Out-of-Equilibrium Vortex Dynamics: vortex interaction with defects and transport currents

• Grant number: 22/11299-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2023
• End date: May 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Rafael Zadorosny
• Grantee: Talles Nuam de Souza Benites
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

The knowledge of the vortex dynamics, its viscous motion, and its interaction with defects is essential for the superconductor´s application. If, on the one hand, such vortex-defect interactions have been extensively explored, on the other one, new defect natures have been proposed to control the vortex dynamics. Additionally, there is a lack of studies dealing with the defect´s geometry, its kind (holes, blind holes, higher-$T_c$ dots, magnetic dots, etc.), and external parameters like magnetic fields and currents. Thus, the present work aims to study the vortex dynamics in superconductors with triangular blind holes in the presence of external magnetic fields and transport currents. The generalized time-dependent Ginzburg-Landau (GTDGL) equations will be numerically solved, simulating rectangular superconducting systems with a central defect. The influence of the defect will be analyzed by comparing currents flowing in different directions through the sample. It will be evaluated both the order parameter and the density of superconducting current distribution as well as the characteristic behavior of the voltage as a function of current density and time.