Jump to main content
Jump to site search


Coherent control of thermal phonon transport in van der Waals superlattices

Author affiliations

Abstract

van der Waals (vdW) heterostructures are a central focus of materials science and condensed matter physics due to the novel physical phenomena and properties obtained by precisely stacking heterogeneous atomically thin layers. vdW heterostructures are expected to allow for the coherent manipulation of THz lattice vibrations and hence heat conduction due to the ability to precisely control chemical composition at the atomic scale, but little work has focused on thermal transport in these materials. Here, we report an ab initio study of thermal transport in vdW superlattices consisting of alternating transition metal dichalcogenide atomic layers. Our calculations show that the lattice vibrational spectrum and scattering rates can be precisely manipulated by the choice of each atomically thin layer, resulting in materials with novel properties such as large thermal anisotropies approaching 200 and ultralow cross-plane thermal conductivities comparable to those of amorphous materials. Our work demonstrates how coherent manipulation of phonons in vdW superlattices can expand the property space beyond that occupied by natural materials and suggests an experimental route to realize these properties.

Graphical abstract: Coherent control of thermal phonon transport in van der Waals superlattices

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Mar 2018, accepted on 07 May 2018 and first published on 21 May 2018


Article type: Paper
DOI: 10.1039/C8NR02150C
Citation: Nanoscale, 2018, Advance Article
  •   Request permissions

    Coherent control of thermal phonon transport in van der Waals superlattices

    R. Guo, Y. Jho and A. J. Minnich, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR02150C

Search articles by author

Spotlight

Advertisements