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IMM colloquium January 29: "Phonon hydrodynamics" (Lecture)

Date
Tuesday 29 January 2019Add to my calendar
Time
from 16:00
Location
HG00.307
Speaker
dr. Kamran Behnia (CRNS-Paris, France)
Preceding lecture
Danny Lenstra (Synthetic Organic Chemistry): "Sustainable organophosphorus-catalysed Staudinger reduction"
Description

dr. Kamran BehniaHeat 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.

Contact
dr. Steffen Wiedmann