71 citations · 433 across the 17 of their papers we have counts for
17 papers
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…
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…
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…
Off-center Rattling Triggers High-Temperature Thermal Transport in Thermoelectric lathrates: Non-Perturbative Approach
Qing Xi, Zhongwei Zhang, Tsuneyoshi Nakayama +3
Lattice thermal conductivities of type-I clathrates encapsulating "off-center" guest atoms behave in a way that is sharply different from those of conventional crystals…
Hopping Processes Explain T-linear Rise of Thermal Conductivity in Thermoelectric Clathrates above the Plateau
Qing Xi, Zhongwei Zhang, Jie Chen +3
Type-I clathrate compounds with off-center guest ions realize the phonon-glass electron-crystal concept by exhibiting almost identical lattice thermal conductivities to…
Type-I and type-II Dirac fermions in graphene with nitrogen-molecule line defects
Honghong Zhang, Yuee Xie, Chengyong Zhong +2
Recently, type-II Dirac fermions characterized by strongly titled Dirac cones have been proposed. The new fermions exhibit unique physical properties different from the type-I Dira…
Dirac Nodal Lines and Tilted Semi-Dirac Cones Coexisting in a Striped Boron Sheet
Honghong Zhang, Yuee Xie, Zhongwei Zhang +4
The enchanting Dirac fermions in graphene stimulated us to seek for other two-dimensional (2D) Dirac materials, and boron monolayers may be a good candidate. So far, a number of mo…
New record of high ZT found in hybrid transition-metal-dichalcogenides
Yulou Ouyang, Yuee Xie, Zhongwei Zhang +2
The search for thermoelectrics with higher figures of merit (ZT) will never stop due to the demand of heat harvesting. Single layer transition metal dichalcogenides (TMD), namely M…
A systematic investigation of thermal conductivities of transition metal dichalcogenides
Zhongwei Zhang, Yuee Xie, Yulou Ouyang +1
The thermal conductivities of MoS2 and WS2 have been reported by some experimental and theoretical studies, however, the results are different from each other. Here, thermal transp…
Electron and phonon properties and gas storage in carbon honeycomb
Yan Gao, Yuanping Chen, Chengyong Zhong +3
A new kind of three-dimensional carbon allotropes, termed carbon honeycomb (CHC), has recently been synthesized [PRL 116, 055501 (2016)]. Based on the experimental results, a famil…
Phonon transport in single-layer Boron nanoribbons
Zhongwei Zhang, Yuee Xie, Qing Peng +1
Inspired by the successful synthesis of several allotropes, boron sheets have been one of the hottest spot areas of focus in various fields. Here, we study phonon transport in thre…
Transition of thermal rectification in silicon nanocones
Zhongwei Zhang, Yuanping Chen, Yuee Xie +1
Current understanding of thermal rectification asserts that the rectification ratio (R), which measures the relative heat flux between two ends of a nanostructure, is determined by…
Geometry, stability and thermal transport of hydrogenated graphene nanoquilts
Zhongwei Zhang, Yuee Xie, Qing Peng +1
Geometry, stability, and thermal transport of graphene nanoquilts folded by hydrogenation are studied using molecular dynamics simulations. The hydrogenated graphene nanoquilts sho…
Thermal transport in MoS2/Graphene hybrid nanosheets
Zhongwei Zhang, Yuee Xie, Qing Peng +1
Heat dissipation is a very critical problem for designing nano-functional devices, including MoS2/Graphene heterojunctions. In this paper we investigate thermal transport in MoS2/G…