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Lattice symmetries, spectral topology and opto-electronic properties of graphene-like materials
- Source :
- EPL 119, 27001 (2017)
- Publication Year :
- 2017
-
Abstract
- The topology of the band structure, which is determined by the lattice symmetries, has a strong influence on the transport properties. Here we consider an anisotropic honeycomb lattice and study the effect of a continuously deformed band structure on the optical conductivity and on diffusion due to quantum fluctuations. In contrast to the behavior at an isotropic node we find super- and subdiffusion for the anisotropic node. The spectral saddle points create van Hove singularities in the optical conductivity, which could be used to characterize the spectral properties experimentally.<br />Comment: 9 pages, 6 figures. Slightly extended version, e.g. Eq.(12) included
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- EPL 119, 27001 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1701.02715
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1209/0295-5075/119/27001