Lateral and flexural phonon thermal transport in graphene and stanene bilayers

Yang Hong, Chongqin Zhu, Minggang Ju, Jingchao Zhang, Xiao C Zeng

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Stanene, a low thermal conductivity two-dimensional (2D) sheet composed of group-IV element Sn, is a prototype material with novel properties such as 2D topological insulating behavior and near-room-temperature quantum Hall effects. Monolayer graphene, on the other hand, possesses unusual thermal properties, but has a zero bandgap. By stacking stanene and graphene monolayers vertically into a hetero-bilayer, an indirect bandgap can be obtained, making the hetero-bilayer a good candidate for special applications. In this work, the in-plane thermal conductivity (κ) and out-of-plane interfacial thermal resistance (R) in the hetero-bilayer are systematically investigated using non-equilibrium molecular dynamics and transient pump-probe methods. Effects of dimension, system temperature and van der Waals coupling strength on the thermal properties are examined. The predicted in-plane thermal conductivity of the graphene/stanene hetero-bilayer is 311.1 W m-1 K-1, higher than most 2D materials such as phosphorene, hexagonal boron nitride (h-BN), MoS2 and MoSe2. Phonon power spectra are recorded for graphene and stanene individually to help the explanation of their κ difference. The inter-layer thermal resistance between graphene and stanene hetero-bilayers is predicted to be 2.13 × 10-7 K m2 W-1, which is on the same order of magnitude as several other 2D bilayer structures.

Original languageEnglish (US)
Pages (from-to)6554-6562
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number9
DOIs
StatePublished - 2017

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Graphite
graphene
Thermal conductivity
thermal conductivity
thermal resistance
Heat resistance
Monolayers
Energy gap
Thermodynamic properties
thermodynamic properties
Quantum Hall effect
quantum Hall effect
boron nitrides
Power spectrum
Molecular dynamics
power spectra
prototypes
Hot Temperature
Pumps
pumps

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Lateral and flexural phonon thermal transport in graphene and stanene bilayers. / Hong, Yang; Zhu, Chongqin; Ju, Minggang; Zhang, Jingchao; Zeng, Xiao C.

In: Physical Chemistry Chemical Physics, Vol. 19, No. 9, 2017, p. 6554-6562.

Research output: Contribution to journalArticle

Hong, Yang ; Zhu, Chongqin ; Ju, Minggang ; Zhang, Jingchao ; Zeng, Xiao C. / Lateral and flexural phonon thermal transport in graphene and stanene bilayers. In: Physical Chemistry Chemical Physics. 2017 ; Vol. 19, No. 9. pp. 6554-6562.
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