Open AccessTransition metals encapsulated inside single wall carbon nanotubes：DFT calculations
Author(s) -
Man Liu,
Qiang Yan,
Liping Zhou,
Han Qin
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.077302
Subject(s) - materials science , carbon nanotube , conductance , density functional theory , spins , transition metal , metal , antiparallel (mathematics) , doping , magnetic moment , condensed matter physics , chemical physics , ferromagnetism , non equilibrium thermodynamics , nanotechnology , magnetic field , computational chemistry , physics , thermodynamics , chemistry , biochemistry , optoelectronics , quantum mechanics , metallurgy , catalysis
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.