Search for dissertations about: "Andreev tunneling"

Showing result 1 - 5 of 9 swedish dissertations containing the words Andreev tunneling.

  2. 1. Parity Effects in Single Charge Tunneling

    Author : Magnus Gisselfält; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mesoscopic; single charge tunneling; photon-assisted tunneling; shot noise; SET transistor; parity effect; Andreev tunneling; Coulomb blockade;

    Abstract : The subject of this thesis is single charge tunneling effects, especially parity effects, as they are manifested in quantum mechanical tunneling through a metallic island small enough to cause single electrons to block tunneling of other electrons due to Coulomb interaction. When the island is superconducting the ground state energy depends on the parity of the number of electrons on the island: outside of the condensate there will always be at least one electron contributing to the energy for an odd number of electrons and this will have observable consequences. READ MORE

  4. 2. Collective Electron Dynamics in Mesoscopic Systems

    Author : Oleksandr Zazunov; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Andreev reflection; Josephson effect; qubit; composite fermions; Andreev levels; resonant tunneling; superconductivity; high-T c superconductors; quantum point contact; fractional quantum Hall effect;

    Abstract : This work is devoted to a theoretical investigation of collective electron dynamics in low dimensional materials and mesoscopic structures. A common feature of these studies is the focus on the properties of the low energy dynamics of conduction electrons. One class of studied materials is the high-Tc superconductor Nd2CuO4 and related compounds. READ MORE

  5. 3. Dissipative Processes in Superconducting Diffusive Tunnel Junctions

    Author : Andrey Vasenko; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Josephson effect; Andreev bound states; nonequilibrium superconductivity; superconducting junctions; transport processes; tunneling; diffusive superconductors;

    Abstract : A central subject of this thesis is the dissipative current transport in superconducting tunnel junctions with diffusive electrodes. Tunnel current transport in superconducting junctions is a classical topic of interest and research. READ MORE

  6. 4. Small superconducting junctions or numerical experiments on multiple Andreev reflections

    Author : Göran Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bogoliubov-de Gennes equation; resonant tunneling; superconducting junctions; superconductivity; Josephson effect; voltage biased; BCS theory;

    Abstract : .... READ MORE

  7. 5. Multiple Andreev Reflection - a Microscopic Theory of ac Josephson Effect in Mesoscopic Junctions

    Author : Göran Johansson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; high-Tc superconductors; d-wave symmetry; superconducting junctions; resonant tunneling; ac Josephson effect; mesoscopic superconductivity;

    Abstract : The mechanism of multiple Andreev reflection (MAR) is a microscopic theory for electron transport in voltage biased superconducting junctions, i.e. the ac Josephson effect. In this thesis we propose a new approach for calculating the dc current from MAR. READ MORE