Subharmonic energy-gap structure in superconducting weak links

Subharmonic energy-gap structure in superconducting weak links.

Effect of rf on subharmonic gap structure in superconducting junctions

2014 The rf-power dependence of the structure in the current-voltage characteristic located at the voltage V = (2 0394 ± nhv)/me has been measured and found very similar to the familiar microwave-assisted tunneling (m = 1). 2 0394 is the superconducting energy gap, v the applied frequency, m = 1, 2, 3, ... and n = 0, 1, 2, ... That is, the variation with power of all these structures is found c...

Magnetically controlled superconducting weak links

We have designed and characterized a magnetic template which can be switched between chains of parallel and antiparallel field distribution by applying an in-plane magnetic field. The parallel field profile creates highly mobile vortex channels in a superconducting film deposited on top, reproducing the behavior of a weak link as evidenced by the presence of Shapiro steps in the current-voltage...

Subharmonic gap structure in d-wave superconductors

We present a self-consistent theory of current-voltage characteristics of d-wave/d-wave contacts at arbitrary transparency. In particular, we address the open problem of the observation of subharmonic gap structure ~SGS! in cuprate junctions. Our analysis shows that ~i! the SGS is possible in d-wave superconductors; ~ii! the existence of bound states within the gap results in an even-odd effect...

Superconducting gap structure of FeSe

The microscopic mechanism governing the zero-resistance flow of current in some iron-based, high-temperature superconducting materials is not well understood up to now. A central issue concerning the investigation of these materials is their superconducting gap symmetry and structure. Here we present a combined study of low-temperature specific heat and scanning tunnelling microscopy measuremen...