1.
Tunneling transport in topological insulator normal metal/insulator/d-wave superconductor junctions.
J Phys Condens Matter
; 24(32): 325702, 1-6, 2012 Aug 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22790091
RESUMO
We investigate the tunneling conductance in a normal metal/insulator/d-wave superconductor (NM/I/d-wave SC) junction with a barrier of thickness d and with an arbitrary gate voltage V(0) applied across the barrier region, formed on the surface of a topological insulator, using the Dirac-Bogoliubov-de Gennes equation and Blonder-Tinkham-Klapwijk (BTK) formalism. We find that the tunneling conductance as a function of both d and V(0) displays an oscillatory behavior whose amplitude decreases with increase of V(0). We also find that when the Andreev resonant condition is met, the tunneling conductance approaches a maximum value of 2G(0), independent of the gate voltage V(0).