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Fast-Forward Adiabatic Dynamics of Massless Dirac Fermion in 1D Dirac-Weyl Semimetal
Deriyan Senjaya (a*), Bobby E.Gunara (a)

a) Theoretical Physics Laboratory
Department of Physics
Bandung Institute of Technology
Jalan Ganesha No.10, Bandung 40132, Indonesia
*deriyan191293[at]gmail.com


Abstract

Dirac-Weyl Semimetal (DWS) is a Dirac material with exotic properties that appear due to the presence of Massless Dirac Fermion (MDF). If the MDF is confined by certain potential, for example 1D coulomb potential, the exotic properties of DWS will increase. The enhancement also occurs simultaneously with a slow manipulation on coulomb potential, compared to MDF motion with parameter alpha_{t}. This enhancement particularly happens on its electrical transport properties because the MDF adiabatic dynamic is related to current. The enhancement gives an opportunity to DWS to be applied as FET, but the presence of adiabatic dynamic automatically generates slowly current enhancement. Therefore, we need to formulate auxiliary potential to accelerate the current enhancement. The auxiliary potential formulation was done by fast-forward method. The effect of these formulation was tested on graphene as DWS example with length L = (5 x 10-6; 2), then the current enhancement was examined with electrical conductance. Based on our result, manipulation of coulomb potential in 1 second increases the graphene conductance 1.153 and 1.057 times, respectively. The presence of conductance shift clearly indicates the current enhancement acceleration when an auxiliary potential is applied within the manipulation.

Keywords: Dirac-Weyl Semimetal; 1D Coulomb Potential; Adiabatic; Field Effect Transistor; Fast-Forward Method; Electrical Conductance

Topic: Condensed Matter Physics

Link: https://ifory.id/abstract/rXKwJ6DMb3cy

Conference: Asian Physics Symposium (APS 2019)

Plain Format | Corresponding Author (Deriyan Senjaya)

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