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Modulation of spin‐transport and spin‐minibands in a magnetic superlattice
Author(s) -
Kim Jinwoo,
Kim Heesang,
Kim Nammee
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201147273
Subject(s) - condensed matter physics , spin polarization , superlattice , physics , ballistic conduction , spin (aerodynamics) , spinplasmonics , conductance , spin engineering , magnetic field , spin hall effect , electron , quantum mechanics , thermodynamics
We study the spin miniband structure and the ballistic spin‐polarized transport of a magnetic superlattice (MSL), formed by inhomogeneous magnetic field in a semiconductor nanowire. Based on the transfer matrix theory and Bloch's theorem, we calculate the energy dispersion having spin‐minibands and spin‐minigaps due to Bloch periodicity and spin‐dependent ballistic conductance for various geometrical and physical parameters. Results show that full spin‐polarization in the ballistic conductance of the system occurs clearly for each spin, and that the fully spin‐polarized range for each spin can be enhanced by modulation of geometrical and physical parameters.Schematic diagram of a MSL constructed by superconducting gridded mask on the top of a quantum wire formed by the split gate technique in two‐dimensional electron gas system. Transverse modes in Q1DEG serve as transmission channels.