Applied Physics Letters
Articles in this Issue
Weyl semimetal engineering by symmetry control in NiTe2
In this work, we investigate the emergence of Weyl points in an inversion symmetry-breaking 1T-NiTe2 system. Through first-principles calculations based on the density functional theory combined with...
Anomalous tip-sample distance behavior on the tip-enhanced Raman spectroscopy of graphene in ambient conditions
Tip-enhanced Raman spectroscopy (TERS) combines Raman spectroscopy with scanning probe microscopy to overcome the spatial resolution limitation imposed by light diffraction, offering a primary optical...
Phonon chirality and Hall effect in Janus materials
Janus materials provide an intrinsic platform for inversion-symmetry breaking and chirality-related phonon phenomena. Here, based on first-principles calculations, we investigate the impact of out-of-...
Pressure-induced emission of dopant-free SU-8 for passive photonic devices
SU-8, a widely used negative-tone photoresist in microelectronics, has low optical loss and excellent processability, making it promising for photonic integrated devices. However, most existing SU-8-b...
Site-selective enhancement of Eu emission in delta-doped GaN
Europium-doped gallium nitride (GaN:Eu) is a promising platform for classical and quantum optoelectronic applications. When grown using organometallic vapor-phase epitaxy, the dominant red emission fr...
Current conduction across multilayer and delaminated MXene Schottky interfaces on <i>n</i> -GaAs and their photoresponse
We report the current conduction across multilayer and delaminated Ti3C2Tx two-dimensional transition metal carbides (MXene)-based Schottky interfaces formed on n-type GaAs. Two types of Ti3C2Tx MXene...
On the importance of the optical anisotropy in the detection of coherent acoustic phonons in a time-domain Brillouin scattering experiment
In this perspectives paper, we discuss the role of optical anisotropy in detecting coherent acoustic phonons in a time-domain Brillouin experiment. First, we present the general theoretical background...
Performance enhancement of fluorescence molecular tomography imaging based on maximally weighted iteration strategy
Fluorescence molecular tomography (FMT) reconstruction represents an ill-posed inverse problem, and the existing solution methods often serve as estimators that tend to introduce reconstruction errors...
Room-temperature calcium intercalation into graphite catalyzed by sodium
Calcium (Ca) intercalation into graphite (C) has been considered to require elevated temperatures, and its occurrence at room temperature (RT) has long been regarded as highly unlikely. Here, we demon...
Significant recrystallization suppression in a nickel-based single crystal superalloy during solution treatment via alternating magnetic field
Recrystallization during heat treatment deteriorates nickel-based single crystal superalloys. This study demonstrates that alternating magnetic field (AMF) significantly suppresses recrystallization i...
Enhanced performance of inverted CsPbI3 perovskite solar cells by using carbohydrazide interface modification
Inorganic perovskite CsPbI3, with its suitable bandgap and excellent thermal stability, is a promising light-absorbing material for perovskite solar cells (PSCs). However, the detrimental defects in C...
Lattice thermal conductivity origin of Mg3Sb2: A study via self-consistent phonon theory with bubble correction
Zintl-phase Mg3Sb2-based thermoelectric materials exhibit remarkable performance; however, pronounced inconsistencies remain in the reported lattice thermal conductivity (κl) and its temperature depen...
High density two-dimensional Dirac fermion gas in HgTe quantum wells of critical width
We report on magnetotransport and cyclotron resonance studies of 2D Dirac fermions in HgTe quantum wells with a near-critical thickness of 6.2 nm. By investigating carrier densities up to Ns = 5.6 × 1...
Structural distortion-induced acoustic velocities and elasticity softening in compressed (TiZrNbTaW)C high-entropy carbide
Unraveling pressure-induced elastic weakening mechanisms is crucial for understanding and exploring the structure–property–pressure relationships of high-entropy carbides (HECs). Using in situ synchro...
High-Q terahertz sensor based on semiconductor material with annular geometry
This paper proposes a terahertz sensor incorporating an annular grating that enables strong absorption at 5.485 and 6.895 THz. The physical origin of the resonance peaks is elucidated by impedance mat...
Distribution of 7Li implants in Nb films for a sterile neutrino search
The Beryllium-7 Electron capture in Superconducting Tunnel junctions (BeEST) experiment searches for sub-MeV sterile neutrinos by measuring the 7Li recoil spectrum from 7Be decay in Ta-based supercond...
Nonlinear tuning of magnon–photon coupling through pump-induced magnon modes
We investigate the nonlinear tuning of magnon–photon interactions in a dissipative magnon–photon system by introducing a nonlinear pump-induced magnon (PIM) mode. By aligning the pump microwave freque...
Raman scattering fingerprints of the charge density wave state in one-dimensional NbTe4
Charge density waves (CDWs) are ordered quantum states of conduction electrons accompanied by periodic lattice distortions. Raman scattering (RS) spectroscopy is, therefore, well suited for probing CD...
Growth of wurtzite Hf <i>x</i> Al1 <b>−</b> <i>x</i> N up to x <b>=</b> 0.39 by sputtering with bandgap shift and c/a-ratio anomaly
Alloying hafnium nitride (HfN) into aluminum nitride (AlN) has been predicted to enhance the piezoelectric response beyond that achieved by scandium nitride (ScN) alloying into AlN, making hafnium alu...
Temporal ghost imaging using integrated chaotic lasers
We experimentally demonstrate temporal ghost imaging (TGI) based on an integrated chaotic laser. The chaotic laser is a monolithically integrated four-section semiconductor laser, consisting of two di...
A 2.7 kV AlGaN/GaN high electron mobility transistor with an anti-parallel low turn-on voltage GaN Schottky barrier diode
In this work, AlGaN/GaN reverse conduction HEMTs (RC-HEMTs) integrated with anti-parallel Schottky barrier diodes (SBDs) are demonstrated. Benefiting from the idealized Schottky interface of AlGaN/GaN...
Transition from one-step to stepwise propagation of a positive streamer with varying pulse durations in an argon plasma jet
Atmospheric pressure plasma jet normally behaves as a positive streamer, whose head is honored as a powerful chemical reactor that can produce active species for various applications. Revealing and un...
Selenium-containing amino acid passivated deep-red perovskite quantum dot light-emitting diodes
Perovskite quantum dot (QD) light-emitting diodes (LEDs) typically exhibit a trade-off between emission efficiency and spectral stability. This compromise primarily arises from nonradiative recombinat...
Impact of nitrogen and oxygen interstitials on niobium SRF cavity performance
Superconducting radio frequency (SRF) cavities are the leading technology for highly efficient particle acceleration, and their performance can be significantly enhanced through the controlled introdu...
Analysis of a novel heterojunction thermoradiative structure
The heterojunction thermoradiative design introduced here has a recombination-photon emission layer in its junction, as does the homojunction thermoradiative device. However, the heterojunction struct...