Thumbnail
Access Restriction
Open

Author Adinehloo, Davoud ♦ Fathipour, Morteza
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ DEFORMATION ♦ ELECTRIC FIELDS ♦ GRAPHENE ♦ GREEN FUNCTION ♦ HUBBARD MODEL ♦ MAGNETIC FIELDS ♦ MAGNETORESISTANCE ♦ NANOSTRUCTURES ♦ SPIN ♦ SPIN ORIENTATION
Abstract The aim of this report is to unfold how the thermo-electric spin-polarized current in a transverse-biased zigzag graphene nanoribbon changes in the presence of uniaxial deformations and uniform perpendicular magnetic field. Employing the two-parameter Hubbard model along with the non-equilibrium Green's function formalism, we found that both uniaxial strain and magnetic field can significantly modulate the bandgap, local distribution of edge states, and the critical transverse electric field needed to achieve the half-metallic phase in the ribbon. Our analysis shows a significant enhancement of the maximum attainable spin-polarized current as functions of both source temperature and contacts temperature difference, with increasing the magnetic field or applying any magnitude of compressive strain. Furthermore, it is shown that the magneto-resistance ratio of the device, can be drastically tuned via strain engineering, reaching values as high as 2 × 10{sup 4}% for compressive strains of 5% magnitude.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 23


Open content in new tab

   Open content in new tab