Absorption spectra of trilayer rhombohedral graphite
- Resource Type
- Authors
- Hong-Chang Lin; Jei Wang; Chi-Lang Lu; Chi-Chuan Hwang; Min-Fa Lin; Cheng-Peng Chang
- Source
- Applied Physics Letters. 89:221910
- Subject
- Condensed Matter::Materials Science
Physics and Astronomy (miscellaneous)
Absorption spectroscopy
Condensed matter physics
Band gap
Chemistry
Analytical chemistry
Stacking
Density of states
Orthorhombic crystal system
Graphite
Classification of discontinuities
Absorption (electromagnetic radiation)
- Language
- ISSN
- 1077-3118
0003-6951
Absorption spectra of trilayer rhombohedral graphite are studied with the tight-binding model. The interlayer interactions cause a tiny energy gap and band-edge states in electronic structures. The band-edge states exhibit logarithmic divergences and discontinuities in the density of states. The frequencies of the absorption peaks correspond to the vertical transition energies of the band-edge states. Optical spectra of trilayer simple hexagonal and orthorhombic graphites are also investigated. The stacking effects on the density of states and absorption spectra are presented and discussed in detail.