Electric-field inversion asymmetry: Rashba and Stark effects for holes in resonant tunneling devices

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Electric-field inversion asymmetry: Rashba and Stark effects for holes in resonant tunneling devices

H. B. de Carvalho, M. J. S. P. Brasil, V. Lopez-Richard, Y. Galvão Gobato, G. E. Marques, I. Camps, L. C. O. Dacal, M. Henini, L. Eaves, and G. Hill

Phys. Rev. B 74, 041305(R) – Published 18 July 2006

Abstract

We report electric-field-induced modulation of the spin splitting during the charging and discharging processes of a $p$ -type $GaAs ∕ AlAs$ double-barrier resonant-tunneling diode under an applied bias and magnetic field. In addition to the conventional Zeeman effect, we find experimental evidence of excitonic spin splitting produced by a combination of the Rashba spin-orbit interaction, the Stark effect, and the charge accumulation. The abrupt changes in the photoluminescence with the applied bias provide information about charge accumulation effects in the device.

Received 19 January 2006

DOI:https://doi.org/10.1103/PhysRevB.74.041305

Authors & Affiliations

H. B. de Carvalho¹, M. J. S. P. Brasil², V. Lopez-Richard^3,*, Y. Galvão Gobato⁴, G. E. Marques⁴, I. Camps⁴, L. C. O. Dacal⁵, M. Henini⁶, L. Eaves⁶, and G. Hill⁷

¹Instituto Nacional de Telecomunicações, 37540-000, Santa Rita do Sapucaí, MG, Brazil
²Grupo de Propriedades Ópticas, Instituto de Física Gleb Wataghin, Universidade de Campinas, 13083-970, Campinas, São Paulo, Brazil
³Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Departamento de Física e Matemática, Universidade de São Paulo, 14040-901, Ribeirão Preto, São Paulo, Brazil
⁴Universidade Federal de São Carlos, Departamento de Física, 13560-905, São Carlos, São Paulo, Brazil
⁵Instituto de Estudos Avançados, IEAv-CTA, Caixa Postale 6044, 12231-970, São José dos Campos, São Paulo, Brazil
⁶School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
⁷EPSRC National Centre for III-V Technologies, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom

^*Electronic address: vlopez@df.ufscar.br

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Issue

Vol. 74, Iss. 4 — 15 July 2006

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