Strain-tunable lattice thermal conductivity of the Janus PtSTe monolayer
- 27 October 2021
- journal article
- research article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 34 (1), 015303
- https://doi.org/10.1088/1361-648x/ac2a7a
Abstract
Using first-principles calculations and Boltzmann transport theory, we study the effect of biaxial tensile strain on phonon transport in a Janus PtSTe monolayer. The band gap between the optical and acoustic phonon branches shrinks with increasing strain, resulting in a highly nonlinear monotonic decrease in the lattice thermal conductivity. That reduction reaches close to an order of magnitude when the gap disappears completely under high strains (>8%). This behavior is attributed to a strong enhancement of the anharmonic scattering of acoustic phonons due to the band overlap. Our findings underscore the potential of strain engineering as a class of methods to tune the thermal transport properties of two-dimensional (2D) Janus nanomaterials.Keywords
Funding Information
- National Natural Science Foundation of China (11964002)
This publication has 29 references indexed in Scilit:
- First principles phonon calculations in materials scienceScripta Materialia, 2015
- Thermal conductivity of biaxial-strained MoS2: sensitive strain dependence and size-dependent reduction rateNanotechnology, 2015
- The integrated spintronic functionalities of an individual high-spin state spin-crossover molecule between graphene nanoribbon electrodesNanotechnology, 2015
- Structural stability of single-layer MoS2 under large strainJournal of Physics: Condensed Matter, 2015
- Origins of thermal conductivity changes in strained crystalsPhysical Review B, 2014
- ShengBTE: A solver of the Boltzmann transport equation for phononsComputer Physics Communications, 2014
- Effect of strain on the thermal conductivity of solidsThe Journal of Chemical Physics, 2006
- Generalized Gradient Approximation Made SimplePhysical Review Letters, 1996
- Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis setPhysical Review B, 1996
- Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis setComputational Materials Science, 1996