@inproceedings{b719b423f644484cafd60590a7f8246b,
title = "Negative magnetoresistance in quantum-dot spin valve in cotunneling regime",
abstract = "The transport through a quantum-dot spin valve is theoretically examined when an electron spin 1/2 is localized in the quantum dot by the Coulomb blockade. The cotunneling current by the second-order tunnel processes is evaluated. We show that spin-flip cotunneling processes result in a negative magnetoresistance, which means that the conductance is larger in the antiparallel (AP) alignment of the magnetization in the ferromagnets than in the parallel (P) alignment, when double tunnel barriers are largely asymmetric. In the presence of Zeeman splitting in the quantum dot, the differential conductance can show a larger peak in the AP alignment when the bias voltage is matched to the splitting.",
keywords = "Coulomb blockade, cotunneling, quantum dot, spin valve",
author = "Shogo Naya and Mikio Eto",
year = "2011",
doi = "10.1063/1.3666563",
language = "English",
isbn = "9780735410022",
series = "AIP Conference Proceedings",
pages = "687--688",
booktitle = "Physics of Semiconductors - 30th International Conference on the Physics of Semiconductors, ICPS-30",
note = "30th International Conference on the Physics of Semiconductors, ICPS-30 ; Conference date: 25-07-2010 Through 30-07-2010",
}