Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-06-10
Phys. Rev. B 84, 115136 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevB.84.115136
We address the problem of barrier tunneling in the two-dimensional T_3 lattice (dice lattice). In particular we focus on the low-energy, long-wavelength approximation for the Hamiltonian of the system, where the lattice can be described by a Dirac-like Hamiltonian associated with a pseudospin one. The enlarged pseudospin S = 1 (instead of S = 1/2 as for graphene) leads to an enhanced "super" Klein tunneling through rectangular electrostatic barriers. Our results are confirmed via numerical investigation of the tight-binding model of the lattice. For a uniform magnetic field, we discuss the Landau levels and we investigate the transparency of a rectangular magnetic barrier. We show that the latter can mainly be described by semiclassical orbits bending the particle trajectories, qualitatively similar as it is the case for graphene. This makes it possible to confine particles with magnetic barriers of sufficient width.
Bercioux Dario
Häusler Wolfgang
Urban Daniel F.
Wimmer Michael
No associations
LandOfFree
Barrier transmission of Dirac-like pseudospin-one particles 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 Barrier transmission of Dirac-like pseudospin-one particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Barrier transmission of Dirac-like pseudospin-one particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-413552