Electronic and optical properties of two-dimensional heterostructure and homobilayer with various interlayer twist angle

Abstract

Discovery of two-dimensional (2D) material have brought multiple ways to modify electronic structure and optical properties of materials and devices at atomistic level. There is verity of 2D materials available in research community. Among those 2D-Transition-metal dichalcogenides (TMDC) materials hold some very important and interesting properties. Therefore, in our thesis work we are mainly focussed on TMDC materials. At present, world is suffering from pollution where non-renewable energy sources are major cause. To overcome this issue, we should move to renewable energy sources such as hydrogen energy, solar energy etc. Here the 2D materials plays important role as they are much more efficient material than any other material. The Home/hetero structures and based on 2D materials also playing a very important role in various applications such as Photocatalyst, photodetectors, sensors wearable electronics etc. The properties of 2D home/hetero structures varied by different factors such as mechanical strain, external electric field and twist angles. Therefore, in the work, we used twist angle as a external factors to modulate the properties of MoSe2/MoSe2 homo bilayers and GaTe/MoS2 based heterostructures. One of our main focus throughout the this work is to find such selective angles so that properties are modified as per application requirement.