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Title: Electrical switching effect of a single-unit-cell CrO{sub 2} layer on rutile TiO{sub 2} surface

Rutile CrO{sub 2} is the most important half-metallic material with nearly 100% spin polarization at the Fermi level, and rutile TiO{sub 2} is a wide-gap semiconductor with many applications. Here, we show through first-principles investigation that a single-unit-cell CrO{sub 2} layer on rutile TiO{sub 2} (001) surface is ferromagnetic and semiconductive with a gap of 0.54‚ÄČeV, and its electronic state transits abruptly to a typical metallic state when an electrical field is applied. Consequently, this makes an interesting electrical switching effect which may be useful in designing spintronic devices.
Authors:
 [1] ;  [2] ;  [1]
  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  2. (United States)
Publication Date:
OSTI Identifier:
22258599
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHROMIUM OXIDES; FERMI LEVEL; RUTILE; SEMICONDUCTOR MATERIALS; SPIN ORIENTATION; SURFACES; TITANIUM OXIDES