Wave-packet dynamics in a graphene with periodic potentials

A. Chaves; G.R. Berdiyorov; H.T. Yusupov; Kh.Yu. Rakhimov; M.M. Suleimanov; M.U. Nosirov

Wave-packet dynamics in a graphene with periodic potentials

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arxiv 2411.02896 v2 pith:ATFVQABJ submitted 2024-11-05 cond-mat.mes-hall

Wave-packet dynamics in a graphene with periodic potentials

M.M. Suleimanov , M.U. Nosirov , H.T. Yusupov , A. Chaves , G.R. Berdiyorov , Kh.Yu. Rakhimov This is my paper

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keywords wavegraphenepacketspropagationbarrierscalculateddynamicsheight

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We use the Dirac continuum model to study the propagation of electronic wave packets in graphene with periodically arranged circular potential steps. The time propagation of the wave packets are calculated using the split-operator method for different size, height and separation of the barriers. The time propagation of the wave packets is calculated using the split-operator method for various barrier sizes, heights, and separations. We found that, despite the pronounced Klein tunneling effect in graphene, the presence of a lattice of defects significantly impacts the propagation properties of the wave packets. For example, depending on the height and size of the incident wave packet, the transmission probability can decrease by more than 20\%. The alteration of the polarity of the potential barriers also contributes to the transmission probabilities of the wave packet in graphene. The obtained results could provide valuable insights into the fundamental understanding of charge carrier dynamics in graphene-based nanodevices.

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