Sökning: "current blockade"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden current blockade.

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

   Författare :Jonas Bylander; Chalmers tekniska högskola; []
   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. 2. Unconventional Properties of YBCO Thin Films and GB Josephson Devices for Novel Applications

   Författare :Jesper Johansson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; London penetration depth; Coulomb blockade; c-axis transport; YBCO nanowire; SQUID dynamics; unconventional current-phase relation; high-temperature superconductivity; grain-boundary; Single Electron Transistor; intrinsic inductance; tilt-tilt Josephson junctions; YBCO; current injection SQUIDs; nano-lithography; Josephson Junctions;

   Sammanfattning : .... LÄS MER

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

   Författare :Jonas Bylander; Chalmers tekniska högskola; []
   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

5. 4. Interaction effects in the transport of particles in nanowire quantum dots

   Författare :Liney Halla Kristinsdottir; Matematisk fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wigner localization; atom transport; electron transport; ultracold dipolar gases; Quantum dots; semiconductor nanowires; current blockade; thermopower; Fysicumarkivet A:2015:Kristinsdottir;

   Sammanfattning : Interactions between physical bodies constantly affect their properties. This thesis presents a theoretical study on the effects of interaction in few-body nanowire quantum dots. LÄS MER

7. 5. Electromechanical Interactions in Shuttle Systems and Carbon Nanotube Relays

   Författare :Tomas Nord; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coulomb blockade; carbon nanotubes; memory device; nanorelay; single electron tunneling; van der Waals forces; NEMS; shuttle transport; mesoscopic; nanoelectromechanical systems;

   Sammanfattning : In this thesis we theoretically investigate two kinds of nanoscale systems where there is a strong electromechanical coupling, i.e. an intricate relation between the Coulomb forces that can appear in these systems and the displacements of parts of the systems that they cause. LÄS MER