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Study on the spin polarization of a current through a hybrid resonant tunneling diode
Author(s) -
Li Ming Kai,
Kang Tae Won,
Kim Nammee
Publication year - 2010
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.201000007
Subject(s) - condensed matter physics , spin polarization , quantum tunnelling , resonant tunneling diode , common emitter , magnetic field , ferromagnetism , fermi energy , spintronics , polarization (electrochemistry) , physics , quantum well , optoelectronics , electron , chemistry , optics , quantum mechanics , laser
The effects of spin‐splitting energy and temperature on the electric transport properties through a hybrid resonant tunneling diode (RTD) with ferroelectric barriers and a diluted magnetic semiconductor (DMS) quantum well are studied by using the non‐equilibrium Green's function method. The results show that the period of spin polarization oscillation as a function of a bias voltage increases by increasing the spin‐splitting energy of the DMS quantum well. The spin polarization of the current near the Fermi level is highly influenced by a change in temperature. The RTD with a ferromagnetic quantum well is more efficient than that with a ferromagnetic emitter to manipulate the spin direction of the current and to enhance the spin polarization of the current without changing the direction of an external magnetic field.