Thermal conductivity tuning by thermocrystals
Year: 2015
Type: preprint
Abstract: Phonons, quanta of lattice vibrations in condensed matter, are the main heat carriers in nonmetals promoting both particle and wave effects in transport properties, similar to that of photons. Numerous studies have so far reported large reductions of the thermal conductivity by enhancing incoherent scattering, which is essentially relevant to the particle picture. Here, we demonstrate thermal conductivity tuning using the wave nature of phonons to be stronger than 20% at 3.7 K by changing the short-range order within 10% of the period with randomly shifted holes in phononic crystal nanostructures. This investigation paves the way for the manipulation of the thermal phonon spectrum and for the development of correlated applications such as phonon rectification, cloaking and computing.
Source: arXiv (Cornell University)
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1823499814