Extreme ultraviolet transient gratings

F Bencivenga, F Capotondi, L Foglia… - … in Physics: X, 2023‏ - Taylor & Francis
The recent construction of free electron lasers allows extending laboratory-based laser
experiments to shorter wavelengths, accessing wavevectors typical of nanoscale dynamics …

Observation of second sound in graphite over 200 K

Z Ding, K Chen, B Song, J Shin, AA Maznev… - Nature …, 2022‏ - nature.com
Second sound refers to the phenomenon of heat propagation as temperature waves in the
phonon hydrodynamic transport regime. We directly observe second sound in graphite at …

GiftBTE: an efficient deterministic solver for non-gray phonon Boltzmann transport equation

Y Hu, R Jia, J Xu, Y Sheng, M Wen, J Lin… - Journal of Physics …, 2023‏ - iopscience.iop.org
Advances in nanotechnology have facilitated the exploration of submicron thermal transport.
At this scale, Fourier's law is no longer applicable, and the governing equation for thermal …

Analytical Green's function of the multidimensional Boltzmann transport equation for modeling hydrodynamic second sound

X Qian, C Zhang, TH Liu, R Yang - Physical Review B, 2025‏ - APS
Hydrodynamic second sound can be generated by heat pulses when the phonon-phonon
interaction is dominantly momentum conserving, and the propagation of the temperature …

Hydrodynamic thermal transport in silicon at temperatures ranging from 100 to 300 K

A Beardo, S Alajlouni, L Sendra, J Bafaluy, A Ziabari… - Physical Review B, 2022‏ - APS
The temperature profile around nano-and microscale heat sources on silicon substrate is
technologically important for many integrated circuit applications. Here we present full-field …

API phonons: Python interfaces for phonon transport modeling

X Qian, G Quan, TH Liu, R Yang - Materials Today Physics, 2025‏ - Elsevier
API Phonons is a Python software package to predict the transport dynamics of heat-carrying
phonons. Using the powerful syntax of Python, this package provides modules and functions …

Modeling of second sound in carbon nanostructures

AV Savin, YS Kivshar - Physical Review B, 2022‏ - APS
The study of thermal transport in low-dimensional materials has attracted a lot of attention
recently after discovery of high thermal conductivity of graphene. Here we study numerically …

Theoretical studies of transient hydrodynamic phonon transport in two-dimensional disk geometry

C Zhang, L Wu - Applied Physics Letters, 2025‏ - pubs.aip.org
Many phonon hydrodynamics phenomena, including heat vortices, wave and parabolic
distributions of heat flux, which appear due to sufficient normal process, can also appear …

Reflections on My Research in Heat and Energy

G Chen - ASME Journal of Heat and Mass Transfer, 2025‏ - asmedigitalcollection.asme.org
This article reflects on the author's research career, which has focused on heat and energy.
It details the challenges faced by the author and his research group, highlights their …