| Full text | |
| Author(s): |
de Castro, S.
;
Peres, M. L.
;
Chitta, V. A.
;
Gratens, X.
;
Soares, D. A. W.
;
Fornari, C. I.
;
Rappl, P. H. O.
;
Abramof, E.
;
Oliveira, Jr., N. F.
Total Authors: 9
|
| Document type: | Journal article |
| Source: | MATERIALS RESEARCH EXPRESS; v. 3, n. 7 JUL 2016. |
| Web of Science Citations: | 1 |
| Abstract | |
We performed magnetoresistance measurements on Bi2Te3 thin film in the temperature range of T = 1.2-4.0 Kand for magnetic fields up to 2 T. The curves exhibited anomalous behavior for temperatures below 4.0 K. Different temperature intervals revealed electrical transport through different conductive channels with clear signatures of weak antilocalization. The magnetoresistance curves were explained using the Hikami-Larkin-Nagaoka model and the 2D Dirac modified model. The comparison between the parameters obtained from the two models revealed the transport via topological surface states and bulk states. In addition, a superconductive like transition is observed for the lowest temperatures and we suggest that this effect can be originated from the misfit dislocations caused by strain, giving rise to a superconductive channel between the interface of the film and the substrate. (AU) | |
| FAPESP's process: | 07/50968-0 - Research into new materials involving intense magnetic fields and low temperatures |
| Grantee: | Nei Fernandes de Oliveira Junior |
| Support Opportunities: | Research Projects - Thematic Grants |