149 citations · 473 across the 12 of their papers we have counts for
12 papers
Two-Path Phonon-Interference Resonance Induces a Stop Band in Silicon Crystal Matrix by Embedded Nanoparticles Array
Shiqian Hu, Lei Feng, Shao Cheng +2
In this work, we report a new stop-band formation mechanism by performing the atomistic Green's function calculation and the wave-packet molecular dynamics simulation for a system…
Revisiting PbTe to identify how thermal conductivity is really limited
Shenghong Ju, Takuma Shiga, Lei Feng +1
Due to the long range interaction in lead telluride (PbTe), the transverse optical (TO) phonon becomes soft around the Brillouin zone center. Previous studies have postulated that…
Ultimate confinement of phonon propagation in silicon nano-crystalline structure
Takafumi Oyake, Lei Feng, Takuma Shiga +3
Temperature-dependent thermal conductivity of epitaxial silicon nano-crystalline (SiNC) structures composed of nanometer-sized grains separated by ultra-thin silicon-oxide (SiO2) f…
Phonon-interference resonance effects in nanoparticles embedded in a matrix
Lei Feng, Takuma Shiga, Haoxue Han +3
We report an unambiguous phonon resonance effect originating from germanium nanoparticles embedded in silicon matrix. Our approach features the combination of phonon wave-packet me…
Designing nanostructures for interfacial phonon transport via Bayesian optimization
Shenghong Ju, Takuma Shiga, Lei Feng +3
We demonstrate optimization of thermal conductance across nanostructures by developing a method combining atomistic Green's function and Bayesian optimization. With an aim to minim…
Thermal conductivity spectrum calculation from first-principles-based harmonic phonon theory
Takuma Shiga, Daisuke Aketo, Lei Feng +1
In recent years, nanostructuring of dielectric and semiconducting crystals has enhanced controllability of their thermal conductivity. To carry out computational material search fo…
Nano-Cross-Junction Effect on Phonon Transport in Silicon-Nanowire-Cages
Dengke Ma, Hongru Ding, Han Meng +4
Wave effects of phonons can give rise to controllability of heat conduction beyond that by particle scattering at surfaces and interfaces. In this work, we propose a new class of 3…
Phonon transport in perovskite SrTiO3 from first principles
Lei Feng, Takuma Shiga, Junichiro Shiomi
We investigate phonon transport in perovskite strontium titanate (SrTiO3) which is stable above its phase transition temperature (~105 K) by using first-principles molecular dynami…
Controlling the Interlayer Coupling of Twisted Bilayer Graphene
Lan Meng, Wei Yan, Zhao-Dong Chu +5
The interlayer coupling of twisted bilayer graphene could markedly affect its electronic band structure. A current challenge required to overcome in experiment is how to precisely…
Flat Bands near Fermi Level of Topological Line Defects on Graphite
Lei Feng, Xianqing Lin, Lan Meng +3
Flat bands play an important role in the study of strongly correlated phenomena, such as ferromagnetism, superconductivity, and fractional quantum Hall effect. Here we report direc…
Single-layer behavior and slow carrier density dynamic of twisted graphene bilayer
Lan Meng, Yanfeng Zhang, Wei Yan +4
We report scanning tunneling microscopy (STM) and spectroscopy (STS) of twisted graphene bilayer on SiC substrate. For twist angle ~ 4.5o the Dirac point ED is located about 0.40 e…
Electromagnetic interaction between a metallic nanoparticle and surface in tunnelling proximity modelling and experiment
J. Mitra, Lei Feng, Michael G. Boyle +1
We simulate the localized surface plasmon resonances of an Au nanoparticle within tunneling proximity of a Au substrate and demonstrate that the modes may be identified with those…