Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure

被引：5

作者：

Sakai, Y. ^{[1
]}

Motoyama, G. ^{[1
]}

Yamaguchi, A. ^{[1
]}

Sumiyama, A. ^{[1
]}

Yamamura, A. ^{[2
]}

Sato, I. ^{[2
]}

机构：

[1] Univ Hyogo, Grad Sch Mat Sci, Kobe, Hyogo 6781297, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2012年 / 81卷

关键词：

point-contact spectroscopy; heavy fermion; high pressure; URu2Si2;

D O I：

10.1143/JPSJS.81SB.SB068

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have developed a new method to perform point-contact spectroscopy PCS under pressure, in which a thin-film deposition technique is used for making a point contact. We investigated a pressure dependence of the point-contact spectra of the heavy-fermion superconductor URu2Si2 single crystal. In PCS of URu2Si2, two characteristic components evolve at low temperatures: one is a symmetric structure with respect to zero bias voltage suggesting a gap of the density of states at the Fermi surface, and the other is an anti-symmetric structure. We observed little change of two components between hidden order and antiferromagnetic phases.

引用

页数：4

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