1.
Science
; 286(5438): 263-265, 1999 Oct 08.
Article
in English
| MEDLINE
| ID: mdl-10514364
ABSTRACT
The superconducting proximity effect in single-walled carbon nanotubes connected to niobium electrodes was controlled with the use of nearby gates that tune the niobium-nanotube transparency. At 4.2 kelvin, when the transparency was tuned to be high, a dip in the low-bias differential resistance was observed, indicating a proximity effect mediated by Andreev reflection. When the transparency was tuned to be low, signatures of Andreev reflection disappeared and only tunneling conduction was observed. Below approximately 4 kelvin, a narrow peak in differential resistance around zero bias appeared superimposed on the Andreev dip, probably as a result of electron-electron interaction competing with the proximity effect.
2.
3.
Phys Rev B Condens Matter
; 50(2): 1325-1328, 1994 Jul 01.
Article
in English
| MEDLINE
| ID: mdl-9975815