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

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4865589· OSTI ID:22283178

Guo, Yan-Dong; Yan, Xiao-Hong ^[1]; Xiao, Yang ^[1]

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1. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)

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.

• OSTI ID: 22283178
• Journal Information: Applied Physics Letters, Vol. 104, Issue 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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