Multiple-barrier and nanoscale superconducting devices

Abstract

Since the pioneering studies of Josephson and Giaever, the development of electronic devices has been a key research area in superconductivity. In conventional metallic superconductors, highly reliable tunnel junction fabrication techniques have enabled the application of superconducting devices in astronomy and metrology and have allowed the development of large scale integrated circuits for fast digital processing. These sub-micron heterostructure fabrication processes have also made possible the study of superconducting devices containing two or more closely spaced barriers. Such structures allow the investigation of a wide range of novel effects and have led to the development of basic research areas and applications as diverse as electronic cryocoolers, coherent radiation emission and quantum computing. This paper will review the science which can be investigated using multiple-barrier superconducting devices and describe recent progress in the area.

<title>Laser deposition of SmCo thin film on steel substrate</title>

“…SnSe as Gas Sensors, YBaCuO or BiSrCaCuO thin films with different stoichiometric ratio between elements 3,4,5 , typically bolometric apparatus and so on. A lot of papers address the potentiality to fabricate magnetic nanostructures useful for many electronics applications, like high capacity memory support, sensors and actuators, and new spintronic valves 6,7 . An unexplored field of sensor applications is the use in chemically reactive or hostile environment (combustion) for monitoring spatial position and lifting of mechanical parts.…”

Proximity-reduced range of internal phase differences in double Josephson junctions with closely spaced interfaces

“…Static and dynamic couplings of two closely spaced junctions can play an important role in mesoscopic systems of superconducting electronics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Two Josephson junctions connected in series are particularly linked to each other by the equality of the flowing currents.…”

Fabrication and Properties of High-$T_{\rm c}$ YBCO Josephson Junction and SQUID With Variable Thickness Bridges by Focused Ion Beam

“…However, the spreads in junction parameters are quite large and hence they are not suitable for the device consisting of many junctions [3]. To overcome these drawbacks, some methods for making the junction from a micro-bridge were proposed, such as locally ion-damaged junction [5], [6], nano-junction [7], [8], and the variable-thickness bridge (VTB) junction. The first experiment on VTB done by Gubankov et al demonstrated Josephson properties at the temperature close to [9].…”

“…Simulations based on the transport of ions in matter: (TRIM) software indicate that the penetration depth of ions into the YBCO film without a protective layer on top was around 30 nm. However, the average implantation depth is 10-20 nm inward from the surface of the film; 0.1% of ions are implanted as far as 40 nm inward from the surface of the structure [7], [8]. The effect of irradiation induced damage on the electrical transport properties were characterized by the resistance-temperature curve measure with the four-point method.…”