Sökning: "I-V current -voltage"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden I-V current -voltage.

1. 1. Parity Effects in Single Charge Tunneling

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

   Sammanfattning : 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. LÄS MER

3. 2. Shuttle Transport of Charge in Normal and Superconducting Nanostructures

   Författare :Andreas Isacsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Josephson effect; superconductivity; nanoelectromechanics NEMS ; single electron tunneling; coulomb blockade;

   Sammanfattning : In nanoscale systems, accumulation of charge is associated with large charging energies. If the forces arising due to the Coulomb interaction are comparable to the rigidity of the structures mechanical deformations can couple to the electronic degrees of freedom. LÄS MER

4. 3. Effects of Coherence and Correlations on Transport through Nanostructures

   Författare :Olov Karlström; Matematisk fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2012:Karlström;

   Sammanfattning : This dissertation deals with the effects of coherence and correlations on transport through nanostructures. Simulations are mainly performed using the second order von Neumann approach, a method capable of dealing with these effects in the presence of higher order tunneling. LÄS MER

5. 4. Spin momentum transfer effects for spintronic device applications

   Författare :Yan Zhou; Johan Åkerman; Daniel E. Bürgler; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spin Torque Oscillator; Giant Magnetoresistance; Tunneling Magnetoresistance; Magnetism; Magnetism;

   Sammanfattning : The recent discovery that a spin-polarized current can exert a large torque on a ferromagnet, through direct transfer of spin angular momentum, offers the possibility of electrical current controlled manipulation of magnetic moment in nanoscale magnetic device structures. This so-called spin torque effect holds great promise for two applications, namely, spin torque oscillators (STOs) for wireless communication and radar communication, and spin transfer torque RAM (STT-RAM) for data/information storage. LÄS MER

7. 5. Blended cognitive behavior therapy : efficacy and acceptability for treating depression in the adult and adolescent population

   Författare :Naira Topooco; Gerhard Andersson; Lise Bergman Nordgren; Heather O’Mahen; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; acceptance; adolescents; adults; blended treatment; cognitive behavioral therapy; depression; digital; internet-delivered; e-mental health; stakeholders; technology-assisted; acceptans; blended; kognitiv beteendeterapi; KBT; depression digital; internetbehandling;

   Sammanfattning : Depression is the most burdensome disorder worldwide in terms of health loss. The potential of internet and technologies to scale up psychological treatment resources is substantial. LÄS MER