Fast Josephson vortex ratchet made of intrinsic Josephson junctions in Bi2Sr2CaCu2O8

被引：11

作者：

Wang, H. B. ^{[1
]}

Zhu, B. Y. ^{[4
,5
]}

Guerlich, C. ^{[2
,3
]}

Ruoff, M. ^{[2
,3
]}

Kim, S. ^{[1
]}

Hatano, T. ^{[1
]}

Zhao, B. R. ^{[4
,5
]}

Zhao, Z. X. ^{[4
,5
]}

Goldobin, E. ^{[2
,3
]}

Koelle, D. ^{[2
,3
]}

Kleiner, R. ^{[2
,3
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tubingen, Phys Inst Expt Phys 2, D-72076 Tubingen, Germany

[3] Univ Tubingen, Ctr Collect Quantum Phenomena, D-72076 Tubingen, Germany

[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

[5] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 22期

基金：

中国国家自然科学基金;

关键词：

bismuth compounds; flux-line lattice; high-temperature superconductors; Josephson effect; mixed state; numerical analysis; strontium compounds; superconducting materials; MAGNETIC-FLUX QUANTA; BROWNIAN MOTORS; SINGLE-CRYSTALS; SUPERCONDUCTORS; TRANSPORT; MOTION;

D O I：

10.1103/PhysRevB.80.224507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate the operation of a deterministic fluxon ratchet made of a stack of 30 intrinsic Bi2Sr2CaCu2O8 Josephson junctions. The ratchet has the shape of a gear with 20 asymmetric teeth (periods). It produces a rectified voltage of about 100 mu V at a 12 GHz drive frequency. The effect of coupling between intrinsic junctions, i.e., the mode of fluxon motion for ratchet operation, has been studied within the framework of the two-dimensional coupled sine-Gordon equations. Further, we used low-temperature scanning laser microscopy to demonstrate that voltage rectification indeed is due to directed fluxon motion, in agreement with numerical simulations.

引用

页数：4

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