116 citations · 504 across the 16 of their papers we have counts for
16 papers
Intrinsic Temporal Coherence Governs Heat Transport of Zone-Folded Phonons
Xiaoyu Huang, Yuxiang Ni, Zhongwei Zhang +4
While spatial phonon coherence manifested through band folding is believed to be a key factor governing the anomalous thermal conductivity of periodic structures, we investigate ph…
Atomistic modeling of extreme near-field heat transport across nanogaps between two polar dielectric materials
Yangyu Guo, Mauricio Gómez Viloria, Riccardo Messina +2
The understanding of extreme near-field heat transport across vacuum nanogaps between polar dielectric materials remains an open question. In this work, we present a molecular dyna…
Polaritonic Waveguide Emits Super-Planckian Thermal Radiation
Saeko Tachikawa, Jose Ordonez-Miranda, Laurent Jalabert +7
Classical Planck's theory of thermal radiation predicts an upper limit of the heat transfer between two bodies separated by a distance longer than the dominant radiation wavelength…
Role of Nottingham effect in the heat transfer in extreme near-field regime
Mauricio Gómez Viloria, Yangyu Guo, Samy Merabia +2
We analyze the heat transfer between two metals separated by a vacuum gap in the extreme near-field regime. In this cross-over regime between conduction and radiation, heat exchang…
Observation of phonon Poiseuille flow in isotopically-purified graphite ribbons
Xin Huang, Yangyu Guo, Yunhui Wu +7
In recent times, the unique collective transport physics of phonon hydrodynamics motivates theoreticians and experimentalists to explore it in micro- and nanoscale and at elevated…
Assessing Phonon Coherence Using Spectroscopy
Zhongwei Zhang, Yangyu Guo, Marc Bescond +3
As a fundamental physical quantity of thermal phonons, temporal coherence participates in a broad range of thermal and phononic processes, while a clear methodology for the measure…
Atomistic simulation of phonon heat transport across metallic nanogaps
Yangyu Guo, Christophe Adessi, Manuel Cobian +1
The understanding and modeling of the heat transport across nanometer and sub-nanometer gaps where the distinction between thermal radiation and conduction become blurred remains a…
Strong phase correlation between diffusons governs heat conduction in amorphous silicon
Zhongwei Zhang, Yangyu Guo, Marc Bescond +3
Understanding the thermal vibrations and thermal transport in amorphous materials is an important but long-standing issue in several theoretical and practical fields. Using direct…
Heat conduction theory including phonon coherence
Zhongwei Zhang, Yangyu Guo, Marc Bescond +3
Understanding and quantifying the fundamental physical property of coherence of thermal excitations is a long-standing and general problem in physics. The conventional theory, i.e.…
Thermal conductivity minimum of graded superlattices due to phonon localization
Yangyu Guo, Marc Bescond, Zhongwei Zhang +4
The Anderson localization of thermal phonons has been shown only in few nano-structures with strong random disorder by the exponential decay of transmission to zero and a thermal c…
Anharmonic phonon-phonon scattering at interface by non-equilibrium Green's function formalism
Yangyu Guo, Zhongwei Zhang, Marc Bescond +3
The understanding and modeling of inelastic scattering of thermal phonons at a solid/solid interface remain an open question. We present a fully quantum theoretical scheme to quant…
Lattice Boltzmann scheme for hydrodynamic equation of phonon transport
Yangyu Guo, Moran Wang
In this work, a lattice Boltzmann scheme is developed for numerical solution of the phonon Boltzmann equation under Callaway's dual relaxation model in the hydrodynamic limit. Thro…
Quantum mechanical modeling of anharmonic phonon-phonon scattering in nanostructures
Yangyu Guo, Marc Bescond, Zhongwei Zhang +3
The coherent quantum effect becomes increasingly important in the heat dissipation bottleneck of semiconductor nanoelectronics with the characteristic size shrinking down to few na…
Self-synchronization of thermal phonons at equilibrium
Zhongwei Zhang, Yangyu Guo, Marc Bescond +3
Self-synchronization is a ubiquitous phenomenon in nature, in which oscillators are collectively locked in frequency and phase through mutual interactions. While self-synchronizati…
A generalized decay law for particle- and wave-like thermal phonons
Zhongwei Zhang, Yangyu Guo, Marc Bescond +3
Our direct atomic simulations reveal that a thermally activated phonon mode involves a large population of elastic wavepackets. These excitations are characterized by a wide distri…
Direct simulation of second sound in graphene by solving the phonon Boltzmann equation via a multiscale scheme
Xiao-Ping Luo, Yang-Yu Guo, Mo-Ran Wang +1
The direct simulation of the dynamics of second sound in graphitic materials remains a challenging task due to lack of methodology for solving the phonon Boltzmann equation in such…