UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 2:02
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Conference: Bucharest University Faculty of Physics 2024 Meeting


Section: Solid State Physics and Materials Science


Title:
Loss function in a three layer graphene structure at zero temperature


Authors:
Claudiu Caraiani(1), Lucian Ion(1,2)


*
Affiliation:
1)University of Bucharest, Faculty of Physics, Măgurele, PO Box MG11, 077125, Romania

2)Materials and Devices for Electronics and Optoelectronics Research Center, Măgurele, PO Box MG11, 077125, Romania


E-mail
claudiu.caraiani@gmail.com


Keywords:
Plasmons, Loss Function, Heterostructure, Graphene


Abstract:
We compute theoretically the loss function in a three layer graphene structure within random phase approximation (RPA) at zero temperature. In the long wave approximation we obtain analytical expressions for the loss function restricted to the acoustic and optical plasmon branches. We study both the homogenous as well as the inhomogenous case. Numerical simulations show that the plasmonic spectral weight of the loss function associated with undamped plasmonic branches is dominated by the acoustic plasmons. The loss function displays the usual broadened peaks for damped plasmons and we observe that these peaks start to merge as we increase the interlayer distance between the graphene layers.


References:

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