Abstract
Hexagonal boron nitride (h-BN) has been predicted to exhibit an in-plane thermal conductivity as high as ~ 550 W m−1 K−1 at room temperature, making it a promising thermal management material. However, current experimental results (220–420 W m−1 K−1)
have been well below the prediction. Here, we report on the modulation
of h-BN thermal conductivity by controlling the B isotope concentration.
For monoisotopic 10B h-BN, an in-plane thermal conductivity as high as 585 W m−1 K−1 is measured at room temperature, ~ 80% higher than that of h-BN with a disordered isotope concentration (52%:48% mixture of 10B and 11B).
The temperature-dependent thermal conductivities of monoisotopic h-BN
agree well with first principles calculations including only intrinsic
phonon-phonon scattering. Our results illustrate the potential to
achieve high thermal conductivity in h-BN and control its thermal
conductivity, opening avenues for the wide application of h-BN as
a next-generation thin-film material for thermal management,
metamaterials and metadevices.
Original language | English |
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Article number | 43 (2019) |
Number of pages | 8 |
Journal | Communications Physics |
Volume | 2 |
DOIs | |
Publication status | Published - 2 May 2019 |
Research Groups and Themes
- CDTR
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Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration
Yuan, C. (Creator), Pomeroy, J. (Creator) & Kuball, M. (Data Manager), University of Bristol, 11 Mar 2019
DOI: 10.5523/bris.16v9rfpzb3pl221yzel7x5u5ce, http://data.bris.ac.uk/data/dataset/16v9rfpzb3pl221yzel7x5u5ce
Dataset
Profiles
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Professor Martin H H Kuball
- School of Physics - Professor of Physics (Royal Society Wolfson Research Merit Award Holder)
Person: Academic