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Title: Dirac cones in artificial structures of 3d transitional-metals doped Mg-Al spinels

Motivated by recent theoretical predications for Dirac cone in two-dimensional (2D) triangular lattice [H. Ishizuka, Phys. Rev. Lett. 109, 237207 (2012)], first-principles studies are performed to predict Dirac cones in artificial structures of 3d transitional-metals (TM = Ti, V, Cr, Mn, Fe, Co, Ni, and Cu) doped Mg-Al spinels. In investigated artificial structures, TM dopants substitute specific positions of the B sub-lattice in Mg-Al spinel, and form a quasi-2D triangular lattice in the a-b plane. Calculated results illustrate the existence of the spin-polarized Dirac cones formed in d-wave bands at (around) the K-point in the momentum space. The study provides a promising route for engineering Dirac physics in condensed matters.
Authors:
;  [1] ;  [2] ;  [3]
  1. College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071 (China)
  2. School of Physics, Nankai University, Tianjin 300071 (China)
  3. Department of Physics, Tsinghua University, Beijing 100084 (China)
Publication Date:
OSTI Identifier:
22273885
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM COMPOUNDS; COPPER COMPOUNDS; CUBIC LATTICES; D WAVES; DOPED MATERIALS; IRON COMPOUNDS; MAGNESIUM COMPOUNDS; SPIN ORIENTATION; SPINELS; TITANIUM COMPOUNDS