Sökning: "Coulomb repulsion"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Coulomb repulsion.

  1. 1. Three-Dimensional Metal-Semiconductor Heterostructures for Device Applications

    Detta är en avhandling från Lars-Erik Wernersson Norbergsg. 3 223 54 Lund

    Författare :Lars-Erik Wernersson; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [1998]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Schottky contacts; space-charge spectroscopy; ballistic transport; Coulomb repulsion; electron interference; resonant tunnelling; lateral confinement; heterojunction permeable base transistor; resonant tunnelling diodes; Fysicumarkivet A:1998:Wernersson; Fysik; Physics; resonant tun; epitaxial overgrowth;

    Sammanfattning : Fabrication and characterisation of buried metal contacts in compound semiconductors are demonstrated. The contacts have been investigated due to their usage both as gates in transistors and as active or passive elements in novel devices. LÄS MER

  2. 2. Current measurement by real-time counting of single charges

    Detta är en avhandling från Lars-Erik Wernersson Norbergsg. 3 223 54 Lund

    Författare :Jonas Bylander; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; array of tunnel junctions; Coulomb blockade; radio frequency single electron transistor; SET oscillations; time correlated tunnelling; metrology; current standard; SET; charge solitons;

    Sammanfattning : The first real-time observation of time correlated single-electron tunnelling is reported in this thesis. This is a direct detection of charge discreteness in an electrical current.When a current, I, flows through a chain of metallic islands, connected by small tunnel junctions, a lattice of charges is formed due to the Coulomb repulsion. LÄS MER

  3. 3. Time-resolved detection of temporally correlated, single-charge tunnelling

    Detta är en avhandling från Lars-Erik Wernersson Norbergsg. 3 223 54 Lund

    Författare :Jonas Bylander; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Josephson junctions; time-correlated tunnelling; radio-frequency single-electron transistor; current standard; charge solitons; SET oscillations; Coulomb blockade; metrology; SET; tunnel junction array;

    Sammanfattning : We report real-time detection of the single charges that constitute a small electrical current, as they flow through a nano-electronic device. This represents a direct demonstration of charge discreteness in an electrical current. LÄS MER

  4. 4. Electrical Studies of Quantum Devices

    Detta är en avhandling från Solid State Physics, Lund University

    Författare :Sven-Bertil Carlsson; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Single electron transistor; Resonant tunneling diode; Quantized conductance; In situ measurements; Coulomb blockade Ratchet; Fysicumarkivet A:1999:Carlsson; Fysik; Physics;

    Sammanfattning : This thesis deals with electrical measurements on quantum devices. The thesis is divided into three major areas: electrical characterization, semiconductor devices, and metal devices. The electrical characterization part present problems and advantages with the measurement techniques used in the the thesis, .i. LÄS MER

  5. 5. Studies on hybrid superconducting junctions

    Detta är en avhandling från Solid State Physics, Lund University

    Författare :Cecilia Holmqvist; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Critical Current; Single-Electron Box; Attractive Correlations; Josephson Junction; Negative Charging Energy; Quasiclassical Superconductivity; Josephson Current;

    Sammanfattning : In the field of nanoelectronics, one seeks to combine quantum mechanical effects with macroscopic entities such as currents in order to find new ways of storing and manipulating information. One possibility to accomplish this is to use the quantum correlations found in superconductors. LÄS MER