Phonons in MoSe2/WSe2 van der Waals heterobilayer

Autor:	Mahrouche, F., Rezouali, K., Zaabar, F., Molina-Sánchez, A.
Rok vydání:	2021
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1002/pssb.202100321
Popis:	We report first-principles calculations of the structural and vibrational properties of the synthesized two-dimensional van der Waals heterostructures formed by single-layers dichalcogenides MoSe2 and WSe2. We show that, when combining these systems in a periodic two-dimensional heterostructures, the intrinsic phonon characteristics of the free-standing constituents are to a large extent preserved but, furthermore, exhibit shear and breathing phonon modes that are not present in the individual building blocks. These peculiar modes depend strongly on the weak vdW forces and has a great contibution to the thermal properties of the layered materials. Besides these features, the departure of flexural modes of heterobilayer from the ones of its monolayer parents are also found. Comment: 7 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2105.11370 Zobrazit plný text záznamu View this record from Arxiv