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Title: Electronic structure of magnetic semiconductor CdCr{sub 2}Te{sub 4}: A possible spin-dependent symmetry filter

We present a theoretical investigation of the electronic and magnetic structure of spinel CdCr{sub 2}Te{sub 4} using density functional theory, its extensions via onsite Hubbard U interactions, and a screened-hybrid-functional exchange potential. We find that the ground state is semiconducting within the latter approach, and within this magnetic-semiconducting system, we compute the complex band structure, finding a slowly decaying evanescent Δ{sup ~}{sub 1} state possibly suitable for realizing a spin-dependent symmetry filter effect.
Authors:
;  [1] ; ;  [2]
  1. Center for Materials for Information Technology and Department of Physics, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)
  2. Center for Materials for Information Technology and Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)
Publication Date:
OSTI Identifier:
22254139
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DENSITY FUNCTIONAL METHOD; ELECTRONIC STRUCTURE; FILTERS; GROUND STATES; MAGNETIC SEMICONDUCTORS; POTENTIALS; SPIN; SPINELS; SYMMETRY