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arXiv · 2108.04341

First-principles based simulations of electronic transmission in ReS$_{2}$/WSe$_{2}$ and ReS$_{2}$/MoSe$_{2}$ type-II vdW heterointerfaces

Dipankar Saha·Saurabh Lodha
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Abstract

Electronic transmission in monolayer ReS$_{2}$ and ReS$_{2}$ based van der Waals (vdW) heterointerfaces are studied here. Since ReS$_{2}$/WSe$_{2}$ and ReS$_{2}$/MoSe$_{2}$ type-II vdW heterostructures are suitable for near infrared (NIR)/short-wave infrared (SWIR) photodetection, the role of interlayer coupling at the heterointerfaces is examined in this work. Besides, a detailed theoretical study is presented employing density functional theory (DFT) and nonequilibrium Green's function (NEGF) combination to analyse the transmission spectra of the two-port devices with ReS$_{2}$/WSe$_{2}$ and ReS$_{2}$/MoSe$_{2}$ channels and compare the near-equilibrium conductance values.Single layer distorted1T ReS$_{2}$ exhibits formation of parallel chains of 'Re' - 'Re' bonds, leading to in-plane anisotropy. Owing to this structural anisotropy, the charge carrier transport is very much orientation dependent in ReS$_{2}$. Therefore, this work is further extended to investigate the role of clusterized 'Re' atoms in electronic transmission.

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Dipankar Saha, Saurabh Lodha. 2021-08-09. First-principles based simulations of electronic transmission in ReS$_{2}$/WSe$_{2}$ and ReS$_{2}$/MoSe$_{2}$ type-II vdW heterointerfaces. https://arxiv.org/abs/2108.04341

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