A New Regime of Nanoscale Thermal Transport: Collective Diffusion Counteracts Dissipation Inefficiency
We uncover a new regime of nanoscale thermal transport that dominates when the separation between heat sources is small compared with the substrate’s dominant phonon mean free paths. Surprisingly, the interplay between neighboring heat sources can facilitate efficient, diffusive-like heat dissipation.
KeywordsHeat Source Heat Transport Heat Dissipation Thermal Transport Mean Free Path
The authors gratefully acknowledge support from the US Department of Energy BES AMOS, the SRC, the National Science Foundation and NSSEFF.
- 1.M. Siemens et al. “Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams,” Nature Mater. 9, 26-30 (2010).Google Scholar
- 2.A. Minnich et al. “Thermal conductivity spectroscopy technique to measure phonon mean free paths,” Phys. Rev. Lett. 107, 095901 (2011).Google Scholar
- 3.S. King et al. “The three M’s (materials, metrology, and modeling) together pave the path to future nanoelectronic technologies,” Appl. Phys. Lett. Mater. 1, 040701 (2013).Google Scholar
- 4.A. Rundquist et al. “Phase-matched generation of coherent soft X-rays,” Science 280, 1412 (1998).Google Scholar
- 5.D. Nardi et al. “Probing limits of acoustic nanometrology using coherent extreme ultraviolet light,” Proc. SPIE 8681, 86810N (2013).Google Scholar