Applied Physics Letters
Articles in this Issue
Photocurrent dynamics and carrier transport of amorphous-Ga2O3 metal–semiconductor–metal deep ultraviolet photodetectors
This work presents a systematic study in the photocurrent transport and transient dynamics in amorphous Ga2O3-based deep ultraviolet (DUV) photodetectors, which are configured with a co-planar metal–s...
AlN/AlScN composite film bulk acoustic wave filters for 5G bands
Bulk acoustic wave (BAW) resonators with tailored effective electromechanical coupling coefficients (Keff2) are essential for advanced filter design. Although film stack design is a common method for...
Polarization-sensitive optical coherence tomography based on speckle modulation
Polarization-sensitive optical coherence tomography (PS-OCT) provides quantifiable polarization parameters, offering enhanced material characterization and biomedical analysis. Speckle noise is an inh...
Sub-100 Ω/□ sheet resistance of GaN HEMT with ScAlN barrier
A low sheet resistance of 95.5 Ω/□ at room temperature has been demonstrated in an MBE-grown Sc0.15Al0.85N/AlN/GaN epitaxial HEMT structure. Owing to the strong spontaneous and piezoelectric polarizat...
Phase-modulated GST metasurfaces: Polarization-independent ultra-broadband absorbers and switchable photonic devices beyond amplitude modulation
We demonstrate a phase-modulation paradigm for metasurface perfect absorbers that fundamentally differs from conventional amplitude-control approaches. By strategically arranging crystalline germanium...
Die separation for mitigation of phonon bursts in superconducting circuits
Cosmic rays and background radioactive decay can deposit significant energy into superconducting quantum circuits on planar chips. This energy converts into pair-breaking phonons that travel across th...
Free induction decay gradiometer based on 87Rb MEMS vapor cell in the geomagnetic field range
We describe a magnetically silent gradiometer based on the 87Rb micro-electro-mechanical systems vapor cell with an internal volume of 0.1 cm3. The gradiometer measures the magnetic field by probing t...
High-contrast interaction between remote superconducting qubits mediated by multimode cable coupling
Superconducting quantum processors offer a promising path toward practical quantum computing. However, building a fault-tolerant quantum computer with millions of superconducting qubits is hindered by...
Early diagnosis of Parkinson's disease by highly sensitive monitoring of glucose using an atomic-level defect-enriched MoS2/Au SERS sensor enabled by LSPR-PICT synergy
In Parkinson's disease (PD), approximately 60% of the nigrostriatal neurons in the substantia nigra have degenerated before neurologists can establish a diagnosis based on widely accepted clinical dia...
Electric field-induced self-assembly of multiferroic core-shell nanocrystals in anisotropic liquid crystal medium
Here, we present the observations on the morphological appearance of multiferroic core-shell CoFe2O4/ZnO nanocrystals (CFZNCs) dispersed into the nematic liquid crystal (NLC, 5CB) matrix. A concentrat...
Comparative study of divacancies in 3C-, 4H-, and 6H-SiC
The divacancy comprising two neighboring vacant sites in the SiC lattice is a promising defect for applications in quantum technology. So far, most research has focused on the divacancy in 4H-SiC, whe...
Insights into low electronic and ultrahigh ionic conductivities of sodium tantalum oxychlorides NaTaO<i>x</i>Cl6−2<i>x</i> in crystalline and amorphous phases
Anion mixing and amorphization are recognized as an effective strategy to develop solid-state electrolytes with low electronic but high ionic conductivities. Here, we present atomistic insights into u...
An InGaN/CuSCN photoanode for visible-light photoelectrochemical photodetectors with over tenfold enhanced photocurrent
CuSCN, a wide-bandgap p-type semiconductor, is employed to boost the photocurrent of an InGaN photoanode of a photoelectrochemical photodetector. The extension of the upward energy band bending in InG...
Curvature-induced magnetic anisotropy in two-dimensional magnetic semiconductor CrSBr
Curvature-induced anisotropy and effective Dzyaloshinskii–Moriya interaction (DMI) have a major impact on magnetism in curved geometries. Two-dimensional Van der Waals materials provide an ideal platf...
Real-time control of plasma dose delivery in plasma medicine using deep reinforcement learning
This study addresses the clinical need for precise control of plasma dose delivery in plasma medicine, focusing on dose intensity rather than the complex and potentially time-varying parameters of pla...
Temperature and bias voltage control of helicity-dependent photocurrent in PbTe/PbEuTe quantum wells
We present a systematic investigation of helicity-dependent photocurrent (HDPC) in epitaxial PbTe quantum wells (QWs), revealing a striking transition in the dominant mechanism upon Pb doping. While t...
Hybrid Co/2D-WSe2-based THz spintronic emitter with tunable polarization
We demonstrate an efficient THz spintronic emitter using a Co/WSe2 heterostructure that enables direct control of the emitted THz polarization. The device is excited by femtosecond laser pulses and le...
Simultaneous enhancement of Na-ion diffusion and electronic conduction in Na3V2(PO4)2F3 cathode material by Ga doping and N-doped carbon
Na3V2(PO4)2F3 (NVPF) polyanion cathode offers high structural stability and fast Na+ migration for sodium-ion batteries (SIBs), but it suffers from low intrinsic electronic conductivity and sluggish i...
Direct nanoscale conductivity measurements of surface tracking on epoxy nanocomposites
Conductive Atomic Force Microscopy (C-AFM) was used to investigate if conductive by-products exist within surface tracks—closely related to electrical trees—that are generated by high-power surface fl...
Strain engineering of photoinduced anomalous Hall effect in topological insulator Sb2Te3
The photoinduced anomalous Hall effect (PAHE) serves as a powerful probe for investigating topological band structures in quantum materials. While three-dimensional (3D) topological insulators (TIs) l...
Giant topological Hall effect across a wide temperature range in Pt/NiCo2O4 heterostructures
The topological Hall effect (THE), a quantum phenomenon arising from the emergent magnetic field generated by a topological spin texture, is a key method for detecting non-coplanar spin structures lik...
Effect of tailoring interlayer Dzyaloshinskii–Moriya interaction chirality on domain wall propagation
Tailoring the chirality of domain walls through the interfacial Dzyaloshinskii–Moriya interaction (DMI) offers promising opportunities for developing spin-based applications. Recent theoretical and ex...
Ultrafast stochastic spiking neurons based on field-free magnetic tunnel junction
In this study, we showcase the hardware implementation of stochastic spiking neurons (SSNs) utilizing the back hopping phenomenon in a field-free magnetic tunnel junction with a well-established fabri...
Noise suppression and enhanced energy resolution in NiO/<i>β</i>-Ga2O3 radiation detectors
In this Letter, we investigated the noise sources in NiO/β-Ga2O3 p–n heterojunctions and demonstrated the field management for noise suppression to enhance radiation detection performance. Combining T...
Terahertz digital coding angular arrays based on liquid crystal for vortex beam generation
Over the past decade, terahertz (THz) technology has demonstrated significant potential to transform next-generation wireless communication and imaging systems. A key challenge, however, lies in the l...