Supercurrent switch in graphene π junctions

被引：79

作者：

Linder, Jacob ^{[1
]}

Yokoyama, Takehito ^{[2
]}

Huertas-Hernando, Daniel ^{[1
]}

Sudbo, Asle ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim, Norway

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.100.187004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the supercurrent in a superconductor/ferromagnet/superconductor graphene junction. In contrast to its metallic counterpart, the oscillating critical current in our setup decays only weakly upon increasing the exchange field and junction width. We find an unusually large residual value of the supercurrent at the oscillatory cusps due to a strong deviation from a sinusoidal current-phase relationship. Our findings suggest a very efficient device for dissipationless supercurrent switching.

引用

页数：4

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