Journal of Applied Physics
Articles in this Issue
Picosecond programmable magnetoresistive artificial synapse with a compact arc-shaped domain wall track
An arc-shaped domain wall (DW) track is used to construct a compact sub-micrometer domain wall magnetic tunnel junction (DW-MTJ) device for application as an artificial synapse. DW-MTJ devices, offeri...
Experimental and numerical investigation of surface overpressure distribution characteristics generated from high-aspect-ratio linear charge in ground explosion
Linear charges are widely employed in military demining operations and civilian blasting engineering. Current research on blast load distribution from linear charges primarily focuses on underwater or...
Cryogenically enhanced quasi-optical resonator for megawatt pulsed millimeter-wave sources
We report the design, cryogenic optimization, and performance modeling of a compact quasi-optical ring resonator intended to compress microwaves pulses at 170 and 250 GHz to the megawatt level. By com...
Muon portable imager for counter-terrorism—MuPIC
We present recently developed portable muon tracking detectors based on robust and modern technology for imaging applications. Muon Portable Imager for Counter-terrorism (MuPIC) exploits triangular pl...
Phonon Olympics: Phonon property and lattice thermal conductivity benchmarking from open-source packages
Three widely used open-source packages for determining phonon properties and lattice thermal conductivities (ALAMODE, phono3py, and ShengBTE) are benchmarked by teams of expert users and the package d...
Correct quantification of oxygen vacancies in ferroelectric hafnia
Determination of the oxygen vacancies (VO) distribution within ultra-thin film ferroelectric hafnia (HfO2)-based devices is crucial to engineering optimal properties for non-volatile memory and logic...
Impact of bulk conduction phenomena on the temporal stability of piezoelectric behavior of engineered PDMS ferroelectrets
Engineered ferroelectrets show great promise as high-performance piezoelectric materials; however, there is a limited range of materials compatible with microfabrication techniques and that possess su...
Development of composite material with epoxy resin–magnetite for dielectric resonator antenna
Composite materials of epoxy resin–magnetite (Fe3O4) are developed with different weight percentages of Fe3O4. Measured permittivity is found to increase with the increasing weight percentage of Fe3O4...
The influence of laser power modulation on melt pool dynamics in laser powder bed fusion
While the majority of laser powder bed fusion (LPBF) metal additive manufacturing uses a continuous wave (CW) laser heat source, some commercial applications of LPBF additive manufacturing instead inv...
Modeling micro- and nanoscale phonon transport using an improved spherical harmonic approximation to the Boltzmann transport equation
The phonon Boltzmann transport equation (BTE) is an accurate and reliable tool for modeling phonon transport from nano- to macroscale. However, its numerical solution remains computationally intensive...
The effects of Ag and Au nanoparticles for resonant excitations on the spectral enhancement of nanoparticle enhanced laser-induced breakdown spectroscopy
We have investigated the spectral emission of Cu in an aqueous solution with Ag and Au nanoparticle (NP) enhanced laser-induced breakdown spectroscopy. Solutions of metal NPs and CuSO4 are prepared th...
When does a drop stop bouncing on a cold surface?
Drop bouncing is intriguing when interacting with solidification, and yet, such an interaction is less known. This paper delves into drop bouncing in practical three-dimensional printing conditions. A...
The halogen vacancy, Tl-activator, and Tl-bound excitons in CsI:Tl scintillator
Recent decades have witnessed a concerted effort toward the discovery of new inorganic scintillators with higher light yield and better proportionality. There has been remarkable success as judged by...
Flexoelectricity enhanced photocatalysis in Bi4Ti3O12 for binary dye degradation
Bismuth titanate (Bi4Ti3O12, BTO) was prepared via the solid-state reaction route. Flexoelectricity was induced in the powder sample through rapid cooling to room temperature (350–20 °C) to produce th...
A broadband high-frequency magnetoelectric antenna based on dual-resonance energy-trapping mode
High-frequency magnetoelectric (ME) antennas provide a compact form factor and low power consumption for miniaturized wireless systems. However, the development of high-frequency ME antennas is constr...
Direction finding by learning-assisted programmable metasurface
This study explores the assistance of supervised machine learning to a programmable metasurface for precise direction finding. The programmable metasurface plays the role of an electronic-scanning ref...
Evidence for Ga clusters in β-Ga2O3 from Raman spectroscopy and density functional theory
Monoclinic gallium oxide (β-Ga2O3) single crystals have a Raman mode at ∼250 cm−1 that is strongly correlated with free-electron density. Prior work attributed this peak to an electronic excitation of...
Carrier concentration adjustment in graphene QHR devices for metrology applications
We report on the reversible tuning of the carrier concentration n of molecular-doped epigraphene designed for application as a quantum Hall resistance standard. Fine tuning of the carrier concentratio...
Positron interaction with beryllium and its compounds BeX (X = H, N, O)
Beryllium is chosen as one of the plasma-facing wall materials for fusion devices like the International Thermonuclear Experimental Reactor and Joint European Torus. Positron interaction with Be and i...
Single-crystalline Si1−xGex:B films with active doping concentration up to 3.5 × 1021 cm−3
High doping level in Si(Ge) is crucial for reducing contact resistance of transistors, which is key for lowering power consumption in advanced nodes. In this paper, we report exceptionally high active...
Monte Carlo simulation of secondary electron emission from amorphous carbon-coated copper surface with rectangular grooves
Secondary electron emission (SEE) critically limits the performance of high-power microwave components and particle accelerators. Amorphous carbon (a-C) films featuring a low secondary electron yield...
Strain-engineered anomalous Nernst effect and layer-polarized anomalous Hall response in RuBr2
The anomalous Nernst effect (ANE) has gained attention as a viable mechanism for transverse thermoelectric energy conversion. In this work, we systematically investigate the impact of strain on the AN...
Defect-induced phonon-resonant scattering and its influence on thermal transport of irradiated thorium-dioxide
Thermal transport in proton irradiated thorium-dioxide (ThO2) is investigated. Using a combination of experiments and first-principles computational framework, the role of lattice defects on thermal c...