Relationship among Structure, Disorder, Magnetism, and Band Topology in the MnSbTe·(SbTe) Family.

The interplay between topology and magnetism induces various exotic quantum phenomena, with magnetic topological insulators (MTIs) serving as a prominent example due to their ability to host the quantum anomalous Hall effect (QAHE). However, the realization of the QAHE at a higher temperature approaching the magnetic transition temperature remains a significant challenge, primarily due to the scarcity of suitable material platforms and our limited understanding of the intricate relationships among band topology, magnetism, and defects. Here, we report a comprehensive investigation of MnSbTe·(SbTe) ( = 0-5) single crystals, including the discovery of the novel MnSbTe pure phase.

Structure and transport mechanism of the human prostaglandin transporter SLCO2A1.

SLCO2A1 is a member of the organic anion transporting polypeptide (OATP) family, which preferentially transports prostaglandins (PGs) into cells and plays a vital role in regulating PGs inactivation and distribution. Dysregulation or genetic mutation of SLCO2A1 is associated with primary hypertrophic osteoarthropathy (PHO) and chronic enteropathy associated with the SLCO2A1 gene (CEAS). Although the biophysical and biochemical properties of SLCO2A1 have been characterized, the precise mechanism by which SLCO2A1 recognizes and transports PGs remains unclear.

Wafer-Scale Growth of Monolayer MoSe via Salt-Assisted Chemical Vapor Deposition.

2D transition metal dichalcogenide (TMDs) of monolayer molybdenum diselenide (MoSe) is an emerging semiconductor for next-generation electronics, owing to its remarkable physical and electronic properties. The realization of diverse device applications depends critically on the scalable synthesis of high-quality monolayer MoSe crystals, which remains challenging. In this study, the successful epitaxy of monolayer MoSe films is demonstrated on sapphire substrates at a maximum wafer size of 2 inches via a salt-assisted chemical vapor deposition (SA-CVD) technique.

Single-Crystal Structure Determination of Superconducting LaNiO under High Pressure.

Ruddlesden-Popper nickelates have attracted enormous attention since the discovery of high-temperature superconductivity in bilayer LaNiO under high pressure. However, the crystal structure under high pressure remains elusive due to the lack of single crystal diffraction data. Here, high-pressure superconductivity with a superconducting onset temperature approaching 30K and a zero-resistance state at 7K at 53.

Reconfigurable bipolar transistors enabled by breathing-Kagome NbCl.

The breathing Kagome semiconductor NbCl offers unique electronic properties, which has emerged as a prominent area of research in condensed matter physics. However, the realization of functional devices based on breathing kagome materials remains a challenge. Here, we fabricate dual-gate NbCl field-effect transistors (FETs) using h-BN or SiO as the gate dielectric.

A single-phase epitaxially grown ferroelectric perovskite nitride.

The integration of ferroelectrics with semiconductors is crucial for developing functional devices, such as field-effect transistors, tunnel junctions, and nonvolatile memories. However, the synthesis of high-quality single-crystalline ferroelectric nitride perovskites has been limited, hindering a comprehensive understanding of their switching dynamics. Here we report the synthesis and characterizations of epitaxial single-phase ferroelectric cerium tantalum nitride (CeTaN) on both oxides and semiconductors.

Highly Tunable Valley Polarization of Potential-Trapped Moiré Excitons in WSe_{2}/WS_{2} Heterojunctions.

Moiré superlattices created by stacking atomic layers of transition metal dichalcogenide semiconductors have emerged as a class of fascinating artificial photonic and electronic materials. An appealing attribute of these structures is the inheritance of the valley degree of freedom from the constituent monolayers. Recent studies show evidence that the valley polarization of the moiré excitons is highly tunable.

In-Plane Hall Effect in a RuO Single Crystal.

We present an in-plane Hall effect and magneto-transport anisotropy in RuO single crystals. A 2π-periodic in-plane Hall effect was observed in the (101)/(001) and (110) planes. Furthermore, the in-plane Hall resistivity of the single-crystal samples exhibits multiple harmonics and a nonlinear dependence on the magnetic field as the temperature decreases.

