Results 61 to 70 of about 4,136 (218)
Advanced Science, EarlyView.Indium substitution in Ag2Se nanocrystals simultaneously tailors electronic structure and lattice dynamics. Fermi‐level upshift and band‐gap narrowing enhance electrical transport, while defect‐induced lattice softening intensifies phonon scattering and suppresses lattice thermal conductivity.
Yineng Gou +11 more
wiley +1 more source
Two-Dimensional Phononic Crystal Simulation and Analysis [PDF]
, 2006 This thesis presents the design of a two-dimensional phononic band gap crystal simulator, and phononic crystal analysis. Phononic crystals and their application to microwave acoustic filters are studied. Wave mechanics is introduced.
Norris, Ryan Christopher
core
Vibration Properties of a Steel-PMMA Composite Beam
Shock and Vibration, 2015 A steel-polymethyl methacrylate (steel-PMMA) beam was fabricated to investigate the vibration properties of a one-dimensional phononic crystal structure.
Yuyang He, Xiaoxiong Jin
doaj +1 more source
Observation of Excitonic Instability in a Monolayer Ta2NiSe5 With Strain Disorder
Advanced Science, EarlyView.Monolayer Ta2${\rm Ta}_2$NiSe5${\rm NiSe}_5$ sustains an excitonic insulating phase up to 190 K, with Raman signatures of gap opening and critical excitonic fluctuations. Thickness‐independent large gap ratios highlight strong exciton‐phonon coupling, while substrate‐induced strain disorder depresses Tc, establishing monolayer Ta2${\rm Ta}_2$NiSe5${\rm
So Young Kim +13 more
wiley +1 more source
Shock and Vibration, 2015 A new two-dimensional locally resonant phononic crystal with microcavity structure is proposed. The acoustic wave band gap characteristics of this new structure are studied using finite element method.
Mao Liu +3 more
doaj +1 more source
Layer‐Dependent Phonon Polaritons in hBN Resolved by Photo‐Induced Force Spectroscopy
Advanced Science, EarlyView.Layer‐dependent phonon polariton resonances in hexagonal boron nitride are systematically investigated using photo‐induced force microscopy. The in‐plane resonance exhibits a blueshift, while the out‐of‐plane resonance shows a redshift with increasing thickness. These results establish layer number as a key parameter for tuning polaritonic responses in
Amin Hajarian, Jiwoo Seo, SungWoo Nam
wiley +1 more source
Refraction characteristics of phononic crystals [PDF]
Acta Mechanica Sinica, 2015 The refraction properties of phononic crystals are revealed by examining the anti-plane shear waves in doubly periodic elastic composites with unit cells containing rectangular and/or elliptical inclusions. The band-structure, group velocity, and energy-flux vector are calculated using a powerful variational method which accurately and efficiently ...
openaire +5 more sources
The acoustic insulation performance of infinite and finite locally resonant metamaterial and phononic crystal plates [PDF]
MATEC Web of Conferences, 2019 The bending wave stop band behavior of locally resonant metamaterial and phononic crystal plates can strongly improve the vibration performance of flexible plates in targeted frequency ranges.
Van Belle Lucas +3 more
doaj +1 more source
Chemically Programmable Underwater Sound‐Absorbing Metamaterial via MXene Self‐Assembly
Advanced Science, EarlyView.MXene self‐assembly creates a chemically programmable underwater metamaterial with quasi‐periodic layers and a chemical‐physical multi‐level constraint system. A crosslinker as a ‘chemical scissor’ precisely edits microscopic interactions, exciting deep‐subwavelength strong local resonances that induce near‐zero/negative effective bulk modulus (Keff ...
Ziwen Gan +5 more
wiley +1 more source
Advanced Electronic Materials, EarlyView.Our work bridges the gap between skyrmion discovery and material design by demonstrating how atomic‐scale control of exchange interactions enables tunable skyrmion phase transitions in centrosymmetric magnetic metals. ABSTRACT Magnetic skyrmions are topologically protected spin states that hold promise for shaping the future of electronics.
Dasuni N. Rathnaweera +9 more
wiley +1 more source