Abstract
The thermal transport properties of hexagonal boron nitride nanoribbons (BNNRs) areinvestigated. By calculating the phonon spectrum and thermal conductance, it is foundthat the BNNRs possess excellent thermal transport properties. The thermal conductanceof BNNRs can be comparable to that of graphene nanoribbons (GNRs) and even exceedthe latter below room temperature. A fitting formula is obtained to describe thefeatures of thermal conductance in BNNRs, which reveals a critical role of theT1.5 dependence in determining the thermal transport. In addition, an obviously anisotropicthermal transport phenomenon is observed in the nanoribbons. The thermal conductivityof zigzag-edged BNNRs is shown to be about 20% larger than that of armchair-edgednanoribbons at room temperature. The findings indicate that the BNNRs can be applied asimportant components of excellent thermal devices.
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