TMR effect in a FM-QD-FM system

TMR Effect in a FM-QD-FM System

Using the Keldysh nonequilibrium technique, we study current and the tunnelling magnetoresistance (TMR) in a quantum dot coupled to two ferromagnetic leads (FM-dot-FM). The current is calculated for both parallel and antiparallel lead alignments. Coulomb interaction and spin-flip scattering are taken into account within the quantum dot. Interestingly, we find that these interactions play a cont...

Current and Noise in a FM/quantum dot/FM System

F. M. Souza, J. C. Egues and A. P. Jauho 1 Mikroelektronik Centret, Danmarks Tekniske Universitet, DK-2800 Kgs. Lyngby, Denmark 2 Departamento de Fı́sica e Informática, Instituto de Fı́sica de São Carlos, Universidade de São Paulo, 13560-970 São Carlos, São Paulo, Brazil. 3 Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland (Dated: February...

Spin-relaxation and magnetoresistance in FM/SC/FM tunnel junctions

The effect of spin relaxation on tunnel magnetoresistance (TMR) in a ferromagnet/superconductor/ferromagnet (FM/SC/FM) double tunnel junction is theoretically studied. The spin accumulation in SC is determined by balancing of the spin-injection rate and the spin-relaxation rate. In the superconducting state, the spinrelaxation time τs becomes longer with decreasing temperature, resulting in a r...

Use of FM System in cochlear implant Uso do Sistema FM em implante coclear

Accepted: July 15, 2016 Study carried out at Multiprofessional Residency Program in Hearing Health, Audiological Research Center – ARC, Cochlear Implant Section, Hospital of Rehabilitation of Craniofacial Anomalies – HRAC, Universidade de São Paulo – USP Bauru (SP), Brazil. 1 Hospital of Rehabilitation of Craniofacial Anomalies – HRAC, Universidade de São Paulo – USP Bauru (SP), Brazil. 2 Cente...

Fm Transmitter a Antenna