Open AccessSuperconductivity in textured Bi clusters/Bi2Te3 films
Author(s) -
Phuoc Huu Le,
WenYen Tzeng,
Hsueh Ju Chen,
Chih-Wei Luo,
JiunnYuan Lin,
Jihperng Leu
Publication year - 2014
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.4894779
Subject(s) - bismuth , auger electron spectroscopy , superconductivity , materials science , topological insulator , thin film , spectroscopy , cluster (spacecraft) , pulsed laser deposition , condensed matter physics , nanotechnology , metallurgy , quantum mechanics , computer science , nuclear physics , programming language , physics
We report superconductivity at an onset critical temperature below 3.1 K in topological insulator ∼200-nm-thick Bi2Te3 thin films grown by pulsed laser deposition. Using energy-dispersive X-ray spectroscopy elemental mapping and Auger electron spectroscopy elemental depth profiling, we clearly identified bismuth (Bi) precipitation and Bi cluster signatures. Superconductivity in the Bi2Te3 films was attributed to the proximity effect of Bi clusters precipitated on the surface of the Bi2Te3 films