Koller, Sonja and Grifoni, Milena and Paaske, Jens (2012) Sources of negative tunneling magnetoresistance in multilevel quantum dots with ferromagnetic contacts. PHYSICAL REVIEW B, 85 (4): 045313. ISSN 1098-0121,
Full text not available from this repository.Abstract
We analyze distinct sources of spin-dependent energy level shifts and their impact on the tunneling magnetoresistance (TMR) of interacting quantum dots coupled to collinearly polarized ferromagnetic leads. Level shifts due to virtual charge fluctuations can be quantitatively evaluated within a diagrammatic representation of our transport theory. The theory is valid for multilevel quantum dot systems and we exemplarily apply it to carbon nanotube quantum dots, where we show that the presence of many levels, among them of excited states, can qualitatively influence the TMR effect.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SPIN TRANSPORT; |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 May 2020 09:59 |
| Last Modified: | 20 May 2020 09:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19369 |
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