Search for dissertations about: "JOSEPHSON-JUNCTIONS"
Showing result 1 - 5 of 51 swedish dissertations containing the word JOSEPHSON-JUNCTIONS.
-
1. d-wave Josephson Junctions
Abstract : The properties of d-wave YBCO Josephson junctions and dc-SQUIDs with high misorientation angles have beenstudied experimentally .The predominant d-wave symmetry of the pairing wavefunction in high-Tc superconductors has, to a large extent, beena hinderance in applications, but it also makes it possible to fabricate devices with novel properties that may be suitablefor applications in the quantum regime; one particulary interesting property is a strong second harmonic component in the current-phase relation ofjunctions with the electrodes oriented in a node-lobe arrangement; so-called 0-45 junctions. READ MORE
-
2. Fine Scale Microstructures of Josephson Junctions in YBa2Cu3O7-δ Thin Film Structures
Abstract : This work concerns the microstructure of YBa2Cu3O7-.delta. (YBCO) and other related thin films in multilayer structures, studied by mainly transmission electron microscopy (TEM). READ MORE
-
3. Bi2212 intrinsic Josephson junctions, fabrication and high frequency properties
Abstract : The objective for this work was to investigate the high-frequency properties of Bi2212 intrinsic Josephson junctions (IJJ’s). Particularly, the possibility to reach the THz range with a SIS mixer is theoretically promising due to the high energy gap of Bi2212. READ MORE
-
4. High-frequency phenomena in small Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
Abstract : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid to the fabrication of small mesa structures using micro and nanofabrication techniques. READ MORE
-
5. Hybrid Superconductor/Ferromagnet junctions with a strongly ferromagnetic barrier
Abstract : The spin-triplet superconducting state, predicted in superconductor /ferromagnet heterostructures remains one of the most exotic states of nature. It is expected that the triplet state can be switched on/off by changing the relative orientation of magnetization in multilayer Josephson spin-valve structures. READ MORE