info:eu-repo/semantics/article
Relativistic effects in the energy loss of a fast charged particle moving parallel to a two-dimensional electron gas
Fecha
2018-05-01Registro en:
Mišković, Zoran L.; Akbari, Kamran; Segui Osorio, Silvina Inda Maria; Gervasoni, Juana Luisa; Arista, Néstor R.; Relativistic effects in the energy loss of a fast charged particle moving parallel to a two-dimensional electron gas; Elsevier Science; Beam Interactions with Materials and Atoms; 422; 1-5-2018; 18-23
0168-583X
CONICET Digital
CONICET
Autor
Mišković, Zoran L.
Akbari, Kamran
Segui Osorio, Silvina Inda Maria
Gervasoni, Juana Luisa
Arista, Néstor R.
Resumen
We present a fully relativistic formulation for the energy loss rate of a charged particle moving parallel to a sheet containing two-dimensional electron gas, allowing that its in-plane polarization may be described by different longitudinal and transverse conductivities. We apply our formulation to the case of a doped graphene layer in the terahertz range of frequencies, where excitation of the Dirac plasmon polariton (DPP) in graphene plays a major role. By using the Drude model with zero damping we evaluate the energy loss rate due to excitation of the DPP, and show that the retardation effects are important when the incident particle speed and its distance from graphene both increase. Interestingly, the retarded energy loss rate obtained in this manner may be both larger and smaller than its non-retarded counterpart for different combinations of the particle speed and distance.