Unconventional anti-vortex spontaneous generation in a superconducting microstructure

被引：1

作者：

Barba-Ortega, J. ^{[1
]}

Aguilar, J. L. ^{[2
]}

Gonzalez, J. D. ^{[2
]}

机构：

[1] Univ Nacl Colombia, Dept Fis, Bogota 1149, Colombia

[2] Univ Magdalena, Dept Fis, Grp Teoria Mat Condensada, Santa Marta, Colombia

来源：

MODERN PHYSICS LETTERS B | 2015年 / 29卷 / 14期

关键词：

Ginzburg-Landau theory; anti-vortex; mesoscopic superconductor; magnetization; MESOSCOPIC SUPERCONDUCTORS; FILMS;

D O I：

10.1142/S0217984915500700

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate theoretically the superconducting matter in a microscopic structure consisting of a square prism with a central square dot. The transversal cross-section area of the square and the dot are L-2 = 2500 xi(2)(0) and T-2 = 196 xi(2)(0), respectively. The magnetic field and the order parameter are invariant along z-direction. We show that below T-c the physics of this system projects an interesting decrease in the vorticity when the external applied magnetic field is increasing. We think that this phenomenon can be explained including a spontaneous generation of anti-vortex states due to the symmetry breaking effects in this system.

引用

页数：8

共 17 条

[11] ORDERING, METASTABILITY AND PHASE-TRANSITIONS IN 2 DIMENSIONAL SYSTEMS [J].

Kosterlitz, JM ;

Thouless, DJ .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1973, 6 (07) :1181-1203

[12] Magnetic flux pinning in superconductors with hyperbolic-tesselation arrays of pinning sites [J].

Misko, V. R. ;

Nori, Franco .

PHYSICAL REVIEW B, 2012, 85 (18)

[13] Stable vortex-antivortex molecules in mesoscopic superconducting triangles [J].

Misko, VR ;

Fomin, VM ;

Devreese, JT ;

Moshchalkov, VV .

PHYSICAL REVIEW LETTERS, 2003, 90 (14) :4

[14] Enhanced pinning in superconducting thin films with graded pinning landscapes [J].

Motta, M. ;

Colauto, F. ;

Ortiz, W. A. ;

Fritzsche, J. ;

Cuppens, J. ;

Gillijns, W. ;

Moshchalkov, V. V. ;

Johansen, T. H. ;

Sanchez, A. ;

Silhanek, A. V. .

APPLIED PHYSICS LETTERS, 2013, 102 (21)

[15] Vortices in a mesoscopic superconducting disk of variable thickness [J].

Sardella, E. ;

Brandt, E. H. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2010, 23 (02)

[16] Vortex-antivortex patterns in mesoscopic superconductors [J].

Teniers, G ;

Moshchalkov, VV ;

Chibotaru, LF ;

Ceulemans, A .

PHYSICA B-CONDENSED MATTER, 2003, 329 :1340-1343

[17] Crossover behaviors in magnetoresistance oscillations for Nb thin film with rectangular arrays of antidots [J].

Zhang, W. J. ;

He, S. K. ;

Liu, H. F. ;

Xue, G. M. ;

Xiao, H. ;

Li, B. H. ;

Wen, Z. C. ;

Han, X. F. ;

Zhao, S. P. ;

Gu, C. Z. ;

Qiu, X. G. ;

Moshchalkov, Victor V. .

EPL, 2012, 99 (03)

← 1 2 →