Doping effects on charge density instability in non-centrosymmetric PbxTaSe2

We report on the investigation of vibrational and electronic properties of the Pb doped dichalcogenide PbxTaSe2 using Raman scattering experiments. We observe a marked variation of the main vibrational modes with Pb concentration x. The concentration dependence of the vibrational modes resembles the...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2015-05
Main Authors: Sharafeev, Azat, Raman Sankar, Glamazda, Alexander, Kwang-Yong, Choi, Bohle, Robert, Lemmens, Peter, Chou, Fangcheng
Format: Article
Language:English
Subjects:
Charge density waves
Crystallography
Lead selenides
Raman spectra
Stability
Temperature dependence
Vibration analysis
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on the investigation of vibrational and electronic properties of the Pb doped dichalcogenide PbxTaSe2 using Raman scattering experiments. We observe a marked variation of the main vibrational modes with Pb concentration x. The concentration dependence of the vibrational modes resembles the dependence of the vibrational modes in TaSe2 on the number of crystallographic layers along the c axis direction [1]. The temperature and polarization dependence of Raman spectra of PbxTaSe2 revealed additional broad modes in the low frequency regime which are discussed in context of remnant charge density wave, induced disorder, or PbSe phase formed in the interface of Pb and TaSe2 layers.
ISSN:2331-8422
DOI:10.48550/arxiv.1505.00748