Describing heat dissipation in the resistive state of three-dimensional superconductors

Author(s)

Cadorim, Leonardo Rodrigues ; Toledo, Lucas Veneziani de ; Sardella, Edson

• Document type: Journal article
• Source: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS; v. 622, p. 10-pg., 2024-05-23.

Abstract

In this work we study the role of the heat diffusion equation in simulating the resistive state of superconducting films. By analyzing the current-voltage and current-resistance characteristic curves for temperatures close to T c and various heat removal scenarios, we demonstrate that heat diffusion notably influences the behavior of the resistive state, specially near the transition to the normal state, where heat significantly changes the critical current and the calculated resistance. Furthermore, we show how the efficiency of the substrate has important effects in the dynamics of the system, particularly for lower temperatures. Finally, we investigate the hysteresis loops, the role of the film thickness and of the Ginzburg-Landau parameter, the findings reassuring the significance of accounting for heat diffusion in accurately modeling the resistive state of superconducting films and provide valuable insights into its complex dynamics. To accomplish these findings, we have used the 3 D generalized Ginzburg-Landau equation coupled with the heat diffusion equation. (AU)

• 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: 19/24618-0 - Clusters of vortices in mesoscopic type i superconducting films induced by thermal gradient
• Grantee: Lucas Veneziani de Toledo
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 20/10058-0 - Study of the resistive state of meoscopic superconductors of finite thickness
• Grantee: Edson Sardella
• Support Opportunities: Regular Research Grants