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Coaxial Quantum Well Wires in Magnetic/Nonmagnetic Heterostructures
Author(s) -
Sangtawee Jakkrit,
Srikom Watcharakorn,
Amthong Attapon
Publication year - 2018
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.201800005
Subject(s) - condensed matter physics , heterojunction , zeeman effect , electron , coaxial , quantum well , quantum wire , semiconductor , magnetic field , ballistic conduction , effective mass (spring–mass system) , spin (aerodynamics) , physics , spin polarization , materials science , quantum mechanics , laser , engineering , electrical engineering , thermodynamics
We propose a coaxial cylindrical quantum well wire which is composed of layers of a dilute magnetic semiconductor (DMS) and a nonmagnetic semiconductor (NMS). Using effective mass approximation, we present a numerical calculation of the eigenenergies and eigenstates of electrons in the heterostructure. The variation of the spin‐dependent energy levels is influenced by the giant Zeeman splitting and potential energies due to a vector potential for sufficiently low and high magnetic fields, respectively. It is found that crossing and anticrossing behaviors of energy levels can be controlled by the thickness of a NMS layer. The ballistic transport of the structure is also investigated. The ranges of the Fermi energy for obtaining full spin polarization are suggested in this work.