Experimental investigation of spin-orbit coupling in <i>n</i>-type PbTe quantum wells
M. L. PeresInstitute of Physics and Chemistry, Federal University of Itajubá 1 , PB 50, 37500-903 Itajubá, MG, BrazilH. MonteiroInstitute of Physics and Chemistry, Federal University of Itajubá 1 , PB 50, 37500-903 Itajubá, MG, BrazilV. A. ChittaInstitute of Physics, University of São Paulo 2 , PB 66318, 05315-970 São Paulo, SP, BrazilS. de CastroInstitute of Physics and Chemistry, Federal University of Itajubá 1 , PB 50, 37500-903 Itajubá, MG, BrazilU. A. MenguiLaboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, PB 515 3 , 12201-970 São José dos Campos, SP, BrazilP. H. O. RapplLaboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, PB 515 3 , 12201-970 São José dos Campos, SP, BrazilN. F. OliveiraInstitute of Physics, University of São Paulo 2 , PB 66318, 05315-970 São Paulo, SP, BrazilE. Abramof4Grenoble High Magnetic Field Laboratory, CNRS, BP 166, 38042 Grenoble Cedex 9, FranceD. K. MaudeGrenoble High Magnetic Field Laboratory 4 , CNRS, BP 166, 38042 Grenoble Cedex 9, France
2014en
ABI
Аннотация
The spin-orbit coupling is studied experimentally in two PbTe quantum wells by means of weak antilocalization effect. Using the Hikami-Larkin-Nagaoka model through a computational global optimization procedure, we extracted the spin-orbit and inelastic scattering times and estimated the strength of the zero field spin-splitting energy Δso. The values of Δso are linearly dependent on the Fermi wave vector (kF) confirming theoretical predictions of the existence of large spin-orbit coupling in IV-VI quantum wells originated from pure Rashba effect.
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