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Title: The spin-dependent transport of Co-encapsulated Si nanotubes contacted with Cu electrodes

Unlike carbon nanotubes, silicon ones are hard to form. However, they could be stabilized by metal-encapsulation. Using first-principles calculations, we investigate the spin-dependent electronic transport of Co-encapsulated Si nanotubes, which are contacted with Cu electrodes. For the finite tubes, as the tube-length increases, the transmission changes from spin-unpolarized to spin-polarized. Further analysis shows that, not only the screening of electrodes on Co's magnetism but also the spin-asymmetric Co-Co interactions are the physical mechanisms. As Cu and Si are the fundamental elements in semiconductor industry, our results may throw light on the development of silicon-based spintronic devices.
Authors:
;  [1] ;  [2] ;  [1]
  1. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22283178
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 6; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON NANOTUBES; COBALT; COPPER; ELECTRODES; MAGNETISM; SEMICONDUCTOR MATERIALS; SILICON; SPIN; SPIN ORIENTATION; VISIBLE RADIATION