O efeito do diodo supercondutor em um dispositivo baseado em junções Josephson acopladas
O chamado efeito de diodo supercondutor (SC) é um fenômeno não recíproco interessante, que ocorre quando um material é SC em uma direção e resistivo na outra. Este efeito tem sido foco de numerosos estudos de física...
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)
Crédito: Matsuo et al.
O chamado efeito de diodo supercondutor (SC) é um fenômeno não recíproco interessante, que ocorre quando um material é SC em uma direção e resistivo na outra. Este efeito tem sido foco de numerosos estudos de física, pois sua observação e controle confiável em diferentes materiais poderão possibilitar o desenvolvimento futuro de novos circuitos integrados.
Pesquisadores do RIKEN e de outros institutos no Japão e nos Estados Unidos observaram recentemente o efeito do diodo SC em um dispositivo recém-desenvolvido composto por duas junções Josephson coerentemente acopladas. Seu artigo, publicado na Nature Physics , poderia orientar a engenharia de tecnologias promissoras baseadas em junções Josephson acopladas.
“Estudamos experimentalmente o efeito Josephson não local, que é um transporte SC característico nas junções Josephson coerentemente acopladas (JJs), inspirados em um artigo teórico anterior publicado na NanoLetters ”, disse Sadashige Matsuo, um dos pesquisadores que realizou o estudo.
"O estudo recente apresentado na Nature Physics é uma extensão do nosso trabalho anterior sobre o efeito Josephson não local . Portanto, utilizamos os mesmos métodos usados ??em nosso artigo anterior."
O trabalho recente de Matsuo e seu colega baseia-se em seus esforços de pesquisa anteriores com foco no transporte SC em JJs acoplados coerentemente. Para conduzir seus experimentos, a equipe utilizou um dispositivo que consiste em dois JJs compartilhando um único cabo SC.
“Quando a liderança SC compartilhada é estreita, os dois JJs são acoplados de forma coerente e interagem entre si”, explicou Matsuo. "Ao incorporar um JJ no loop SC e medir o outro JJ, podemos estudar o transporte SC dos JJs afetados pelos outros JJs através do acoplamento coerente."
Ao modular a fase dos JJs acoplados em seu dispositivo, Matsuo e seus colegas conseguiram produzir o efeito do diodo SC. Seu trabalho, portanto, revelou uma estratégia promissora e confiável para realizar esse efeito em dispositivos baseados em JJs acoplados, além de lançar mais luz sobre a física subjacente ao efeito nesses dispositivos.
“O próprio efeito do diodo SC é importante porque o fenômeno será aplicado para retificação sem dissipação em futuros circuitos SC”, disse Matsuo. "Além disso, o efeito do diodo SC surge quando os dispositivos SC não têm simetrias de reversão de tempo e inversão espacial. Portanto, nossos resultados sugerem que o controle de fase dos JJs acoplados pode quebrar tais simetrias. Isso significa que os outros fenômenos SC exóticos esperados com as simetrias quebradas podem ser realizadas nos JJs acoplados."
No futuro, este artigo recente pode abrir novas oportunidades para o campo da engenharia eletrônica. Por exemplo, os métodos que eles usaram poderiam ser aplicados ao desenvolvimento de novos componentes eletrônicos supercondutores de alto desempenho. Ao mesmo tempo, o trabalho de Matsuo e seus colegas pode inspirar outras equipes de pesquisa em todo o mundo a realizar estudos semelhantes usando JJs acoplados.
"Agora planejamos buscar fenômenos SC exóticos além do efeito de diodo SC , controlando o acoplamento coerente dos JJs", acrescentou Matsuo.
Mais informações: Sadashige Matsuo et al, efeito de diodo Josephson derivado de acoplamento coerente de curto alcance, Nature Physics (2023). DOI: 10.1038/s41567-023-02144-x
Informações do periódico: Nano Letras , Física da Natureza