Dynamics and heat diffusion of Abrikosov's vortex-antivortex pairs during an annihilation process

Author(s)

Duarte, E. C. S. ; Sardella, E. ; Ortiz, W. A. ; Zadorosny, R.

• Document type: Journal article
• Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 29, n. 40 OCT 11 2017.
• Web of Science Citations: 5

Abstract

The manipulation and control of vortex states in superconducting systems are of great interest in view of possible applications, for which mesoscopic materials are good candidates. In this work, we studied the annihilation dynamics and the dissipative aspects of an Abrikosov's vortex-antivortex pair in a mesoscopic superconducting system with a concentric hole. The generalized time-dependent Ginzburg-Landau equations were numerically solved. The main result is the appearance of a phase slip-like line due to the elongation of the vortex and antivortex cores. Under specific circumstances, thermal dissipation might be associated with a sizeable relaxation of the order parameter, so that the energy released in the annihilation of a vortex-antivortex pair might become detectable in measurements of the magnetization as a function of time. (AU)

• FAPESP's process: 16/12390-6 - Macro and mesoscopic superconductivity: synthesis of ceramic materials and computational simulations based on the TDGL theory
• Grantee: Rafael Zadorosny
• Support Opportunities: Regular Research Grants
• 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: 07/08072-0 - Fundamental research in superconductivity and magnetism - systems potentially useful for aplications: advanced oxides and superconductors patterned with artificial structures
• Grantee: Wilson Aires Ortiz
• Support Opportunities: Research Projects - Thematic Grants