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Dipole-induced transitions from Schottky to Ohmic contact at Janus MoSiGeN/metal interfaces.
Nanoscale Horiz
January 2025
SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
Janus MoSiGeN monolayers exhibit exceptional mechanical stability and high electron mobility, which make them a promising channel candidate for field-effect transistors (FETs). However, the high Schottky barrier at the contact interface would limit the carrier injection efficiency and degrade device performance. Herein, using density functional theory calculations and machine learning methods, we investigated the interfacial properties of the Janus MoSiGeN monolayer and metal electrode contacts.
View Article and Find Full Text PDFHigher precision constraints on the tau in LHC photon-initiated production: a full account of hadron dissociation and soft survival effects.
Eur Phys J C Part Fields
December 2024
Department of Physics and Astronomy, University College London, London, WC1E 6BT UK.
Article Synopsis
- This study is the first to calculate how photon-initiated pair production is affected by non-zero anomalous magnetic and electric dipole moments of leptons, considering their interplay with survival factors and potential dissociation of hadron beams.
- The authors found that the impact of these factors is generally minor (on the percent level) in current experimental analyses but will become more significant as measurement precision improves.
- To assist future research, the calculations have been integrated into the SuperChic Monte Carlo generator, allowing simulation of this process with adjustable parameters without additional reruns.
All-dielectric metasurface (ADM) absorbers driven by quasi-bound states in the continuum (BIC) are critical for high-performance optoelectronic devices due to their ability to offer high -factor absorption. However, these all-dielectric metasurfaces usually require the aid of degenerate critical coupling schemes or back-metal reflective layers to achieve high absorption, which often suffers from limitations such as sensitive geometrical parameters, ohmic losses, and low -factors. This work presents an ADM for high- near-perfect light absorption, which consists of double Si nanorods and SiO/TaO multilayers.
View Article and Find Full Text PDFConstraints on Covariant Dark-Matter-Nucleon Effective Field Theory Interactions from the First Science Run of the LUX-ZEPLIN Experiment.
Phys Rev Lett
November 2024
University of Califonia, Los Angeles, Department of Physics & Astronomy, Los Angeles, Califonia 90095-1547, USA.
Article Synopsis
- The LUX-ZEPLIN (LZ) experiment is a significant scientific study using a dual-phase xenon chamber located underground in South Dakota to search for dark matter interactions.
- The study extends existing theories to include relativistic effects, providing new constraints on the interactions between weakly interacting massive particles and nucleons based on their electric and magnetic dipole moments.
- Results include 90% confidence level limits on the coupling strength of five different interactions, analyzed over a specific energy range, which advances our understanding in particle physics beyond previous nonrelativistic effective field theories.
Asymmetric dumbbell dimers simultaneously supporting quasi-bound states in continuum and anapole modes for terahertz biosensing.
Nanophotonics
September 2024
Institute of Modern Optics, Nankai University, Tianjin, China.
Multi-resonant metasurfaces are of great significance in the applications of multi-band nanophotonics. Here, we propose a novel metasurface design scheme for simultaneously supporting quasi-bound states in continuum (QBIC) and other resonant modes, in which QBIC resonance is generated by mirror or rotational symmetry breaking in oligomers while other resonant modes can be simultaneously excited by rationally designing the shapes of meta-atoms within oligomers. As an example, the simultaneous excitation of QBIC and anapole modes are demonstrated in a dimer metasurface composed of asymmetric dumbbell-shaped apertures.
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