Heat Conduction Originates from both Particle-Like Diffusion of Phonon Wave-Packets (IMAGE)

National Centre of Competence in Research (NCCR) MARVEL

Heat Conduction Originates from both Particle-Like Diffusion of Phonon Wave-Packets

Caption

Heat conduction originates from both particle-like diffusion of phonon wave-packets (blurred spheres, following the realistic 3D phonon dispersion of CsPbBr3) and wave-like tunneling (blue waves). Tunneling emerges when the spacings between phonon branches (Lorentzian-shaped ridges, whose heights quantify the heat carried) become comparable to their line-widths (proportional to the widths of the ridges).

Credit

Michele Simoncelli, EPFL

Usage Restrictions

With credit

License

Licensed content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.