IMM colloquium January 29: "Phonon hydrodynamics" (Lecture)
- Tuesday 29 January 2019Add to my calendar
- from 16:00
dr. Kamran Behnia (CRNS-Paris, France)
- Preceding lecture
Danny Lenstra (Synthetic Organic Chemistry): "Sustainable organophosphorus-catalysed Staudinger reduction"
Heat travels in insulators thanks to phonons, quantized collective oscillations of atoms. It is commonly described by Peierls-Boltzmann equation, which quantifies the spatial variation in phonon population caused by the temperature gradient. When most scattering events conserve momentum and do not decay heat flux, collective phonon a hydrodynamic regime of phonon flow appears. In this talk, I will review experiments, old and new, which have revealed the two signatures of this hydrodynamic flow, the Poiseuille flow of phonons and the second sound.
dr. Steffen Wiedmann