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Hamaya K, Kitabatake M, Shibata K, et al. Spin-related current suppression in a semiconductor quantum dot spin-diode structure. Phys Rev Lett. 2009;102(23):236806doi: 10.1103/PhysRevLett.102.236806.
Hamaya, K., Kitabatake, M., Shibata, K., Jung, M., Ishida, S., Taniyama, T., Hirakawa, K., Arakawa, Y., & Machida, T. (2009). Spin-related current suppression in a semiconductor quantum dot spin-diode structure. Physical review letters, 102(23), 236806. https://doi.org/10.1103/PhysRevLett.102.236806
Hamaya, K, et al. "Spin-related current suppression in a semiconductor quantum dot spin-diode structure." Physical review letters vol. 102,23 (2009): 236806. doi: https://doi.org/10.1103/PhysRevLett.102.236806
Hamaya K, Kitabatake M, Shibata K, Jung M, Ishida S, Taniyama T, Hirakawa K, Arakawa Y, Machida T. Spin-related current suppression in a semiconductor quantum dot spin-diode structure. Phys Rev Lett. 2009 Jun 12;102(23):236806. doi: 10.1103/PhysRevLett.102.236806. Epub 2009 Jun 12. PMID: 19658960.
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Phys Rev Lett. 2009 Jun 12;102(23):236806. doi: 10.1103/PhysRevLett.102.236806. Epub 2009 Jun 12.

Spin-related current suppression in a semiconductor quantum dot spin-diode structure.

Physical review letters

K Hamaya, M Kitabatake, K Shibata, M Jung, S Ishida, T Taniyama, K Hirakawa, Y Arakawa, T Machida

Affiliations

  1. Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan. [email protected]

PMID: 19658960 DOI: 10.1103/PhysRevLett.102.236806

Abstract

We experimentally study the transport features of electrons in a spin-diode structure consisting of a single semiconductor quantum dot (QD) weakly coupled to one nonmagnetic and one ferromagnetic (FM) lead, in which the QD has an artificial atomic nature. A Coulomb stability diamond shows asymmetric features with respect to the polarity of the bias voltage. For the regime of two-electron tunneling, we find anomalous suppression of the current for both forward and reverse bias. We discuss possible mechanisms of the anomalous current suppression in terms of spin blockade via the QD-FM interface at the ground state of a two-electron QD.

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