Surface barrier for flux entry and exit in mesoscopic superconducting systems

被引：18

作者：

Berdiyorov, GR ^{[1
]}

Cabral, LRE ^{[1
]}

Peeters, FM ^{[1
]}

机构：

[1] Univ Antwerp, Dept Fys, B-2020 Antwerp, Belgium

来源：

JOURNAL OF MATHEMATICAL PHYSICS | 2005年 / 46卷 / 09期

关键词：

D O I：

10.1063/1.2010351

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The energy barrier which has to be overcome for a single vortex to enter or exit the sample is studied for thin superconducting disks, rings, and squares using the nonlinear Ginzburg-Landau theory. The shape and the height of the nucleation barrier is investigated for different sample radii and thicknesses and for different values of the Ginzburg-Landau parameter kappa. It is shown that the London theory considerably overestimates (underestimates) the energy barrier for vortex expulsion (penetration). (c) 2005 American Institute of Physics.

引用

页数：17

共 38 条

[1] Mesoscopic superconductors in the London limit: Equilibrium properties and metastability [J].

Akkermans, E ;

Gangardt, DM ;

Mallick, K .

PHYSICAL REVIEW B, 2001, 63 (06)

[2] Influence of surface defects on vortex penetration and expulsion in mesoscopic superconductors [J].

Baelus, BJ ;

Kadowaki, K ;

Peeters, FM .

PHYSICAL REVIEW B, 2005, 71 (02)

[3] Vortex states in superconducting rings [J].

Baelus, BJ ;

Peeters, FM ;

Schweigert, VA .

PHYSICAL REVIEW B, 2000, 61 (14) :9734-9747

[4] Saddle-point states and energy barriers for vortex entrance and exit in superconducting disks and rings [J].

Baelus, BJ ;

Peeters, FM ;

Schweigert, VA .

PHYSICAL REVIEW B, 2001, 63 (14)

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

BEAN, CP ;

LIVINGSTON, JD .

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

[6] Superconducting vortex state in a mesoscopic disk containing a blind hole [J].

Berdiyorov, GR ;

Milosevic, MV ;

Baelus, BJ ;

Peeters, FM .

PHYSICAL REVIEW B, 2004, 70 (02) :024508-1

[7] Observation of mesoscopic vortex physics using micromechanical oscillators [J].

Bolle, CA ;

Aksyuk, V ;

Pardo, F ;

Gammel, PL ;

Zeldov, E ;

Bucher, E ;

Boie, R ;

Bishop, DJ ;

Nelson, DR .

NATURE, 1999, 399 (6731) :43-46

[8] Geometric barrier and current string in type-II superconductors obtained from continuum electrodynamics [J].

Brandt, EH .

PHYSICAL REVIEW B, 1999, 59 (05) :3369-3372

[9] SQUARE AND RECTANGULAR THIN SUPERCONDUCTORS IN A TRANSVERSE MAGNETIC-FIELD [J].

BRANDT, EH .

PHYSICAL REVIEW LETTERS, 1995, 74 (15) :3025-3028

[10] Superconductors of finite thickness in a perpendicular magnetic field: Strips and slabs [J].

Brandt, EH .

PHYSICAL REVIEW B, 1996, 54 (06) :4246-4264

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