Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-01-12
Nature Communications 2:575 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
28 pages, 5 figures
Scientific paper
10.1038/ncomms1586
Three-dimensional topological insulators are characterized by the presence of a bandgap in their bulk and gapless Dirac fermions at their surfaces. New physical phenomena originating from the presence of the Dirac fermions are predicted to occur, and to be experimentally accessible via transport measurements in suitably designed electronic devices. Here we study transport through superconducting junctions fabricated on thin Bi2Se3 single crystals, equipped with a gate electrode. In the presence of perpendicular magnetic field B, sweeping the gate voltage enables us to observe the filling of the Dirac fermion Landau levels, whose character evolves continuously from electron- to hole-like. When B=0, a supercurrent appears, whose magnitude can be gate tuned, and is minimum at the charge neutrality point determined from the Landau level filling. Our results demonstrate how gated nano-electronic devices give control over normal and superconducting transport of Dirac fermions at an individual surface of a three-dimensional topological insulator.
Couto Nuno J. G.
Giannini Enrico
Li Jiying
Morpurgo Alberto F.
Oostinga Jeroen B.
No associations
LandOfFree
Gate-tuned normal and superconducting transport at the surface of a topological insulator does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gate-tuned normal and superconducting transport at the surface of a topological insulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gate-tuned normal and superconducting transport at the surface of a topological insulator will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-265073