Applied Physics Letters
Articles in this Issue
Ultrathin fully strained GaN channel high electron mobility transistors on AlN-on-sapphire templates engineered by ferroelectric ScAlN epilayers
In this work, we demonstrate fully strained GaN channel high electron mobility transistors (HEMTs) with superlattice barriers on AlN-on-sapphire templates by plasma-assisted molecular beam epitaxy. He...
Device-area selection of memristive transport regimes in epitaxial Hf0.5Zr0.5O2-based ferroelectric devices
Ferroelectric memristive devices based on hafnia are promising systems for neuromorphic electronics, yet the interplay between polarization-modulated resistive changes and defect-mediated transport of...
Improved light extraction and thermal management in thin-film GaAs LEDs using hemispherical ZnSe lenses
High-index optical elements enable improved photon outcoupling from high-refractive index III–V emitters, but their feasibility on electrically driven GaAs light-emitting diodes (LEDs) has been limite...
Heterocyclic aromatic amine-modified hole transport layer enables energy level regulation for enhanced performance of deep blue QLEDs
Quantum dots (QDs) exhibit great promise for next-generation displays, yet deep blue quantum dots light-emitting diodes [deep blue QLEDs, CIE (International Commission on illumination) y < 0.06...
High-thermal-conductivity polycrystalline diamond grown on GaN via a cyclic-methane-modulation-assisted strategy
The self-heating effect severely limits the performance and reliability of GaN high-electron-mobility transistors (HEMTs). Direct deposition of thin-film polycrystalline diamond (PCD) on GaN is regard...
Probe–suspended membrane resonance model for obtaining out-of-plane shear modulus and prestress in graphene
The out-of-plane shear modulus of two-dimensional (2D) materials is critical for understanding their strain-modulated electronic, optical, and tribological behavior. However, existing experimental met...
Ferroelectric nitrogen-polar ScAlN heterostructures on 4H-SiC enabled by thin AlN buffer layers
The expansive functional landscape of ferroelectric nitrides has sharpened interest in host platforms that can preserve excellent structural quality while extending operation to high-temperature, hars...
Heat superdiffusion in carbon nanotubes
Like many one-dimensional systems, carbon nanotubes are known to exhibit a divergent thermal conductivity as the length of the nanotube is increased, but the precise form of this divergence has so far...
Self-powered solar-blind ultraviolet detection and integrated electroluminescence performance of Ga2O3:Er-based devices
Gallium oxide (Ga2O3) exhibits broad application prospects in solar-blind ultraviolet detection and rare-earth-activated electroluminescence (EL). However, the high-density intrinsic defects within Ga...
Spring-integrated low-frequency ME resonator with strong coupling capability and low equivalent magnetic noise
Resonant magnetoelectric (ME) sensors offer the advantages of high sensitivity and inherent narrow-band filtering capability. However, the development of ultra-low-frequency (ULF) ME resonators combin...
Critical behavior of a novel layered ferromagnetic semiconductor Cr1.17Ga1.47Se4
Layered magnetic semiconductors have attracted considerable interest due to their rich magnetic properties and potential applications in low-dimensional spintronics. Here, we report a novel layered ma...
Bandgap-dependent defect properties in mixed-halide perovskites
Defects in wide-bandgap perovskite solar cells critically limit device performance, yet their chemical nature and bandgap-dependent evolution remain insufficiently understood. Here, we investigate the...
Unipolar ferroelectric synapses with subfemtojoule energy consumption
Neuromorphic computing demands artificial synapses that combine ultra-low energy consumption with simple modulation schemes. Here, we demonstrate unipolar ferroelectric tunnel junction synapse based o...
Theoretical strategy for coherent perfect absorption based on photonic time crystals: Interference and energy control
Photonic time crystals (PTCs) are artificial materials whose electromagnetic (EM) properties vary with time, enabling the realization of physical phenomena and energy conversion devices through the ut...
Low optical loss electrical isolation for multi-section monolithic GaSb-based photonic circuits
Monolithic photonic integrated circuit (PIC) platforms exploiting III–V materials combine passive and active waveguide structures in multi-section optoelectronic device architectures. Their operation...
Parametric resonance and RF-to-THz frequency conversion in semiconductor plasmonic crystals
We show that plasma excitations in nanoscale field-effect transistor structures with periodically alternating gated and ungated regions (plasmonic crystals) exhibit a band structure with finite curvat...
Prediction of mass spectra using large chemical language models and verification of adaptability in data-scarce domains
Machine learning methods for predicting the electron ionization mass spectra from molecular structures have shown promise for environmental chemical identification, but their performance under domain-...
Defect engineering via O-Se co-treatment enabled high-performance self-powered Au/O-Se MoS2/In photodetector
Self-powered photodetectors (SPPDs) are essential for energy-self-sufficient optical imaging and optical communication applications. However, the defects generated in two-dimensional transition metal...
Electrostatically confined charge transport in split-gated MoS2 device
As semiconductor scaling approaches the quantum limit, transport phenomena increasingly deviate from classical behavior, necessitating the development of electrostatically defined low-dimensional arch...
Wet-spinning vanadium oxide-based coaxial fibers for the construction of zinc-ion batteries
Fiber-shaped aqueous zinc-ion batteries (FAZIBs) emerge as a promising energy storage device for future wearable electronics. Vanadium-based oxides possess high theoretical capacity, benefiting from t...
Toroidal quasi-dark supermodes in microwave dielectric metasurfaces
We report a class of dielectric metasurfaces that support quasi-dark microwave resonances with tailored toroidal and antitoroidal field profiles. The metasurfaces are realized using quadrumers of high...
Synergistic effect of waste sisal fiber-derived carbon and graphene oxide for performance enhancement of sulfur-based thermally regenerative batteries
Sulfur-based thermally regenerative batteries (STRBs) offer a promising approach for low-grade waste heat recovery. To enhance their power output, we develop a sulfur electrode using a composite of si...
High-performance phototransistors based on heterojunctions of organic semiconductors and 2D perovskite single crystals
Two-dimensional (2D) organic–inorganic hybrid perovskites are promising candidates for optoelectronic applications owing to their excellent optoelectronic properties and enhanced stability compared to...
High quantum-efficiency InGaAs/InP photodiodes heterogeneously integrated on SiN waveguides
The integration of photodiodes with optical waveguides is increasingly important for photonic integrated circuit development. We report modified uni-traveling-carrier photodiodes heterogeneously integ...
Constraints on atomistic disorder for scalable electron spin shuttling
Electron spin shuttling—the gate-controlled, coherent transport of electrons between qubit registers—increases qubit connectivity and enables efficient quantum-error-correction schemes. It is emerging...