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Showing 1 to 20 of 190 for “"Josephson"”.
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Nanoscale Josephson Devices
… of materials, including the study of c-axis Josephson junctions in the high temperature superconductor Tl2Ba2CaCu2O8, the fabrication of superconducting quantum interference devices with sub-micron loop areas, and GaN light emitting diodes. The main body of research was carried out in the …
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Multi-terminal Josephson effect
Conventionally, a Josephson junction is an ubiquitous quantum device formed by a weak link between a pair of superconductors. In this work, we demonstrate the dc Josephson effect in mesoscopic junctions of more than two superconducting terminals. We report fabrication and characterization of the 3- …
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Quantum transport in Josephson junctions
Josephson junctions consist of two superconductors separated by some barrier, be it superconducting, ferromagnetic, or semiconducting. The striking feature of Josephson junctions is that for a phase difference between the two superconducting reservoirs, electrical current will flow between them. To …
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Cryogenic characterization of Josephson junctions
… of a superconducting quantum device, the Josephson junction. This thesis begins with a theoretical description of superconductivity and Josephson junctions, two superconductors separated by a thin insulating battier. Two models of Josephson barriers are presented for use in analysis. The …
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Thermal activation of superconducting Josephson junctions
… for scalable quantum computing architectures. Josephson junctions are extensively used in superconducting quantum interference devices (SQUIDs) and in persistent-current qubit systems. Noise excitations, however, have a critical influence on their dynamics. Thus, the primary focus of this …
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Josephson Junctions Fabricated by Focussed Ion Beam
… recent work on an innovative new approach to Josephson junction fabrication. These junctions are created in low TC superconductor-normal metal bilayer tracks on a deep submicron scale using a Focused Ion Beam Microscope (FIB). The FIB is used to mill away a trench 50_nm wide in the upper layer …
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Rapid fabrication of deep-submicron Josephson junctions
A process was designed to fabricate Nb-AlOx-Nb Josephson junctions for quantum computing applications, with the goal of fabricating junctions as small as 0.2 [micro]m in diameter in a time span of roughly two weeks. The process was based on the doubly-planarized all-refractory technology for …
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Digital frequency-division multiplexing using Josephson junctions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Boson Josephson Junctions based on Exciton-Polariton Condensates
… dissertation is a theoretical treatise on the Josephson effect in dilute quantum gases of excitons and exciton-polaritons. An exciton is a kind of elementary excitation in semiconductors, which, through strong coupling with photons, can form a light-matter hybrid particle called an …
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Existence de solutions périodiques de l'équation de Josephson
… des solutions périodiques de l’équation de Josephson. La première partie est consacrée au rappel des notions de base de l’espace L[exposant]2[indice]T et de quelques théorèmes fondamentaux sur les points fixes. Par la suite, après avoir défini le cadre d ’étude, nous établirons à l’aide du …
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Superconducting Electron Transport in Graphene-Based Josephson Junctions
… (superconducting-normal-superconducting), or “Josephson” junctions. It was found that superconducting current (“supercurrent”) could flow through the normal (i.e. non-superconducting) graphene regions. The mechanism of this supercurrent is not fully explored. In this work, we study the …
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Phase-sensitive probes of extended topological Josephson junctions
… progress has been made in studying the Josephson effect in topological-insulator-based systems. The Josephson junction formed by a topological insulator in proximity to two superconductors (S-TI-S) is predicted to exhibit 4π-periodic signatures in the Josephson phase due to MBSs. We …
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Nonlinear dynamics of two-dimensional Josephson junction arrays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Vortex motion and dynamical states in Josephson arrays
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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A Josephson junction bridge track and hold circuit
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Nonlinear dynamics of one-dimensional Josephson junction arrays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1995.
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Steuerung von Nb-2DEG-Nb Josephson-Kontakten mittels Strominjektion
… hybrid structures JOFET (Josephson Field Effect Transistor) had been created there has been a huge interest in controlled Josephson junctions. The idea of the JOFET is to control the supercurrent by changing the electron concentration in the two-dimensional electron gas …
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