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Manifestation of the Hofstadter butterfly in far-infrared absorption | | Vidar Gudmundsson
; Rolf R. Gerhardts
; | | Date: |
3 Jul 1996 | | Journal: | Phys. Rev. B 54, R5223-R5226 (1996) DOI: 10.1103/PhysRevB.54.R5223 | | Subject: | cond-mat | | Affiliation: | University of Iceland) and Rolf R. Gerhardts (Max-Planck Institute, Stuttgart | | Abstract: | The far-infrared absorption of a two-dimensional electron gas with a square-lattice modulation in a perpendicular constant magnetic field is calculated self-consistently within the Hartree approximation. For strong modulation and short period we obtain intra- and intersubband magnetoplasmon modes reflecting the subbands of the Hofstadter butterfly in two or more Landau bands. The character of the absorption and the correlation of the peaks to the number of flux quanta through each unit cell of the periodic potential depends strongly on the location of the chemical potential with respect to the subbands, or what is the same, on the density of electrons in the system. | | Source: | arXiv, cond-mat/9607015 | | Other source: | [GID 740854] pmid9986574 | | Services: | Forum | Review | PDF | Favorites | |
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