Applied Physics Letters
Articles in this Issue
Efficient conversion of near-field spherical waves to surface waves for microwave energy harvesting
Efficient near-field microwave power reception is fundamentally challenged by the spherical nature of incident wavefronts. We address this limitation by demonstrating a receiver based on an explicit a...
Direct observation of the (de)lithiation process on the multi-particle LiFePO4 by <i>in situ</i> TEM
The development of nanostructured LiFePO4 (LFP) electrodes represents a prominent research direction in the Li-ion battery field, owing to its intrinsic advantages such as high theoretical capacity an...
Oxidation degradation of TiN electrodes in DRAM capacitors and mitigation through AlN insertion
Given the increasing demand for high-performance capacitors in dynamic random access memories (DRAMs), boosting the dielectric constant (k) to maximize capacitance density becomes critical, which requ...
214 MW/cm2 vertical <i>β</i> -Ga2O3 UMOSFETs enabled by HF sidewall treatment
Vertical β-Ga2O3 U-shaped trench structures (UMOSFETs) incorporating current-blocking layers typically suffer from increased on-resistance, primarily caused by deep-level defect states in the trench s...
Modulation of Fe doping tail for high CW power handling and OIP3 in HEMT-based RF switches compatible with PA co-integration
In this work, we present the first investigation into the impact mechanism of Fe doping tails on the radio frequency (RF) switching performance of AlGaN/gallium nitride (GaN) high electron mobility tr...
The mechanism of single-event burnout in NiO/ <i>β</i> -Ga2O3 heterojunction diodes under atmospheric neutron irradiation
This study investigates the mechanism of single-event burnout (SEB) in NiO/β-Ga2O3 heterojunction diode (HJD) induced by atmospheric neutron. The degradation mode and physical mechanism are evaluated...
Spectroscopic investigation of Fermi level pinning at metal oxide/polymer interfaces and implications for built-in voltage
The built-in potential (Vbi) critically governs charge injection and transport in organic and hybrid optoelectronic devices. While self-assembled monolayers (SAMs) are commonly used to tune electrode...
Strain-engineered photogalvanic anisotropy in SnP2X6 (X = S, Se) monolayers for high-performance optoelectronics
The photogalvanic effect (PGE) in non-centrosymmetric materials can generate stable currents without external bias, holding significant potential for optoelectronic applications. However, the limited...
Chiral-sensitive frequency mixing in valley-excited two-dimensional semiconductors
Two-dimensional (2D) semiconductors endowed with valley degree of freedom offer potential applications in next-generation petahertz valleytronics and photonics for emerging quantum technologies. We ex...
Generation of a large-diameter diffuse plume in an atmospheric pressure argon plasma jet with a single tube
From a practical application viewpoint, the generation of a large-diameter plume is of great importance for the atmospheric pressure plasma jet. In this Letter, a large-diameter argon plume is generat...
Nonlinear symmetry breaking to enhance the Sagnac effect in a microresonator gyroscope
Optical gyroscopes based on the Sagnac effect have been widely used for inertial navigation in aircraft, submarines, satellites, and unmanned robotics. With the rapid progress in the field of ultrahig...
Surface-localized magnetic order in RuO2 thin films revealed by low-energy muon probes
Ruthenium dioxide (RuO2) has recently emerged as an altermagnetic candidate, but its intrinsic magnetic ground state in thin films remains widely debated. This study aims to clarify the nature and spa...
Quantitative resolution of grain boundary impedance in Ce-doped Li7La3Zr2O12 through the distribution of relaxation time analysis and electrochemical performance in quasi solid-state batteries
Li7La3Zr2O12 (LLZO) garnets have many characteristics that make these materials a good solid electrolyte for Li-ion batteries, but their poor interfacial properties and limited ionic conductivity cont...
Achieving high carrier concentration β-Ga2O3 epilayers via MOCVD using SiCl4 as dopant
Gallium oxide (Ga2O3) transparent conductive electrodes and power-device contact layers are critical components for Ga2O3-based electronics. However, the intrinsically low electron mobility (μ) of the...
High-current, high-voltage AlN p–n junction diodes enabled by compositional grading
AlN p–n junction diodes with low specific ON-resistance (1.6 mΩ cm2), enabling forward current densities &gt;1 kA/cm2, and reverse breakdown fields of 8 MV/cm, were demonstrated. The quasi-vertica...
Cryogenic (Cu64.5Al24Mn11.5)99.5Cr0.5 superelastic alloy with broad temperature window of elastocaloric effect
We report giant elastocaloric effect over a broad temperature window from 90 to 420 K in a Cr-doped directionally solidified (Cu64.5Al24Mn11.5)99.5Cr0.5 cryogenic shape memory alloy with ⟨001⟩A prefer...
Identifying anyonic topological order in fractional quantum anomalous Hall systems
Recently observed fractional quantum anomalous Hall (FQAH) materials are candidates for topological quantum hardware, but their required anyon states are elusive. We point out dependence on monodromy...
A weakness breakdown model of a BOPP film based on blister growth under cyclic pulsed voltage
The investigation of failure mechanisms in thin-film materials has consistently been a critical aspect of ensuring the reliability of energy storage devices. In this study, full-lifecycle pulsed elect...
One-step implementation of a hybrid discrete-variable–continuous-variable phase gate with multiple photonic qubits in circuit QED
Quantum phase gates are of fundamental interest in quantum physics and play an important role in quantum communication and quantum computing. Here, we propose a scheme to implement a hybrid discrete-v...
Anomalous low-field magnetoresistance in Fe3Ga4 single crystals
Fe3Ga4 possesses a helical spin spiral with a complex competition between ferromagnetic and antiferromagnetic ground states. This competition generates multiple metamagnetic transitions that are gover...
The heating and cooling of 2D electrons at low temperatures
We present measurements of the cooling length ℓE for hot electrons in a GaAs-based high-mobility two-dimensional electron gas. The thermal measurements are performed on a long 60 μm-wide channel, whic...
Unveiling bonding heterogeneity-driven anharmonicity and ultralow lattice thermal conductivity in NbSe2Br2: A machine learning accelerated discovery
Transition metal chalcogenide halide (TM–Ch–X) compounds with significant heterogeneity in their chemical bonding have immense potential for thermoelectric applications. Their mixed ionic–covalent bon...
Enhanced photocurrent and responsivity of Bi2O2Se nanosheet near-infrared photodetector by <i>in situ</i> surface growth of Te nanowires
The intrinsically weak optical absorption and limited photocarrier separation of atomically thin two-dimensional (2D) materials often limit the photodetector performance. Here, we report an in situ su...
Probing cellulose hydrogel dehydration with Brillouin spectroscopy: Insights into mechanical properties
Hydrogels are three-dimensional networks of hydrophilic polymers that retain large amounts of water and can be tailored for medicine, agriculture, electronics, and cosmetics. Their softness and tunabl...
A low-cost green mixed antisolvent strategy for strain-release and defect-reduction toward efficient perovskite solar cells
Antisolvent engineering is among the most widely used techniques for fabricating high-efficiency perovskite solar cells (PSCs). Recent mixed antisolvent strategies have shown great promise for enhanci...