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Transition metals encapsulated inside single wall carbon nanotubes:DFT calculations

Liu Man Yan Qiang Zhou Li-Ping Han Qin

Transition metals encapsulated inside single wall carbon nanotubes:DFT calculations

Liu Man, Yan Qiang, Zhou Li-Ping, Han Qin
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  • PDF Downloads:  650
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Publishing process
  • Received Date:  05 December 2013
  • Accepted Date:  26 December 2013
  • Published Online:  05 April 2014

Transition metals encapsulated inside single wall carbon nanotubes:DFT calculations

  • 1. Department of Physics and Jiangsu Key Laboratory of thin films, Soochow University, Suzhou 215006, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 11274238, 11104197), and the Qing Lan Project of Jiangsu Higher Education Institutions.

Abstract: The transport properties of a single wall carbon tube with transition metal atoms embedded in it are studied by using the first principles method based on the density functional theory and the nonequilibrium Green’s function. Different transition metal atoms filled in the carbon tube are investigated, and the respective charge and spin transport properties are studied. The conductance of the nanotube is found to be distinctive for different metal elements encapsulated, and quantized reductions of conductance can be seen by a quantum unit (2e2/h). In particular, nanotubes with two iron atoms encapsulated in display different I-V curves when the spins of the two iron atoms are in parallel and antiparallel states respectively. These results can be explained by spin-dependent scattering and charge transfer. The encapsulation may tailor the doping and add magnetic behavior to the carbon nanotubes, which would provide a new and promising approach to detect nanoscale magnetic activity.

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