Observation of A1g mode at the edges of MoS2 and its applications

Siddhartha Dam; Abhishek Thakur; Shamima Hussain; N. V. Chandra Shekar; G. Amarendra

doi:10.1140/epjp/s13360-021-01571-0

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2023 Impact factor 2.8

EPJ PLUS - Condensed Matter and Complex Systems

Eur. Phys. J. Plus (2021) 136: 589
https://doi.org/10.1140/epjp/s13360-021-01571-0

Regular Article

Observation of A_1g mode at the edges of MoS₂ and its applications

Siddhartha Dam¹, Abhishek Thakur¹, Shamima Hussain¹^c, N. V. Chandra Shekar¹^,2 and G. Amarendra²

¹ UGC-DAE CSR, Kalpakkam Node, (Affiliated to University of Madras), 603104, Kokilamedu, Tamil Nadu, India
² Materials Science Group, IGCAR, HBNI, 603102, Kalpakkam, Tamil Nadu, India

^c sh@csr.res.in, shamimah1@gmail.com

Received: 4 December 2020
Accepted: 17 May 2021
Published online: 28 May 2021

Abstract

Anisotropic behaviour of the A_1g vibrational mode of MoS₂ at the edges has been reported. Polarized Raman spectroscopy is used to identify edges, and decipher angles between them have been discussed. The aberrant appearance of the A_1g mode at the edges has been attributed to breaking of back-scattering geometry. The direction-dependent intensity of the A_1g mode is used to characterize the angle between edges, thus finding the chirality of the edges.

Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjp/s13360-021-01571-0.

© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021