Results 61 to 70 of about 1,383,284 (307)

Robust nonreciprocal acoustic propagation in a compact acoustic circulator empowered by natural convection

open access: yesNew Journal of Physics, 2019
The development of the quantum Hall effect in condensed matter physics that breaks time-reversal symmetry by magnetic biasing has inspired its analog in classical nonreciprocal acoustics.
Xingxing Liu   +3 more
doaj   +1 more source

A Soft Microrobot for Single‐Cell Transport, Spheroid Assembly, and Dual‐Mode Drug Screening

open access: yesAdvanced Materials, EarlyView.
A soft, untethered hydrogel microrobot enables precise single‐cell delivery, self‐assembly into 3D spheroids, and real‐time thermal actuation. Driven by light‐induced convection and embedded with gold nanorods and temperature sensors, the microrobot guides cells, modulates local microenvironments, and supports drug testing.
Philipp Harder   +3 more
wiley   +1 more source

Quantum acoustics unravels Planckian resistivity [PDF]

open access: green, 2023
Alhun Aydin   +2 more
openalex   +1 more source

Chiral Acoustic Phonon and Conservation of Pseudoangular Momentum in α‐Quartz

open access: yesAdvanced Materials, EarlyView.
Chiral acoustic phonons in α‐quartz are probed via Brillouin light scattering, exploiting the photon's helicity and the crystal's handedness. The interaction obeys a selection rule arising from pseudoangular momentum conservation, enabling direct optical access to phonon chirality in nonsymmorphic crystals.
Changsoo Kim   +8 more
wiley   +1 more source

Observation of multiple rotons and multidirectional roton-like dispersion relations in acoustic metamaterials

open access: yesNew Journal of Physics, 2022
Roton dispersion relations were firstly predicted by Landau and have been extensively explored in correlated quantum systems at low temperatures. Recently, the roton-like dispersion relations were theoretically extended to classical acoustics, which ...
Zhenxiao Zhu   +10 more
doaj   +1 more source

Giant Berry‐phase‐Driven X‐Ray Beam Translations in Strain‐Engineered Semiconductor Crystals

open access: yesAdvanced Materials, EarlyView.
Due to the Berry‐phase effect, X‐rays propagating in deformed crystals undergo large translations, interesting for X‐ray optics applications. Here, the lattice expansion observed upon H irradiation of dilute‐nitride semiconductors is exploited to engineer the deformation landscape of selectively hydrogenated GaAsN epilayers.
Marco Felici   +9 more
wiley   +1 more source

35-th Winter School on Wave and Quantum Acoustics

open access: yesArchives of Acoustics, 2014
Ustroń, 27-th February - 3-rd March 2006 I have a great pleasure to give the "Archives of Acoustics" Readers possibility acquaint with topics presented at 35-th Winter School on Wave and Quantum Acoustics.
Roman BUKOWSKI
doaj  

Weyl points and topological surface states in a three-dimensional sandwich-type elastic lattice

open access: yesNew Journal of Physics, 2020
Following the realization of Weyl semimetals in quantum electronic materials, classical wave analogues of Weyl materials have also been theorized and experimentally demonstrated in photonics and acoustics.
Sai Sanjit Ganti   +2 more
doaj   +1 more source

Handed Magnon Propagation in Easy‐Axis Antiferromagnetic α‐Fe2O3

open access: yesAdvanced Materials, EarlyView.
Coherent excitation and detection of handed magnons are achieved in the easy‐axis antiferromagnet α‐Fe2O3. An external magnetic field lifts the degeneracy between left‐ and right‐handed magnons without affecting their propagation velocity. The Dzyaloshinskii–Moriya interaction and anisotropy modulate their amplitude and damping, enabling intrinsic ...
Chang Xu   +3 more
wiley   +1 more source

Quantum Eigenstates of Curved and Varying Cross-Sectional Waveguides

open access: yesApplied Sciences, 2020
A simple one-dimensional differential equation in the centerline coordinate of an arbitrarily curved quantum waveguide with a varying cross section is derived using a combination of differential geometry and perturbation theory.
Jens Gravesen, Morten Willatzen
doaj   +1 more source

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