Title :
Supercurrents through diffusive multi-walled carbon nanotubes
Author :
Haruyama, J. ; Miyadai, S. ; Takazawa, K. ; Takeda, A. ; Hori, N. ; Takesue, I. ; Akazaki, T. ; Takayanagi, H.
Author_Institution :
Aoyama Gakuin Univ., Kanagawa, Japan
Abstract :
We report on observations of supercurrents through multi-walled carbon nanotubes (MWNTs) in a diffusive carrier transport regime, which possesses weak localization, in niobium (Nb)/diffusive MWNTs/aluminum(Al) junction systems. We successfully find proximity-induced superconductivity and supercurrents at T=0.6 K Some of these behaviors are very similar to those in single-walled carbon nanotubes, but we also find many drastic differences, such as the critical magnetic field anomalously 35-times larger than that of Nb electrodes. This implies strong spin coherence and entanglement in the MWNTs, resulting in realization of spin quantum bit and teleportation.
Keywords :
Josephson effect; aluminium; carbon nanotubes; coherence; diffusion; niobium; proximity effect (superconductivity); spin dynamics; superconducting critical field; superconductor-normal-superconductor devices; teleportation; type I superconductors; weak localisation; 0.6 K; Nb-C-Al; critical magnetic field; diffusive carrier transport regime; diffusive multiwalled carbon nanotubes; drastic differences; niobium diffusive MWNT aluminum junction; proximity induced superconductivity; spin quantum bit; strong spin coherence; supercurrents; teleportation; weak localization; Biomembranes; Carbon nanotubes; Electrodes; Electrons; Interference; Magnetic fields; Niobium; Samarium; Superconductivity; Temperature;
Conference_Titel :
Nanotechnology, 2003. IEEE-NANO 2003. 2003 Third IEEE Conference on
Print_ISBN :
0-7803-7976-4
DOI :
10.1109/NANO.2003.1230990
