研究目的
To investigate the interaction of fast charged particles with graphene layers, focusing on retardation effects in energy loss due to electronic excitations and transition radiation.
研究成果
Strong relativistic effects observed in low-energy loss channels at THz frequencies, with significant transition radiation at sub-THz frequencies; high-energy EELS shows weak retardation effects and negligible transition radiation. Results are sensitive to dissipative processes in graphene.
研究不足
Assumes graphene layers are in air and neglects recoil of the incident charged particle; theoretical model may not capture all experimental complexities.
1：Experimental Design and Method Selection:
A fully relativistic theoretical model based on Maxwell's equations, treating graphene layers as conductive sheets with 2D conductivity.
2：Sample Selection and Data Sources:
Single-layer and multi-layer graphene, with conductivity models (Drude model for THz frequencies, hydrodynamic model and ab initio calculations for higher energies).
3：List of Experimental Equipment and Materials:
Not applicable as it is a theoretical study; no physical equipment used.
4：Experimental Procedures and Operational Workflow:
Analytical modeling and solution of Maxwell's equations to compute energy losses and transition radiation.
5：Data Analysis Methods:
Decomposition of energy loss into ohmic and radiative components, comparison with experimental EELS data.
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