Anomalous switching in Nb/Ru/Sr2RuO4 topological junctions by chiral domain wall motion

被引：39

作者：

Anwar, M. S. ^{[1
]}

Nakamura, Taketomo ^{[1
,2
]}

Yonezawa, S. ^{[1
]}

Yakabe, M. ^{[3
]}

Ishiguro, R. ^{[3
]}

Takayanagi, H. ^{[3
,4
]}

Maeno, Y. ^{[1
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Tokyo Univ Sci, Dept Appl Phys, Fac Sci, Tokyo 1628601, Japan

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

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

关键词：

TIME-REVERSAL SYMMETRY; SUPERCONDUCTIVITY; SR2RUO4;

D O I：

10.1038/srep02480

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A spontaneous symmetry breaking in a system often results in domain wall formation. The motion of such domain walls is utilized to realize novel devices like racetrack-memories, in which moving ferromagnetic domain walls store and carry information. Superconductors breaking time reversal symmetry can also form domains with degenerate chirality of their superconducting order parameter. Sr2RuO4 is the leading candidate of a chiral p-wave superconductor, expected to be accompanied by chiral domain structure. Here, we present that Nb/Ru/Sr2RuO4 topological superconducting-junctions, with which the phase winding of order parameter can be effectively probed by making use of real-space topology, exhibit unusual switching between higher and lower critical current states. This switching is well explained by chiral-domain-wall dynamics. The switching can be partly controlled by external parameters such as temperature, magnetic field and current. These results open up a possibility to utilize the superconducting chiral domain wall motion for future novel superconducting devices.

引用

页数：6

共 25 条

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