Institute of Physics

Magnetic properties of ultrafine M-type hexaferrite nanoparticles with tunable sizes prepared by glass-ceramic method

Ultrafine M-type hexaferrite Ba 1- x Sr x Fe₁₂O₁₉ nanoparticles ( x = 0–0.8) were synthesized via a glass-ceramic route where the grain size was controlled by controlling the BaO/SrO ratio in precursor glasses. Sr 2+ substitution induces lattice contraction and reduces the averag...

Programmable Temporal Dynamics in a Laser Neuron for High‐Speed Photonic Reservoir Computing

ABSTRACT Memory and nonlinearity play crucial roles in reservoir computing (RC) performance, with different tasks requiring different levels of these properties. However, in most physical RC systems, memory and nonlinearity are fixed or can only be changed through hardware redesi...

Structure‐Property Engineering in Ag 23 Nanoclusters for Electrocatalytic Nitrate Reduction

ABSTRACT Electrocatalytic nitrate reduction reaction (NO 3 RR) provides a sustainable pathway for ambient ammonia synthesis; however, achieving concurrent high activity, high selectivity and appropriate stability of catalysts remains a substantial challenge. Here we report the sy...

Crystal Chemistry of a Nickelate Superconductor: La/Pr Distribution, Oxygen Stoichiometry, and High-Pressure Structural Evolution in La2PrNi2O7

Abstract We report a comprehensive structural characterization of La2PrNi2O7, a bilayer Ruddlesden–Popper nickelate that has been described to exhibit high-temperature superconductivity under hydrostatic pressure. Synchrotron X-ray diffraction (SXRD) data and high-resolution neut...

Sliding-ferroelectric order imprinted onto excitonic and valley responses in van der Waals heterostructures

Ferroelectricity driven by interlayer sliding provides a distinct route to nonvolatile control in van der Waals (vdW) heterostructures, yet resolving stacking-dependent ferroelectric states and their local interfacial consequences remains challenging. Here, we report that bilayer...

Domain-Wall-Mediated Ultralow-Barrier Sliding and Pinning in Ferroelectric Moire Superlattices Revealed by Machine Learning

Abstract Sliding ferroelectrics built from stacked nonpolar monolayers enable out-of-plane polarization and unconventional switching via interlayer sliding, yet the microscopic sliding dynamics remain unclear. Using machine-learning molecular dynamics, we reveal spontaneous, ther...

Termination-Dependent Surface States and Magnetic Fingerprints of Chiral Helimagnet Cr1/3TaS2

Abstract Chiral helimagnets based on intercalated transition-metal dichalcogenides, characterized by nanoscale spin ordering, provide a powerful route to engineer chiral spin textures (e.g., the topologically protected magnetic solitons) and explore emergent electronic functional...

Ni–Zn–Ga Alloy for Weak Sunlight‐Driven Methanol Production From CO 2 and H 2 O at Ambient Pressure

ABSTRACT The sunlight‐driven artificial photosynthesis that converts CO 2 and H 2 O into methanol is a promising approach for carbon‐neutral fuel synthesis, but conventional systems require elevated pressure while producing methane by‐products, hindering practical operation. Here...

Spin Splitting Coupled Visible‐Light Driven Injection Photocurrent in Bilayer Altermagnets

ABSTRACT Altermagnets host symmetry‐protected spin splitting without net magnetization, offering a new platform for spin‐dependent transport and optical responses. Here we demonstrate that bilayer altermagnets enable efficient and tunable second‐order injection photocurrents in t...

Phosphoric Acid Cross-linking Regulates Closed Pores for Scalable Hard Carbon Anodes

Abstract The low-voltage capacity of hard carbon anodes, governed by closed-pore structures, directly determines the energy density of Na-ion batteries (NIBs), yet rational regulation of closed pores remains challenging. Herein, we report a phosphoric acid-induced cross-linking s...

Exploring efficient Pd-based single-atom catalyst on Sc2CO2 MXene by strain engineering

MXenes have exhibited significant potential in energy storage and conversion technologies for their superior structural stability, rich active sites, and metallic conductivity. We investigated the structural stability and electrocatalytic activity of Pd-doped Sc 2 CO 2 MXene unde...

Protocol for measuring above-threshold ionization spectra driven by few-cycle laser pulses in frustrated tunneling ionization regime

Above-threshold ionization (ATI) spectra in the frustrated tunneling ionization (FTI) regime demonstrate control of bound-state populations via the carrier-envelope phase (CEP). Here, we present a protocol for acquiring ATI spectra from argon gas driven by few-cycle laser pulses....

TiN buffer-assisted low-temperature epitaxy of 4-inch AlScN films

Abstract Wurtzite AlScN films have emerged as promising ferroelectric layers for next-generation memory and piezoelectric devices due to their high remanent polarization, excellent thermal stability (up to 1 100 °C), scalability to nanometer thickness, and back-end-of-line comple...

Triple‐Phase Synergistic Bulk‐Surface Engineering Enables High‐Rate and Long‐Cycling P2/O3‐Based Cathode for Na‐Ion Batteries

ABSTRACT Layered oxide cathodes hold great promise for Na‐ion batteries (NIBs) but suffer from rapid performance degradation under high voltage, primarily arising from severe lattice strain, transition metal migration, and detrimental surface degradation. Here, we report a triple...

Phase Boundary Engineering Enables Multivalley Activation for High-Performance ZrCoSb Half-Heuslers

Abstract P-type ZrCoSb-based half-Heusler compounds are promising thermoelectric materials for high-temperature power generation because of their excellent thermal stability and mechanical robustness. However, their performance still lags behind that of state-of-the-art p-type Zr...

Ternary-Ion Batteries

Abstract The advancement of rechargeable batteries has long been dominated by two principal paradigms: single-ion and dual-ion mechanisms. The single-ion mechanism, operating via the shuttling of monovalent cations, offers high energy density yet suffers from inherent kinetic lim...

On-Surface Molecular Design and Synthesis of Discrete Metal–Fullerene Complexes on Graphite

Abstract On-surface synthesis enables the fabrication of molecular complexes, which cannot be obtained through traditional solution chemistry. Generally, metal substrates have been used due to their catalytic properties. Here, a tripod-like magnetic molecular complex, (C60)3–Co,...

Electrically controllable superconducting memory effect in UTe2

Abstract Multiphase superconductors—materials that host two or more distinct superconductive phases—are exceptionally rare. Examples include heavy-fermion CeRh 2 As 2 alongside some uranium compounds such as UPt 3 and URhGe (refs. 1,2,3 ). In the multiphase p -wave superfluid 3 H...

Polymorphic crystallites model for monolayer amorphous materials

Establishing atomistic models of amorphous materials remains a central challenge in materials science. Here, we examine three representative multicomponent monolayer systems using first-principles-trained machine-learning potentials and an energy-guided Monte Carlo structural-sea...

Disentangling the effect of space and electric field on photoelectrochemical water splitting

Photoelectrochemical water splitting is a promising pathway for renewable solar fuel production. The photoelectrochemical performance strongly depends on the charge separation ability within the space charge layer. In space charge layer, the charge dynamics should be governed by...