Long-lived nanosecond spin coherence in high-mobility 2DEGs confined in double and triple quantum wells

Autor(es)

Ullah, S. ^[1] ; Gusev, G. M. ^[1] ; Bakarov, A. K. ^{[2, 3]} ; Hernandez, F. G. G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, Caixa Postal 66318, BR-05315970 Sao Paulo, SP - Brazil

^[2] Novosibirsk State Univ, Novosibirsk 630090 - Russia

^[3] Inst Semicond Phys, Novosibirsk 630090 - Russia

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 119, n. 21 JUN 7 2016.
• Citações Web of Science: 8

Resumo

We investigated the spin coherence of high-mobility two-dimensional electron gases confined in multilayer GaAs quantum wells. The dynamics of the spin polarization was optically studied using pump-probe techniques: time-resolved Kerr rotation and resonant spin amplification. For double and triple quantum wells doped beyond the metal-to-insulator transition, the spin-orbit interaction was tailored by the sample parameters of structural symmetry (Rashba constant), width, and electron density (Dresselhaus linear and cubic constants) which allow us to attain long dephasing times in the nanoseconds range. The determination of the scales, namely, transport scattering time, single-electron scattering time, electron-electron scattering time, and spin polarization decay time further supports the possibility of using n-doped multilayer systems for developing spintronic devices. Published by AIP Publishing. (AU)

• Processo FAPESP: 13/03450-7 - O efeito Hall de spin em semicondutores
• Beneficiário: Felix Guillermo Gonzalez Hernandez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/15007-5 - Dinâmica do magnetismo em nanocristais semicondutores
• Beneficiário: Felix Guillermo Gonzalez Hernandez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/25981-7 - Geração e mapeamento espacial e temporal de correntes de spin
• Beneficiário: Felix Guillermo Gonzalez Hernandez
• Modalidade de apoio: Auxílio à Pesquisa - Regular