X-ray edge problem of graphene
| Autor: | Yang, S. -R. Eric, Lee, Hyun C. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Physical Review B, Vol. 76, 245411 (2007). |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.76.245411 |
| Popis: | The X-ray edge problem of graphene with the Dirac fermion spectrum is studied. At half-filling the linear density of states suppresses the singular response of the Fermi liquid, while away from half-filling the singular features of the Fermi liquid reappear. The crossover behavior as a function of the Fermi energy is examined in detail. The exponent of the power-law absorption rate depends both on the intra- and inter-valley scattering, and it changes as a function of the Fermi energy, which may be tested experimentally. Comment: 7 pages, 1 figure |
| Databáze: | arXiv |
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