Vortex ratchet induced by controlled edge roughness

被引：46

作者：

Cerbu, D. ^{[1
]}

Gladilin, V. N. ^{[1
,2
]}

Cuppens, J. ^{[1
]}

Fritzsche, J. ^{[3
]}

Tempere, J. ^{[2
]}

Devreese, J. T. ^{[2
]}

Moshchalkov, V. V. ^{[1
]}

Silhanek, A. V. ^{[4
]}

Van de Vondel, J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium

[2] Univ Antwerp, TQC Theory Quantum & Complex Syst, B-2610 Antwerp, Belgium

[3] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

[4] Univ Liege, Dept Phys, B-4000 Sart Tilman Par Liege, Belgium

来源：

NEW JOURNAL OF PHYSICS | 2013年 / 15卷

关键词：

BROWNIAN MOTORS; MAGNETIZATION; TRANSPORT; DYNAMICS;

D O I：

10.1088/1367-2630/15/6/063022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate theoretically and experimentally the generation of rectified mean vortex displacement resulting from a controlled difference between the surface barriers at the opposite borders of a superconducting strip. Our investigation focuses on Al superconducting strips where, in one of the two sample borders, a saw tooth-like array of micro-indentations has been imprinted. The origin of the vortex ratchet effect is based on the fact that (i) the onset of vortex motion is mainly governed by the entrance/nucleation of vortices and (ii) the current lines bunching produced by the indentations facilitates the entrance/nucleation of vortices. Only for one current direction the indentations are positioned at the side of vortex entry and the onset of the resistive regime is lowered compared to the opposite current direction. This investigation points to the relevance of ubiquitous border effects typically neglected when interpreting vortex ratchet measurements on samples with arrays of local asymmetric pinning sites.

引用

页数：13

共 39 条

[1] Current crowding effects in superconducting corner-shaped Al microstrips [J].

Adami, O. -A. ;

Cerbu, D. ;

Cabosart, D. ;

Motta, M. ;

Cuppens, J. ;

Ortiz, W. A. ;

Moshchalkov, V. V. ;

Hackens, B. ;

Delamare, R. ;

Van de Vondel, J. ;

Silhanek, A. V. .

APPLIED PHYSICS LETTERS, 2013, 102 (05)

[2] Unusual dc electric fields induced by a high frequency alternating current in superconducting Nb films under a perpendicular magnetic field [J].

Aliev, F. G. ;

Levanyuk, A. P. ;

Villar, R. ;

Sierra, J. F. ;

Pryadun, V. V. ;

Awad, A. ;

Moshchalkov, V. V. .

NEW JOURNAL OF PHYSICS, 2009, 11

[3] SURFACE BARRIER IN TYPE-2 SUPERCONDUCTORS [J].

BEAN, CP ;

LIVINGSTON, JD .

PHYSICAL REVIEW LETTERS, 1964, 12 (01) :14-&

[4] Electromagnetic pinning of vortices on different types of defects [J].

Buzdin, A ;

Daumens, M .

PHYSICA C, 1998, 294 (3-4) :257-269

[5] Predicted field-dependent increase of critical currents in asymmetric superconducting nanocircuits [J].

Clem, John R. ;

Mawatari, Yasunori ;

Berdiyorov, G. R. ;

Peeters, F. M. .

PHYSICAL REVIEW B, 2012, 85 (14)

[6] Dipole-induced vortex ratchets in superconducting films with arrays of micromagnets [J].

de Souza Silva, C. C. ;

Silhanek, A. V. ;

Van de Vondel, J. ;

Gillijns, W. ;

Metlushko, V. ;

Ilic, B. ;

Moshchalkov, V. V. .

PHYSICAL REVIEW LETTERS, 2007, 98 (11)

[7] Vortex ratchet effects in films with a periodic array of antidots [J].

de Souza Silva, CC ;

Van de Vondel, J ;

Zhu, BY ;

Morelle, M ;

Moshchalkov, VV .

PHYSICAL REVIEW B, 2006, 73 (01)

[8]

Drude P, 1900, ANN PHYS-BERLIN, V1, P566

[9] Phase transitions in individual sub-micrometre superconductors [J].

Geim, AK ;

Grigorieva, IV ;

Dubonos, SV ;

Lok, JGS ;

Maan, JC ;

Filippov, AE ;

Peeters, FM .

NATURE, 1997, 390 (6657) :259-262

[10] Origin of reversed vortex ratchet motion [J].

Gillijns, W. ;

Silhanek, A. V. ;

Moshchalkov, V. V. ;

Reichhardt, C. J. Olson ;

Reichhardt, C. .

PHYSICAL REVIEW LETTERS, 2007, 99 (24)

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