Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-12-06
Phys. Rev. B 77, 075305 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevB.77.075305
Spin-dependent transport through a multilevel quantum dot weakly coupled to ferromagnetic leads is analyzed theoretically by means of the real-time diagrammatic technique. Both the sequential and cotunneling processes are taken into account, which makes the results on tunnel magnetoresistance (TMR) and shot noise applicable in the whole range of relevant bias and gate voltages. Suppression of the TMR due to inelastic cotunneling and super-Poissonian shot noise have been found in some of the Coulomb blockade regions. Furthermore, in the Coulomb blockade regime there is an additional contribution to the noise due to bunching of cotunneling processes involving the spin-majority electrons. On the other hand, in the sequential tunneling regime TMR oscillates with the bias voltage, while the current noise is generally sub-Poissonian.
Barnas Jozef
Weymann Ireneusz
No associations
LandOfFree
Shot noise and tunnel magnetoresistance in multilevel quantum dots: Effects of cotunneling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Shot noise and tunnel magnetoresistance in multilevel quantum dots: Effects of cotunneling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shot noise and tunnel magnetoresistance in multilevel quantum dots: Effects of cotunneling will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-91860