Vortex matter in oblate mesoscopic superconductors with a hole: broken symmetry vortex states and multi-vortex entry

This article examines the vortex matter of mesoscopic superconductors with numerous vortex states that do not exist in bulk superconductors. Using scanning tunneling microscopy/spectroscopy, it investigates the organization of vortex cores at different levels of confinement. The article begins with a discussion of the basic properties of quantum vortices in superconductors and experimental requirements for studying vortex confinement phenomena. It then considers the effect of sample size and shape on vortex distribution and pinning, along with the resulting ultra-dense configurations that cannot be achieved in bulk superconductors. It also describes the peculiar features of vortices in atomically thin superconductors having mixed Abrikosov–Josephson vortices.

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Geometric effect on the vortex configuration and motion in mesoscopic superconducting cylinders

International Journal of Modern Physics B ◽

10.1142/s0217979215500095 ◽

2015 ◽

Vol 29 (03) ◽

pp. 1550009 ◽

Cited By ~ 1

Author(s):

Shan-Shan Wang ◽

Guo-Qiao Zha

Keyword(s):

Phase Transitions ◽

Vortex Dynamics ◽

Axial Symmetry ◽

Time Dependent ◽

Vortex Matter ◽

Ginzburg Landau ◽

Geometric Effect ◽

Multiply Connected ◽

Vortex States ◽

Ginzburg Landau Equations

Based on the time-dependent Ginzburg–Landau equations, we study numerically the vortex configuration and motion in mesoscopic superconducting cylinders. We find that the effects of the geometric symmetry of the system and the noncircular multiply-connected boundaries can significantly influence the steady vortex states and the vortex matter moving. For the square cylindrical loops, the vortices can enter the superconducting region in multiples of 2 and the vortex configuration exhibits the axial symmetry along the square diagonal. Moreover, the vortex dynamics behavior exhibits more complications due to the existed centered hole, which can lead to the vortex entering from different edges and exiting into the hole at the phase transitions.

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Vortex states in mesoscopic superconductors

Bulletin of the Russian Academy of Sciences Physics ◽

10.3103/s1062873807010029 ◽

2007 ◽

Vol 71 (1) ◽

pp. 6-9

Author(s):

V. M. Vinokur ◽

N. B. Kopnin ◽

A. S. Mel’nikov ◽

I. M. Nefedov ◽

V. I. Pozdnyakova ◽

...

Keyword(s):

Vortex States ◽

Mesoscopic Superconductors

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Tunable quasiparticle trapping in Meissner and vortex states of mesoscopic superconductors

Nature Communications ◽

10.1038/ncomms10977 ◽

2016 ◽

Vol 7 (1) ◽

Cited By ~ 27

Author(s):

M. Taupin ◽

I. M. Khaymovich ◽

M. Meschke ◽

A. S. Mel’nikov ◽

J. P. Pekola

Keyword(s):

Vortex States ◽

Mesoscopic Superconductors ◽

Quasiparticle Trapping

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Vortex Configurations in Mesoscopic Superconducting Nanowires

Modern Physics Letters B ◽

10.1142/s0217984903005561 ◽

2003 ◽

Vol 17 (10n12) ◽

pp. 537-547 ◽

Cited By ~ 3

Author(s):

G. Stenuit ◽

S. Michotte ◽

J. Govaerts ◽

L. Piraux ◽

D. Bertrand

Keyword(s):

Magnetic Properties ◽

Phase Diagrams ◽

Magnetization Curves ◽

Winding Number ◽

Superconducting Nanowires ◽

Ginzburg Landau ◽

Landau Model ◽

Vortex States ◽

Mesoscopic Superconductors ◽

Giant Vortex

Beyond the well-known Abrikosov and giant vortex configurations, new solutions to the Ginzburg–Landau model corresponding to vortices of integer and half-integer winding number are described. Phase diagrams (Bext, Energy) and magnetization curves have been determined, aiming towards an understanding of the magnetic properties of lead nanowires and the possible consequences of such solutions with respect to the switching mechanism between vortex states in mesoscopic superconductors.

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Micromagnetic Measurements on Electrochemically Grown Mesoscopic Superconductors

10.1093/oxfordhb/9780198738169.013.10 ◽

2017 ◽

Author(s):

A. Müller ◽

S.E.C. Dale ◽

M.A. Engbarth

Keyword(s):

Close Contact ◽

Proximity Effects ◽

Shell Structures ◽

Core Shell ◽

Type I ◽

Electrochemical Preparation ◽

Vortex States ◽

Hall Probes ◽

Mesoscopic Superconductivity ◽

Mesoscopic Superconductors

This article examines the behavior of superconductivity in mesoscopic type-I superconductors based on micromagnetic measurements on two electrochemically grown mesoscopic superconductors, namely lead and tin. It first provides an overview of the basic properties of mesoscopic superconductivity and the interface between two different superconductors that are in close contact with one another. It then describes the electrochemical preparation of β-tin samples in a variety of shapes and sizes in the mesoscopic regime. It also presents the results of micromagnetic measurements, carried out using micro-Hall probes, including observations of the vortex states in mesoscopic tin and lead triangles and of proximity effects in lead/tin core–shell structures.

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