Issue 2, 2023

Surface acoustic wave induced phenomena in two-dimensional materials

Abstract

Surface acoustic wave (SAW)–matter interaction provides a fascinating key for inducing and manipulating novel phenomena and functionalities in two-dimensional (2D) materials. The dynamic strain field and piezo-electric field associated with propagating SAWs determine the coherent manipulation and transduction between 2D excitons and phonons. Over the past decade, many intriguing acoustic-induced effects, including the acousto-electric effect, acousto-galvanic effect, acoustic Stark effect, acoustic Hall effect and acoustic exciton transport, have been reported experimentally. However, many more phenomena, such as the valley acousto-electric effect, valley acousto-electric Hall effect and acoustic spin Hall effect, were only theoretically proposed, the experimental verification of which are yet to be achieved. In this minireview, we attempt to overview the recent breakthrough of SAW-induced phenomena covering acoustic charge transport, acoustic exciton transport and modulation, and coherent acoustic phonons. Perspectives on the opportunities of the proposed SAW-induced phenomena, as well as open experimental challenges, are also discussed, attempting to offer some guidelines for experimentalists and theorists to explore the desired exotic properties and boost practical applications of 2D materials.

Graphical abstract: Surface acoustic wave induced phenomena in two-dimensional materials

Article information

Article type
Minireview
Submitted
30 sep 2022
Accepted
09 nov 2022
First published
12 nov 2022

Nanoscale Horiz., 2023,8, 158-175

Surface acoustic wave induced phenomena in two-dimensional materials

X. Nie, X. Wu, Y. Wang, S. Ban, Z. Lei, J. Yi, Y. Liu and Y. Liu, Nanoscale Horiz., 2023, 8, 158 DOI: 10.1039/D2NH00458E

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