AUTHOR: Rubén Seoane. Quantum Materials for Quantum Technologies (Q4Q) group (ICMM)
TITLE: 'Towards Supercurrent electronics'
WHEN: February, 12th - 12PM
WHERE: Salón de Actos, ICMM-CSIC
ABSTRACT: Non-reciprocal elements are essential components in modern electronics, that enable functionalities such as current rectification, power conversion, and signal detection. The simplest example is the semiconductor diode, which permits current flow in one direction while blocking it in the other direction, depending on the polarity of the applied voltage bias. Motivated by the pursuit of energy-efficient electronic components, recent efforts have focused on realizing a superconducting analogue: the Josephson diode, which exhibits an asymmetric critical current, enabling non-dissipative supercurrent flow only in one direction [1].
Although the Josephson diode effect has been demonstrated in several materials and platforms, the rectification ratio (so-called diode efficiency) is often modest, typically reaching a few percent of the critical current. In this presentation, I will discuss recent progress toward ideal superconducting diodes, where dissipationless current is allowed in only one direction. I will focus on driven Josephson junctions [2,3], which have enabled experimental realizations of ideal diodes in both SQUIDs [4] and single junction devices [5,6]. This progress paves the way toward practical supercurrent rectifiers, with promising applications in low-dissipation superconducting circuits and efficient information processing.
