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Dirac electrons in a Kronig-Penney potential: dispersion relation and transmission periodic in the strength of the barriers
- Source :
- Phys. Rev. B 80, 205415 (2009)
- Publication Year :
- 2009
-
Abstract
- The transmission T and conductance G through one or multiple one-dimensional, delta-function barriers of two-dimensional fermions with a linear energy spectrum are studied. T and G are periodic functions of the strength P of the delta-function barrier V(x,y) / hbar v_F = P delta(x). The dispersion relation of a Kronig-Penney (KP) model of a superlattice is also a periodic function of P and causes collimation of an incident electron beam for P = 2 pi n and n integer. For a KP superlattice with alternating sign of the height of the barriers the Dirac point becomes a Dirac line for P = (n + 1/2) pi.<br />Comment: 5 pages, 6 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 80, 205415 (2009)
- Publication Type :
- Report
- Accession number :
- edsarx.0911.4017
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.80.205415