<研究ノート>超伝導ダイオード効果の観測

Abstract

The diode, which has a low resistance in the forward direction and a high resistance in the reverse direction, forms the basis of numerous electronic components, such as rectifiers, AC-DC converters, and photodetectors. However, there inevitably exists an energy loss due to the finite resistance in the forward direction. Therefore, it is a worthwhile goal to realize a superconducting diode that has zero resistance only in the forward direction. In this study, we fabricated a new class of superconducting superlattice consisting of Nb, V, Ta, in which global inversion symmetry was broken along the stacking direction, and discovered a superconducting diode effect. This superconducting diode effect enables the phase coherent and direction selective charge transport, paving the way for the construction of non-dissipative electronic circuits.