Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intrinsic Nanotwin Effect on Thermal Boundary Conductance in Bulk and
  Single-Nanowire Twinning Superlattices   Coherent twin boundaries form periodic lamellar twinning in a wide variety of
semiconductor nanowires, and are often viewed as near-perfect interfaces with
reduced phonon and electron scattering behaviors. Such unique characteristics
are of practical interest for high-performance thermoelectrics and
optoelectronics; however, insufficient understanding of twin-size effects on
thermal boundary resistance poses significant limitations for potential
applications. Here, using atomistic simulations and ab-initio calculations, we
report direct computational observations showing a crossover from diffuse
interface scattering to superlattice-like behavior for thermal transport across
nanoscale twin boundaries present in prototypical bulk and nanowire Si
examples. Intrinsic interface scattering is identified for twin periods larger
than or equal to 22.6 nm, but also vanishes below this size to be replaced by
ultrahigh Kapitza thermal conductances. Detailed analysis of vibrational modes
shows that modeling twin boundaries as atomically-thin 6H-Si layers, rather
than phonon scattering interfaces, provides an accurate description of
effective cross-plane and in-plane thermal conductivities in twinning
superlattices, as a function of the twin period thickness.

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The categories of this paper are: comp-gas
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg