Applied Physics Letters
Articles in this Issue
Hybrid porous Helmholtz resonator metasurfaces with decoupled amplitude-phase modulations for finely tunable frequency-multiplexed acoustic holograms
We propose a metasurface design filled with porous medium inside Helmholtz resonators, which can project multiple predesigned images at different frequencies. It is easier to fabricate and more practi...
Catastrophic burnout mechanisms of NiO/<b> <i>β</i> </b>-Ga2O3 heterojunction diodes irradiated by 1.35 GeV high-energy heavy ions
Ultra-wide bandgap beta-phase gallium oxide (β-Ga2O3) power devices hold great promise in space applications; however, their intrinsic vulnerability to heavy ion irradiation, particularly defect behav...
Rapid, versatile, and reliable metrology for multi-layer transition metal dichalcogenide thin films using atomic force microscopy to investigate surface grain distributions
Molybdenum disulfide (MoS2) has garnered significant attention among 2D materials, demonstrating great potential for electronics and optoelectronics. Although numerous growth techniques have been expl...
Simultaneously upgrading the power conversion efficiency and the moisture resistance of perovskite solar cells by blending CsI into carbon-electrode
Three kinds of alkaline-metal iodide salts (CsI, LiI, and KI) are blended in the carbon paste, which is then used to coat the carbon-electrode (CE) on perovskite (PVSK) layer, then the resultant CE ba...
High-speed and multi-level AlScN ferroelectric memristor on CMOS-compatible tungsten for electronic synapses
The AlN doped with Sc has a high residual polarization value, and good ferroelectricity has become a research hotspot. However, traditional growth of AlScN typically requires substrates such as sapphi...
Vector pulse magnet
The underlying symmetry of the crystal, electronic structure, and magnetic structure manifests itself in the anisotropy of materials' properties, which is a central topic of the present condensed matt...
Characterization of fluorite-structured ferroelectrics using transmission electron microscopy: Techniques, challenges, and recent advances
Fluorite-structured ferroelectrics, such as hafnium oxide and its alloyed variants, are key candidates for next-generation memory devices. Yet, fundamental questions about switching mechanisms, domain...
Interfacial synergy of micro-/nanoscale triboelectric materials for efficient triboelectric nanogenerators
Triboelectric nanogenerators (TENGs) offer a promising route for harvesting ambient mechanical energy, but their widespread application is hindered by low power density. In this work, an interfacial s...
Giant orbital Hall effect and field-free magnetization switching in rare-earth samarium/platinum metallic heterostructures
Orbital current refers to the flow generated by transmitting the orbital angular momentum of electrons. Compared to spin current, orbital current exhibits distinct advantages, including lower critical...
Thickness-dependent retention–endurance trade-off in scaled Hf0.5Zr0.5O2 ferroelectric capacitor
Hafnium zirconium oxide (Hf0.5Zr0.5O2) has emerged as a leading candidate for next-generation ferroelectric memory due to its superior scalability. However, the fundamental trade-offs between thicknes...
Observation of asynchronous ferromagnetic resonance in antiferromagnetically coupled sublattices
Antiferromagnets and ferrimagnets are two kinds of classic magnetic materials and are particularly important for modern magnonic and spintronic devices because of their steadily coupled antiferromagne...
Percolation-driven bandgap narrowing and magnetic ordering in Ni<b>++</b>-implanted GaN
Ion implantation introduces structural disorder in semiconductors, yet a predictive framework linking implantation parameters to phase transitions remains lacking. In this work, we investigate the eme...
Substantial enhancement of thermoelectric performance in <i>n</i>-type AgBiSe2<i>via</i> Mn3+ doping
In recent years, I-V-VI2 compounds have attracted significant scholarly attention due to their inherently low thermal conductivity. However, almost no n-type counterpart with a similar rock salt struc...
Spontaneous magnetization induced by organic ion intercalation in the layered antiferromagnet MnPSe3
Exploring novel two-dimensional (2D) magnetic insulators and achieving tunable magnetic properties are fundamental for their potential applications in information processing and storage. In this work,...
Resonantly enhanced evaporation sensing in liquid droplet whispering-gallery cavities
We experimentally demonstrate resonantly enhanced measurements of droplet evaporation by tracking whispering-gallery-mode resonances. Droplet optical Q-factors exceeding 2×108, coupled to a standard o...
Tuning polariton vortices in an asymmetric ring potential
Exciton polariton condensates are macroscopic coherent states in which topological excitations can be observed. In this work, we observe the excitation of the vortices and realize tuning the topologic...
Building-up process of power conversion in carbon-electrode-based, hole-conductor-free mesoscopic perovskite solar cells
The building-up process of power conversion in carbon-electrode-based mesoscopic perovskite solar cells is monitored by prolonging the annealing period of the lead halide perovskite (PVSK) precursor i...
Efficient magneto-tunable photocurrent in multiferroics
Efficient photocurrent generation in multiferroics Bi6Ti3CoxFe2−xO18 (x = 0.0–0.5) is achieved under the influence of an external magnetic field. By concurrently tracking changes in ferroelectric doma...
Deciphering the true active phases of bifunctional oxygen electrocatalyst in rechargeable zinc–air batteries: A case study of CoMoO4
Efficient bifunctional oxygen electrocatalysis is essential for rechargeable metal–air batteries; however, their real active phases under operational conditions remain largely unexplored. In this stud...
Dual-mode operation of ring-shaped spin Hall magnetoresistance sensor with biaxial sensing capability
We present a spin Hall magnetoresistance sensor based on a NiFe/Pt multiring bridge structure, which exhibits high sensitivity and good linearity in two perpendicular directions within the sensor plan...
High-performance triple-band ultraviolet photodetector based on mixed-phase InGaO thin film for material identification
The wavelength-dependent nature of material reflectance in the ultraviolet (UV) range makes multi-band UV response analysis an effective technique for material identification. In this work, a triple-b...
Photovoltaic effects of the GaAs (110) substrate and GaAs/AlGaAs core–shell nanowires
A semiconductor with a polar crystal symmetry can exhibit the bulk photovoltaic (BPV) effect, which can generate a photocurrent and photovoltage without requiring an interface, such as a p–n junction...
Orientation-dependent <i>β</i>-Ga2O3 heterojunction diode with atomic layer deposition (ALD) NiO
This work reports the demonstration of ALD-deposited NiO/β-Ga2O3 heterojunction diodes (HJDs) on low doped (ND-NA ≤ 1 × 1016 cm−3) drift layers and highly doped (001) & (100) n+ substrates (ND-NA ...
Research on the interface characteristics and leakage mechanisms of <b> <i>β</i> </b>-Ga2O3 MFIS capacitors using an HfO2–ZrO2 superlattice layer
This letter reports the fabrication and characterization of β−Ga2O3 metal/ferroelectric/insulator/semiconductor (MFIS) capacitors employing 3 types of HfO2–ZrO2 superlattice (SL) ferroelectric gate di...
Decoupling capillary force-viscous resistance trade-off by shape-gradient microgrooves wick design
The long-distance capillary transport is fundamentally hindered by the trade-off between the capillary force and viscous resistance, which limits the wicking performance of conventional microstructure...