Effects of an in-plane magnetic field on the energy dispersion, spin texturing and conductance of double quantum wires


Gisi B., Karaaslan Y., Sakiroglu S., Kasapoglu E. , Sari H. , Sokmen I.

SUPERLATTICES AND MICROSTRUCTURES, cilt.91, ss.391-400, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 91
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.spmi.2015.12.032
  • Dergi Adı: SUPERLATTICES AND MICROSTRUCTURES
  • Sayfa Sayıları: ss.391-400

Özet

We investigate the electronic structure, spin and transport properties of double quantum wires formed by a symmetric, double quartic-well potential subjected to an in-plane magnetic field by taking into account Rashba and Dresselhaus spin-orbit couplings. The energy dispersion relation of the system is analyzed for different strengths of spin-orbit interactions, magnitude and direction of magnetic field. Our numerical results reveal that the existence of aforementioned parameters modifies strongly the energy band structure, introduces a wave vector dependence to energies and also leads to crossings and anticrossings between subbands. This complex structure of energy dispersion gives rise to the appearance of square-wave like oscillations in the conductance. The spin-orbit couplings, magnetic field, potential profile and Fermi energy of an electron significantly affect the depth and width of conductance steps. Moreover, we found that the competing effect between spin-orbit couplings and magnetic field leaves its marks on the spin texturing. (C) 2015 Elsevier Ltd. All rights reserved.