Pressure evolution of the optical phonons of MoTe2

Stellino, E. (2020) Pressure evolution of the optical phonons of MoTe2. Il nuovo cimento C, 43 (4-5). pp. 1-8. ISSN 1826-9885

Text ncc12115.pdf - Published Version Download (543kB)

Abstract

In this work, we report a study on the evolution of the MoTe2 phonons under pressure, performed through optical spectroscopy on bulk samples. Raman and infrared measurements were carried out at room temperature (RT) up to ∼20 GPa. The analysis of the phonon frequencies as a function of pressure confirms the absence of structural transition, already observed in the literature. The abrupt broadening of the Raman peaks above 18 GPa suggests an increase of the charge carriers, also supported by the rapid decrease of the infrared peak area in the range 13–19 GPa. The asymmetric line-shape of the infrared peak at low pressure has been interpreted in the framework of the Fano theory, in analogy to the results obtained for graphene, and related to the presence of doping levels in the band structure.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	18 Mar 2021 09:04
Last Modified:	18 Mar 2021 09:04
URI:	http://eprints.bice.rm.cnr.it/id/eprint/20850

Actions (login required)

View Item