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Liyan Zhu
다차원 탄소재료 연구단
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Giant thermal conductivity in diamane and the influence of horizontal reflection symmetry on phonon scattering

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Title
Giant thermal conductivity in diamane and the influence of horizontal reflection symmetry on phonon scattering
Author(s)
Liyan Zhu; Wu Li; Feng Ding
Publication Date
2019-03
Journal
NANOSCALE, v.11, no.10, pp.4248 - 4257
Publisher
ROYAL SOC CHEMISTRY
Abstract
Diamane, a chemically derived two-dimensional material, shows many superior physical and chemical properties similar to diamond thin films. Through the Peierls-Boltzmann transport equation, we reveal giant thermal conductivity in diamane with a stacking order of both AB and AA (respectively, abbreviated as D-AB and D-AA, hereafter) which are both comparable to that of diamond. Like in graphene, the phonon transport falls into the hydrodynamic regime even at room temperature, and the major contribution to the total thermal conductivity comes from the out-of-plane acoustic phonon modes (>40%). In addition, the thermal conductivity shows a dependence on the stacking order, namely, the thermal conductivity of D-AA, ∼2240 W m -1 K -1 at 300 K, is around 15% larger than that of D-AB, which is due to the strong restriction on the phonon scattering phase space induced by the horizontal reflection symmetry in D-AA. Such a kind of restriction, not limited to single atomic plane systems, is a general feature in two-dimensional materials with a horizontal reflection symmetry. © 2019 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/5668
ISSN
2040-3364
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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