Bilayer Graphene Interferometry : Phase Jump and Wave Collimation

Details Bilayer Graphene Interferometry : Phase Jump and Wave Collimation Bilayer Graphene Interferometry : Phase Jump and Wave Collimation

2009-11-04

arxiv.org/abs/0911.0765v1

Phys. Rev. Lett. 103, 196802 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 6 figures

Scientific paper

We theoretically study the phase of the reflection amplitude of an electron (massive Dirac fermion) at a lateral potential step in Bernal-stacked bilayer graphene. The phase shows anomalous jump of $\pi$, as the electron incidence angle (relative to the normal direction to the step) varies to pass $\pm \pi/4$. The jump is attributed to the Berry phase associated with the pseudospin-1/2 of the electron. This Berry-phase effect is robust against the band gap opening due to the external electric gates generating the step. We propose an interferometry setup in which collimated waves can be generated and tuned. By using the setup, one can identify both the $\pi$ jump and the collimation angle.

Affiliated with

Also associated with

No associations

Rating

Bilayer Graphene Interferometry : Phase Jump and Wave Collimation 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 Bilayer Graphene Interferometry : Phase Jump and Wave Collimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bilayer Graphene Interferometry : Phase Jump and Wave Collimation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-619698