de Haas-van Alphen Effect in LaFePO with Two-Dimensional Cylindrical Fermi Surfaces

被引：25

作者：

Sugawara, Hitoshi ^{[1
]}

Settai, Rikio ^{[2
]}

Doi, Yusuke ^{[2
]}

Muranaka, Hiroshi ^{[2
]}

Katayama, Keisuke ^{[2
]}

Yamagami, Hiroshi ^{[3
]}

Onuki, Yoshichika ^{[2
]}

机构：

[1] Univ Tokushima, Fac Integrated Arts & Sci, Tokushima 7708502, Japan

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

[3] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2008年 / 77卷 / 11期

关键词：

LaFePO; single crystal; de Haas-van Alphen effect; Fermi surface; superconductivity;

D O I：

10.1143/JPSJ.77.113711

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have Succeeded in observing the de Haas-van Alphen (dHvA) effect in LaFePO. the first reported iron-based superconductor in the iron-oxypnictide family. The four detected dHvA frequencies, which correspond to the cross-sectional areas of Fermi surfaces, approximately follow the 1/cos theta dependence,, where theta is the field-tilted angle from the [001] direction to the [100] and [110] directions in the tetragonal structure. This indicates that all the Fermi surfaces are nearly cylindrical, with the two-dimensional electronic state. The cyclotron effective mass, which was determined from the temperature dependence of the dHvA amplitude, is relatively large, ranging from 1.82 to 2.34m(0). The result of energy band structure calculation revealed that the conduction bands mainly consist of 3d electrons of Fe atoms.

引用

页数：4

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