Image-potential states of single- and multiwalled carbon nanotubes

2020-02-05 18:34:10

potential surface nanotubes states angular

责任者: Zamkov, M.;Chakraborty, H.S.;Habib, A.;Woody, N.;Thumm, U.;Richard, P. 单位: Dept. of Phys., Kansas State Univ., Manhattan, KS, USA 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev., B, Condens, Matter Mater. Phys. (USA)),15 Sept. 2004,70(11):115419-1 摘要: The existence of low angular momentum image-potential states is predicted both for single- and multiwalled nanotubes. The states are confined between the self-induced potential on the vacuum side and the surface barrier, created by the central ascent in the transverse nanotube potential. Effective interactions near the surface of the nanotube are modeled with a cylindrical jelliumlike surface barrier, parameterized to ensure the correct transition into the long-range image potential. Binding energies and wave functions are calculated for (12,0), (10,10), (9,0) single-walled and (d=9.48 nm) multiwalled nanotubes for different values of electron angular momenta. In addition, the expected relative lifetimes were calculated for the case of zero-angular momentum states of a (10,10) SWNT. The possible formation of image-potential states in nanotube bundles is briefly discussed 关键词: binding energy;carbon nanotubes;surface potential;surface states;wave functions;image-potential states;single-walled carbon nanotubes;multiwalled carbon nanotubes;self-induced potential;transverse nanotube potential;jelliumlike surface barrier;binding energies;wave functions;electron angular momenta;expected relative lifetime;nanotube bundles;zero-angular momentum states;9.48 nm;C