Open AccessComprehensive optical characterization of atomically thin NbSe 2
Author(s) -
Heather M. Hill,
Albert F. Rigosi,
Sergiy Krylyuk,
Jifa Tian,
Nhan V. Nguyen,
Albert V. Davydov,
David B. Newell,
Angela R. Hight Walker
Publication year - 2018
Publication title -
physical review. b./physical review. b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.78
H-Index - 465
eISSN - 2469-9969
pISSN - 2469-9950
DOI - 10.1103/physrevb.98.165109
Subject(s) - materials science , physics
Transition-metal dichalcogenides (TMDCs) have offered experimental access to quantum confinement in one dimension. In recent years, metallic TMDCs like NbSe 2 have taken center stage with many of them exhibiting interesting temperature-dependent properties such as charge density waves and superconductivity. In this paper, we perform a comprehensive optical analysis of NbSe 2 by utilizing Raman spectroscopy, differential reflectance contrast, and spectroscopic ellipsometry. These analyses, when coupled with Kramers-Kronig analysis, allow us to extract the dielectric functions of bulk and atomically thin NbSe 2 and relate them to the resonant behavior of the Raman spectra.