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Monte Carlo studies of low‐field electron transport in monolayer silicene and graphene
Author(s) -
Borowik Piotr,
Thobel JeanLuc,
Adamowicz Leszek
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600380
Subject(s) - silicene , condensed matter physics , graphene , electron mobility , scattering , electron , materials science , electron scattering , monte carlo method , monolayer , phonon , degenerate energy levels , diffusion , physics , nanotechnology , optics , quantum mechanics , statistics , mathematics
Electron mobility and diffusion coefficients in monolayer silicene and graphene are calculated by Monte Carlo simulations using a simplified band structure with linear energy bands. Temperature evolution of the low‐field mobility and diffusion coefficients is presented. Calculated characteristics of the low‐field mobility in silicene exhibit a 1/ T 3 dependence for nondegenerate electron gas conditions, which is attributed to dominant acoustic phonon scattering and to the linear band structure of the material. In degenerate conditions, a 1/ T dependence is found in silicene. In graphene, there is no such simple power relation since optical and acoustic phonon scattering have comparable influences on electron transport. It is also found that electron–electron scattering only slightly modifies the low‐field electron mobility in a degenerate electron gas.