Tunneling between helical edge states through extended contacts

Details Tunneling between helical edge states through extended contacts Tunneling between helical edge states through extended contacts

2012-03-20

arxiv.org/abs/1203.4486v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

We consider a quantum spin Hall system in a two-terminal setup, with an extended tunneling contact connecting upper and lower edges. We analyze the effects of this geometry on the backscattering current as a function of voltage, temperature, and strength of the electron interactions. We find that this configuration may be useful to confirm the helical nature of the edge states and to extract their propagation velocity. By comparing with the usual quantum point contact geometry, we observe that the power-law behaviors predicted for the backscattering current and the linear conductance are recovered for low enough energies, while different power-laws also emerge at higher energies.

Affiliated with

Also associated with

No associations

Rating

Tunneling between helical edge states through extended contacts 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 Tunneling between helical edge states through extended contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunneling between helical edge states through extended contacts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-495625