Harnessing the superconducting diode effect through inhomogeneous magnetic fields

Autor(es)

Cadorim, Leonardo Rodrigues ; Sardella, Edson ; Silva, Clecio C. de Souza

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW APPLIED; v. 21, n. 5, p. 13-pg., 2024-05-21.

Resumo

We propose a superconducting diode device comprising a central superconducting film flanked by two wires carrying an applied dc bias, suitably chosen so as to generate different asymmetric field profiles. Through numerical simulations of the coupled Ginzburg-Landau and heat -diffusion equations, we show that this design is capable of efficiently breaking the reciprocity of the critical current in the central superconductor, thus promoting the diode effect in response to an applied ac. By adjusting the dc bias in the wires, we find the optimum inhomogeneous field profile that facilitates the entrance of vortices and antivortices in a given polarity of the applied ac and impede their entrance in the other polarity. This way, the system behaves as a superconducting half -wave rectifier, with diode efficiencies surpassing 70%. Furthermore, we detail the behavior and diode efficiency of the system under different experimental conditions, such as the substrate heat -transfer coefficient and the sweep rate of the external current. (AU)

• Processo FAPESP: 20/03947-2 - Caracterização de propriedades magnéticas e eletrônicas em supercondutores mesoscópicos e nanoestruturados com múltiplas bandas
• Beneficiário: Leonardo Rodrigues Cadorim
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 20/10058-0 - Estudo do estado resistivo de supercondutores mesoscópicos de espessura finita
• Beneficiário: Edson Sardella
• Modalidade de apoio: Auxílio à Pesquisa - Regular