Anisotropic thermal transport in twisted bilayer graphene. Issue 36 (9th September 2022)

• Record Type: Journal Article
• Authors: Liu, Wenxiang; Hong, Yang; Zhang, Jingchao; Yue, Yanan
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 36(2022)
• Page Start: 21722
• Page End: 21728
• Publication Date: 2022-09-09
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp01896a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Interlayer twisting provides a practical approach to manipulate the anisotropic thermal conductivity of bilayer graphene. Abstract : Recently, twisted bilayer graphene (TBLG) has attracted enormous attention owing to its peculiar electronic properties. In this work, the anisotropic thermal conductivity of TBLG is comprehensively investigated. It is reported that interlayer twisting can be a practical approach for thermal transport regulation with high accuracy. A strong non-monotonic correlation between anisotropic thermal conductivity and twisting angles is revealed. Extensive phonon behavior analyses reveal the physical mechanism. The anisotropic thermal transport in TBLG is explained by the calculated phonon density of states (PDOS). Meanwhile, the phonon spectra and phonon relaxation times extracted from spectral energy density (SED) profiles explain the decreasing trend of thermal conductivity with increasing twisting angles. The increase in thermal conductivity is attributed to the combined effects of twist and anisotropy. The reported anisotropic thermal conductivity is important to the thermal modulation and our analyses provide a valuable complement to the phonon studies of TBLG.