Half-metallic semi-Dirac-point generated by quantum confinement in TiO2/VO2 nanostructures
Multilayer VO_{2}/TiO_{2} nanostructures (d;{1}-d;{0} 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 unprecedente...
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| Published in | Physical review letters Vol. 102; no. 16; p. 166803 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
24.04.2009
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| Online Access | Get more information |
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| Summary: | Multilayer VO_{2}/TiO_{2} nanostructures (d;{1}-d;{0} 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. |
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| ISSN: | 0031-9007 |
| DOI: | 10.1103/PhysRevLett.102.166803 |