Analysis of Raman and Ellipsometric Responses of Nb$_{x}$W$_{1-x}$Se$_{2}$ alloys

TL;DR

This study investigates how optical properties of Nb$_{x}$W$_{1-x}$Se$_{2}$ alloys evolve with composition changes using Raman spectroscopy and ellipsometry, providing insights into alloy behavior.

Contribution

The paper presents experimental growth and optical analysis of Nb$_{x}$W$_{1-x}$Se$_{2}$ alloys, revealing how their optical responses vary with composition.

Findings

Optical properties change systematically with alloy composition

Raman and ellipsometry effectively characterize alloy variations

Provides data for tuning TMDC alloy optoelectronic properties

Abstract

The growth of transition metal dichalcogenide (TMDC) alloys provides an opportunity to experimentally access information elucidating how optical properties change with gradual substitutions in the lattice compared with their pure compositions. In this work, we performed growths of alloyed crystals with stoichiometric compositions between pure forms of NbSe2 and WSe2, followed by an optical analysis of those alloys by utilizing Raman spectroscopy and spectroscopic ellipsometry.