Results 101 to 110 of about 94,440 (338)

Intertwined Topological Phases in TaAs2 Nanowires with Giant Magnetoresistance and Quantum Coherent Surface Transport

open access: yesAdvanced Materials, EarlyView.
Synthesis of topological semimetal TaAs2 nanowires in situ encapsulated with a thin SiO2 shell unravel a richness of intertwined topological phases manifested by their magnetotransport features: A near‐room‐temperature metal‐to‐insulator transition, strong expressions of topologically nontrivial surface transport, giant magnetoresistance with direction‐
Anand Roy   +9 more
wiley   +1 more source

Proper-time method for unequal masses

open access: yesPhysics Letters B, 2021
The result of removing of heavy non-equal mass particles from the theory can be described, at low energy, by the effective action, which is a series in inverse-square powers of the mass.
A.A. Osipov
doaj  

Weak magnetism in chiral quark models [PDF]

open access: yes, 2000
We discuss symmetry breaking in the weak magnetism form factors for the semileptonic octet baryon decays. In the chiral quark model, the symmetry breaking can be accounted for in the masses and the quark spin polarizations can take on more general values
Ohlsson, Tommy, Snellman, Hakan
core   +2 more sources

Acoustic Moiré Flat Bands in Twisted Heterobilayer Metasurface

open access: yesAdvanced Materials, EarlyView.
This research proposes a heterobilayer moiré acoustic metasurface using two distinct lattice structures. The heterobilayer design contributes to divergent dispersion curves for the upper and lower layers and allows for greater flexibility in tuning their hybridization through interlayer twisting.
Shida Fan   +7 more
wiley   +1 more source

A simple mass-splitting mechanism in the Skyrme model

open access: yesPhysics Letters B, 2018
It is shown that the addition of a single chiral symmetry breaking term to the standard ω-meson variant of the nuclear Skyrme model can reproduce the proton–neutron mass difference.
J.M. Speight
doaj  

Halide Perovskite Photocatalysts for Clean Fuel Production and Organic Synthesis: Opportunities and Challenges

open access: yesAdvanced Materials, EarlyView.
This review provides the state‐of‐the‐art overview of halide perovskite‐based photocatalysts for hydrogen production from water and halogen acid solutions, CO2 reduction into value‐added chemicals, and organic chemical transformations. Different types of halide perovskite photocatalysts and their relative efficiencies for hydrogen generation and CO2 ...
Siddharth Singh   +8 more
wiley   +1 more source

Band gap opening by two-dimensional manifestation of Peierls instability in graphene

open access: yes, 2011
Using first-principles calculations of graphene having high-symmetry distortion or defects, we investigate band gap opening by chiral symmetry breaking, or intervalley mixing, in graphene and show an intuitive picture of understanding the gap opening in ...
Ajiki H.   +43 more
core   +1 more source

Challenges and Opportunities of Upconversion Nanoparticles for Emerging NIR Optoelectronic Devices

open access: yesAdvanced Materials, EarlyView.
The special photo‐responsiveness of upconversion nanoparticles has opened up a new path for the advancement of near‐infrared (NIR)‐responsive optoelectronics. However, challenges such as low energy‐conversion efficiency and high nonradiative losses still persist.
Sunyingyue Geng   +7 more
wiley   +1 more source

Time-Reversal Symmetry Breaking and Spontaneous Anomalous Hall Effect in Fermi Fluids

open access: yes, 2008
We study the spontaneous non-magnetic time-reversal symmetry breaking in a two-dimensional Fermi liquid without breaking either the translation symmetry or the U(1) charge symmetry.
E. Fradkin   +4 more
core   +1 more source

DNA‑Directed Assembly of Photonic Nanomaterials for Diagnostic and Therapeutic Applications

open access: yesAdvanced Materials, EarlyView.
DNA‐directed assembly offers a powerful strategy for constructing structured photonic nanomaterials with precise spatial control. This review provides a comprehensive overview of recent advancements in DNA‐assembled photonic nanomaterials for diagnostics and therapeutics, highlighting key design principles, functionalization strategies, and optical ...
Longjiang Ding   +5 more
wiley   +1 more source

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