corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 102 » Issue 16
< Previous Article | Next Article >

Phys. Rev. Lett. 102, 166803 (2009) [4 pages]

Half-Metallic Semi-Dirac-Point Generated by Quantum Confinement in TiO2/VO2 Nanostructures

Download: PDF (866 kB) Buy this article Export: BibTeX or EndNote (RIS)

Victor Pardo1,2 and Warren E. Pickett1
1Department of Physics, University of California, Davis, California 95616, USA
2Departamento de Física Aplicada, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain

Received 10 February 2009; published 22 April 2009

See accompanying Physics Synopsis

Multilayer VO2/TiO2 nanostructures (d1-d0 interfaces with no polar discontinuity) are studied with first-principles density functional methods including structural relaxation. Quantum confinement of the half-metallic VO2 slab within insulating TiO2 produces an unexpected and unprecedented two-dimensional new state, with a (semi-Dirac) point Fermi surface: spinless charge carriers are effective-mass-like along one principal axis but are massless along the other. Effects of interface imperfection are addressed.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.166803
DOI:
10.1103/PhysRevLett.102.166803
PACS:
73.20.−r, 75.70.Cn, 79.60.Jv
 
< Previous Article | Next Article >