Bound states and persistent currents in topological insulator rings

Details Bound states and persistent currents in topological insulator rings Bound states and persistent currents in topological insulator rings

2010-11-23

arxiv.org/abs/1011.5166v2

Phys. Rev. B 83, 125420 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 10 figures. (minor changes, typos corrected)

Scientific paper

10.1103/PhysRevB.83.125420

We analyze theoretically the bound state spectrum of an Aharonov Bohm (AB) ring in a two-dimensional topological insulator using the four-band model of HgTe-quantum wells as a concrete example. We calculate analytically the circular helical edge states and their spectrum as well as the bound states evolving out of the bulk spectrum as a function of the applied magnetic flux and dimension of the ring. We also analyze the spin-dependent persistent currents, which can be used to measure the spin of single electrons. We further take into account the Rashba spin-orbit interaction which mixes the spin states and derive its effect on the ring spectrum. The flux tunability of the ring states allows for coherent mixing of the edge- and the spin degrees of freedom of bound electrons which could be exploited for quantum information processing in topological insulator rings.

Affiliated with

Also associated with

No associations

Rating

Bound states and persistent currents in topological insulator rings 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 Bound states and persistent currents in topological insulator rings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bound states and persistent currents in topological insulator rings will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-589069