Cietvielu fizikas institūts / Institute of Solid State Physics

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LU aģentūra-zinātniskais institūts / Agency of the University of Latvia

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Computer Simulation of the Electric Transport Properties of the FeSe Monolayer
(Walter de Gruyter, 2020) Sergeyev, D.; Zhanturina, N.; Myasnikova, L.; Popov, Anatoli I.; Duisenova, A.; Istlyaup, A.
The paper deals with the model research of electric transport characteristics of stressed and non-stressed FeSe monolayers. Transmission spectra, current-voltage characteristic (CVC) and differential conductivity spectra of two-dimensional FeSe nanostructure have been calculated within the framework of the density functional theory and non-equilibrium Green's functions (DFT + NEGF). It has been shown that the electrophysical properties depend on the geometry of the sample, the substrate, and the lattice constant. On CVC of non-stressed sample in the range from -1.2 V to -1 and from 1.2 V to 1.4 V, a region of negative differential resistance (NDR) has been observed. NDR is at both signs of the applied voltage due to the symmetry of the nanostructure. d2I/dV2 is used to determine the nature of the electron-phonon interaction and the features of quasiparticle tunnelling in stressed and non-stressed samples. The results obtained can be useful for calculating new elements of 2D nanoelectronics. © 2020 D. Sergeyev et al., published by Sciendo 2020. --//-- Published under the CC BY 4.0 license.