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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ultra-fast kinematic vortices in mesoscopic superconductors: the effect of the self-field

Full text
Author(s):
Cadorim, Leonardo Rodrigues [1] ; de Oliveira Junior, Alexssandre [2] ; Sardella, Edson [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista UNESP, Dept Fis, Fac Ciencias, Caixa Postal 473, BR-17033360 Bauru, SP - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, POB 6165, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 10, n. 1 OCT 29 2020.
Web of Science Citations: 0
Abstract

Within the framework of the generalized time-dependent Ginzburg-Landau equations, we studied the influence of the magnetic self-field induced by the currents inside a superconducting sample driven by an applied transport current. The numerical simulations of the resistive state of the system show that neither material inhomogeneity nor a normal contact smaller than the sample width are required to produce an inhomogeneous current distribution inside the sample, which leads to the emergence of a kinematic vortex-antivortex pair (vortex street) solution. Further, we discuss the behaviors of the kinematic vortex velocity, the annihilation rates of the supercurrent, and the superconducting order parameters alongside the vortex street solution. We prove that these two latter points explain the characteristics of the resistive state of the system. They are the fundamental basis to describe the peak of the current-resistance characteristic curve and the location where the vortex-antivortex pair is formed. (AU)

FAPESP's process: 12/04388-0 - Tridimensional simulations of the demagnetization effects in nanostructured superconducting films
Grantee:Edson Sardella
Support Opportunities: Regular Research Grants
FAPESP's process: 20/03947-2 - Characterization of magnetic and electronic properties in mesoscopic and nanostructured multiband superconductors
Grantee:Leonardo Rodrigues Cadorim
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 15/21189-0 - Kinematic vortices in mesoscopic superconductors with a constriction
Grantee:Alexssandre de Oliveira Junior
Support Opportunities: Scholarships in Brazil - Scientific Initiation