Browse/search for people

Publication - Professor Martin Kuball

    Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration

    Citation

    Yuan, C, Li, J, Lindsay, L, Cherns, D, Pomeroy, JW, Liu, S, Edgar, JH & Kuball, M, 2019, ‘Modulating the thermal conductivity in hexagonal boron nitride via controlled boron isotope concentration’. Communications Physics, vol 2.

    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.

    Full details in the University publications repository