Quasibound states of quantum dots in single and bilayer graphene
- 14 March 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 77 (11), 115423
- https://doi.org/10.1103/physrevb.77.115423
Abstract
Dirac fermions interacting with a cylindrically symmetric quantum dot potential created in single and bilayer graphene are not confined but form quasibound states. The broadening of these quasibound states (i.e., the inverse of their lifetimes) decreases (increases) with the orbital momentum of the electron in the case of graphene (bilayer). Quasibound states with energy below (above) the barrier height are dominantly electronlike (holelike). A remarkable decrease of the energy level broadening is predicted for electron energies close to the barrier height, which are a consequence of the total internal reflection of the electronic wave at the dot edge.Keywords
This publication has 16 references indexed in Scilit:
- Graphene-based resonant-tunneling structuresApplied Physics Letters, 2007
- Tunable Quantum Dots in Bilayer GrapheneNano Letters, 2007
- Chiral tunnelling and the Klein paradox in grapheneNature Physics, 2006
- Unconventional quantum Hall effect and Berry’s phase of 2π in bilayer grapheneNature Physics, 2006
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005
- Experimental observation of the quantum Hall effect and Berry's phase in grapheneNature, 2005
- Unconventional Integer Quantum Hall Effect in GraphenePhysical Review Letters, 2005
- Electric Field Effect in Atomically Thin Carbon FilmsScience, 2004
- Hall conductivity of a two-dimensional graphite systemPhysical Review B, 2002
- Quantum dotsPublished by Elsevier BV ,1999