Open AccessSpin polarized transport of two-dimensional electron gas through step-magnetic barrier structure
Author(s) -
Tang Zhen-Kun,
Lingling Wang,
Tang Li-Ming,
You Kai-Ming,
Bing-Song Zou
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5899
Subject(s) - spin polarization , condensed matter physics , electron , polarization (electrochemistry) , biasing , spin (aerodynamics) , voltage , materials science , scattering , fermi gas , range (aeronautics) , physics , optics , chemistry , quantum mechanics , thermodynamics , composite material
By using the scattering matrix method, the properties of two-dimensional electron gas spin polarized transport through step-magnetic barrier structure at different bias voltage are investigated. The results show that (i) the degree of spin polarization is cyclically reducing if the incidence energy increases at zero bias voltage, and (ii) it is reduced slower and the maximum of spin polarization decreases when the number of steps increase in this structure, and (iii) it is enhanced significantly in a wider energy range under applied bias voltage, and more distinct spin-filtering properties are observed in the step-magnetic barriers.