The description of phonon heat conduction has typically been based on Fourier diffusion
theory. However, over the past three decades, a host of interesting phonon transport …

Phonon hydrodynamics is an exotic phonon transport phenomenon that challenges the
conventional understanding of diffusive phonon scattering in crystalline solids. It features a …

We combine hydrodynamic and field theoretic methods to develop a general theory of
phonons as Goldstone bosons in crystals, glasses, and liquids based on nonaffine …

ABSTRACT A thorough understanding of the microscopic picture of heat conduction in
solids is critical to a broad range of applications, from thermal management of …

In solids, hydrodynamics have been observed in both amorphous and crystalline materials
under a wide range of conditions. However, its fundamental physics is still unclear. Recent …

We developed the theory of hydrodynamics of an isotropic Fermi liquid of electrons coupled
to isotropic acoustic phonons, assuming that umklapp processes may be neglected. At low …

Hotspot is a ubiquitous phenomenon in micro/nanoscale chips. Here, it is found that the
thermal conductivity is not a constant in such a homogeneous system. The hotspots in …

Phonon hydrodynamics, a collective motion of phonons, has recently attracted renewed
attention since its temperature window has been greatly extended in layered materials. The …

Microscale energy transport processes are crucial in microelectronics, energy-harvesting
devices, and emerging quantum materials. To study these processes, methods that can …

In this work, we study thermal phonon vortex in graphene ribbon by a discrete-ordinate
solution of phonon Boltzmann equation under Callaway's dual relaxation model. The …