.69.895

Heavy fermions in YbAl₃ studied by the de Haas-van Alphen effect

Takao Ebihara, Yoshihiko Inada, Masao Murakawa, Shinya Uji, Chieko Terakura, Taichi Terashima, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki, Hisatomo Harima

Research output: Contribution to journal › Article › peer-review

56 Citations (Scopus)

Abstract

We carried out the de Haas-van Alphen (dHvA) experiment in YbAl₃ with the cubic crystal structure. One of the six dHvA branches, named β with a dHvA frequency of 4.5×10⁷ Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m₀. The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m₀. The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl₃ are below the Fermi level. A small alteration so as to shift upwards the 4f-levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.

Original language	English
Pages (from-to)	895-899
Number of pages	5
Journal	journal of the physical society of japan
Volume	69
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.69.895
Publication status	Published - Mar 2000
Externally published	Yes

Keywords

Energy band structure
Fermi surface
YbAl
dHvA

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.69.895

Cite this

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title = "Heavy fermions in YbAl3 studied by the de Haas-van Alphen effect",

abstract = "We carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named β with a dHvA frequency of 4.5×107 Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m0. The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m0. The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl3 are below the Fermi level. A small alteration so as to shift upwards the 4f-levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.",

keywords = "Energy band structure, Fermi surface, YbAl, dHvA",

author = "Takao Ebihara and Yoshihiko Inada and Masao Murakawa and Shinya Uji and Chieko Terakura and Taichi Terashima and Etsuji Yamamoto and Yoshinori Haga and Yoshichika Onuki and Hisatomo Harima",

year = "2000",

month = mar,

doi = "10.1143/JPSJ.69.895",

language = "English",

volume = "69",

pages = "895--899",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

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TY - JOUR

T1 - Heavy fermions in YbAl3 studied by the de Haas-van Alphen effect

AU - Ebihara, Takao

AU - Inada, Yoshihiko

AU - Murakawa, Masao

AU - Uji, Shinya

AU - Terakura, Chieko

AU - Terashima, Taichi

AU - Yamamoto, Etsuji

AU - Haga, Yoshinori

AU - Onuki, Yoshichika

AU - Harima, Hisatomo

PY - 2000/3

Y1 - 2000/3

N2 - We carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named β with a dHvA frequency of 4.5×107 Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m0. The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m0. The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl3 are below the Fermi level. A small alteration so as to shift upwards the 4f-levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.

AB - We carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named β with a dHvA frequency of 4.5×107 Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m0. The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m0. The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4f-levels in YbAl3 are below the Fermi level. A small alteration so as to shift upwards the 4f-levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4f-electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.

KW - Energy band structure

KW - Fermi surface

KW - YbAl

KW - dHvA

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