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

被引：55

作者：

Ebihara, T

Inada, Y

Murakawa, M

Uji, S

Terakura, C

Terashima, T

Yamamoto, E

Haga, Y

Onuki, Y

Harima, H

机构：

[1] Shizuoka Univ, Fac Sci, Dept Phys, Shizuoka 4228529, Japan

[2] Osaka Univ, Grad Sch Sci, Osaka 5600043, Japan

[3] Natl Res Inst Met, Tsukuba Magnet Lab, Tsukuba, Ibaraki 3050003, Japan

[4] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[5] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 03期

关键词：

fermi surface; dHvA; energy band structure; YbAl3;

D O I：

10.1143/JPSJ.69.895

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The carried out the de Haas-van Alphen (dHvA) experiment in YbAl3 with the cubic crystal structure. One of the six dHvA branches, named beta with a dHvA frequency of 4.5 x 10(7) Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m(0). 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 m(0). 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.

引用

页码：895 / 899

页数：5

共 12 条

[1] deHaas-vanAlphen oscillations and magnetic properties of YbPb3 and EuPb3 [J].