X-ray edge problem of graphene

Details X-ray edge problem of graphene X-ray edge problem of graphene

2007-08-10

arxiv.org/abs/0708.1366v2

Physical Review B, Vol. 76, 245411 (2007).

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 1 figure

Scientific paper

10.1103/PhysRevB.76.245411

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.

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