Shapiro step response in the coherent Josephson flux flow state of Bi2Sr2CaCu2O8+δ -: art. no. 247007

被引：56

作者：

Latyshev, YI

Gaifullin, MB

Yamashita, T

Machida, M

Matsuda, Y

机构：

[1] Tohoku Univ, Elect Commun Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Russian Acad Sci, Inst Radioengn & Elect, Moscow 103907, Russia

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

[4] Japan Atom Energy Res Inst, Ctr Promot Computat Sci & Engn, Meguro Ku, Tokyo 1530061, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.87.247007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of Shapiro steps in the Josephson flux flow state of Bi2Sr2CaCu2O8+delta stacked junctions. When the junction is irradiated at microwave frequencies in a strong parallel magnetic field (H greater than or equal to 1 T), a steep increase of the current is observed in the de current-voltage characteristics when the external microwave frequency and the Josephson frequency are harmonically related. The existence of Shapiro steps in the Josephson flux flow state is strong evidence of coherent motion of the Josephson vortex lattice through the whole thickness of the stack.

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页码：247007 / 1

页数：4

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