Spin injection, spin detection, and resonant spin transmission through single and double ferromagnetic/nonmagnetic Esaki barriers

Pedro Pereyra; Dieter Weiss

doi:10.1117/12.2237995

26 September 2016 Spin injection, spin detection, and resonant spin transmission through single and double ferromagnetic/nonmagnetic Esaki barriers

Pedro Pereyra, Dieter Weiss

Author Affiliations +

Proceedings Volume 9931, Spintronics IX; 993124 (2016) https://doi.org/10.1117/12.2237995
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

We study the contact resistance of strongly doped ferromagnetic/non-magnetic semiconductors structure (p⁺ - F/n⁺ -N), working as spin injectors and spin extractors. Because of the strong effect that the barrier shape has on the tunneling probabilities, we evaluate, as accurately as possible, the quantum-mechanical spin-dependent transmission across the Esaki barrier built up at the p-n interface. To simplify the discussion and calculation of transmission coefficients through the Esaki barrier, we concentrate here on the structure p⁺ - F/n⁺ -N, without a stop layer I. We evaluate the spin injection and spin extraction transmission coefficients T↑↑ and T↓↓, and the spin transmission polarization as functions of bias potential, exchange interaction energy and Fermi energy level for specific realizations of the structure p⁺-Ga_1-xMn_xAs/n⁺-GaAs.

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Citation Download Citation

Pedro Pereyra and Dieter Weiss "Spin injection, spin detection, and resonant spin transmission through single and double ferromagnetic/nonmagnetic Esaki barriers", Proc. SPIE 9931, Spintronics IX, 993124 (26 September 2016); https://doi.org/10.1117/12.2237995

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