Phase-breaking effects in double-barrier resonant tunneling diodes with spin-orbit interaction

Goran Isić, Dragan Indjin, Vitomir Milanović, Jelena Radovanović, Zoran Ikonić, Paul Harrison

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Several recent theoretical studies showed that the spin-orbit interaction in narrow gap InGaAs/InAlAs double-barrier resonant tunneling structures might yield a highly spin-polarized current in the ballistic limit. In this paper, a nonequilibrium Green's function model is used to examine the effect of phase-breaking on the spin-dependent transport of carriers. The scattering is described as a local interaction with a bath of scatterers and treated in the self-consistent first Born approximation. Elastic and inelastic scatterers, with scattering strengths that cause a few millielectron volt broadening of quasibound states, have been found to significantly reduce the spin polarization. The magnitude of spin polarization has been found to be dominantly determined by the quasibound state broadening, while the interaction details are not significant.

Original languageEnglish
Article number044506
JournalJournal of Applied Physics
Issue number4
Publication statusPublished - 15 Aug 2010
Externally publishedYes


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