Magnetization of a Mesoscopic Superconducting Sr2RuO4 Plate on Micro-dc-SQUIDs

被引：9

作者：

Tsuchiya, Shogo ^{[1
]}

Matsuno, Misa ^{[1
]}

Ishiguro, Ryosuke ^{[1
,2
]}

Kashiwaya, Hiromi ^{[3
]}

Kashiwaya, Satoshi ^{[3
]}

Nomura, Shintaro ^{[4
]}

Takayanagi, Hideaki ^{[1
,5
]}

Maeno, Yoshiteru ^{[6
]}

机构：

[1] Tokyo Univ Sci, Fac Sci, Dept Appl Phys, Katsushika, Tokyo 1258585, Japan

[2] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[4] Univ Tsukuba, Div Phys, Tsukuba, Ibaraki 3058571, Japan

[5] NIMS, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan

[6] Kyoto Univ, Dept Phys, Fac Sci, Kyoto 6068502, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2014年 / 83卷 / 09期

基金：

日本学术振兴会;

关键词：

INTRINSIC ANGULAR-MOMENTUM; TIME-REVERSAL SYMMETRY;

D O I：

10.7566/JPSJ.83.094715

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the measurement of the magnetization of mesoscopic plates made of the chiral p-wave superconductor Sr2RuO4 by using micro-dc-superconducting quantum interference devices (SQUIDs) positioned immediately below the plates. The high sensitivity of the micro-dc-SQUIDs is expected to enable the detection of direction of the chirality. We measured the magnetization of mesoscopic Sr2RuO4 plate-like crystals and found residual magnetization at the zero external field in the thin sample and detected a first critical field H-c1 symmetric against the magnetic field direction. The observed symmetric first critical field H-c1 is consistent with the formation of multi-chiral domain structures. We carefully discuss the origin of the residual magnetization and conclude that it is due to the remnant vortices rather than the chiral edge current.

引用

页数：5

共 23 条

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PHYSICAL REVIEW B, 2014, 90 (13):
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