Ring polymer molecular dynamics with independent-bead approximation.

It was recently reported [Zhao et al., Phys. Rev.

Intermolecular Coulombic decay in liquid water competes with proton transfer and non-adiabatic relaxation.

Despite decades of research, our understanding of radiation damage in aqueous systems remains limited. The recent discovery of Intermolecular Coulombic Decay (ICD) following inner-valence ionization of liquid water raises interesting questions about its efficiency as a major source of low-energy electrons responsible for radiation damage. To investigate, we performed electron-electron coincidence measurements on liquid HO and DO using a monochromatized high-harmonic-generation light source, detecting ICD electrons in coincidence with photoelectrons from the 2a shell.

Spectrally sharp magnetic excitations above the critical temperature in a frustrated Weyl semimetal.

The rare-earth α-pyrochlore iridates are a prospective class of conducting frustrated magnets where electronic correlations, large spin-orbit coupling, and geometrical frustration interplay, leading to a rich set of magnetic and electronic phases. Despite their intriguing properties, the magnetic order and excitations in this fundamental class of topological quantum materials remain poorly understood due to challenges in growing large single crystals and insufficient microscopic information on their temperature-dependent phases. Here, by combining state-of-the-art thin-film synthesis, resonant elastic and inelastic X-ray scattering, spin wave analysis, and dynamical spin susceptibility calculations, we unequivocally reveal the presence of spectrally sharp, gapped magnetic excitations in YIrO that surprisingly persist well above the Néel transition temperature, signaling the presence of a quasi-universal regime connected to fluctuations on frustrated lattices.

Discovery of terahertz-frequency orbitally coupled magnons in a kagome ferromagnet.

In ferromagnetic materials, magnons-quanta of spin waves-typically resonate in the gigahertz range. Beyond conventional magnons, while theoretical studies have predicted magnons associated with orbital magnetic moments, their direct observation has remained challenging. Here, we present the discovery of two distinct terahertz orbitally coupled magnon resonances in the topological kagome ferromagnet CoSnS.

Antiferromagnet-topological insulator heterostructure for polarization-controllable terahertz generation.

Antiferromagnets (AFMs) are more advantageous in realizing ultrafast spin-based processes, but remain challenging to manipulate. The lack of proper knobs in AFM-based ultrafast devices greatly hampers their applications. Here, we innovate an antiferromagnet/topological insulator (AFM/TI) heterostructure MnSe/(Bi,Sb)Te to realize laser-induced transient magnetic moment, and further demonstrate optically controllable circularly polarized ultrafast terahertz (THz) pulse generation, under zero external magnetic field.

Scalable and Tunable In-Plane Ge/Si(001) Nanowires Grown by Molecular Beam Epitaxy.

Germanium nanostructures offer significant potential in developing advanced integrated circuits and disruptive quantum technologies, yet achieving both scalability and high carrier mobility remains a challenge in materials science. Here, we report an original low-temperature epitaxial method for the growth of site-controlled in-plane germanium nanowires with high hole mobility by molecular beam epitaxy. By reducing the growth temperature, we effectively suppress Si-Ge interdiffusion, ensuring pure germanium composition within the nanowires while preserving their high crystalline quality.

Tunable Bifurcation of Magnetic Anisotropy and Bi-Oriented Antiferromagnetic Order in Kagome Metal GdTi_{3}Bi_{4}.

The novel kagome family RTi_{3}Bi_{4} (R: rare-earth metals) offers a unique platform for exploring distinctive physical phenomena such as anisotropy, spin density wave, and anomalous Hall effect. In particular, the magnetic frustration and behavior of magnetic anisotropy in antiferromagnetic (AFM) kagome materials are of great interest for the fundamental studies and hold promise for next-generation device applications. Here, we report a tunable bifurcation of magnetic anisotropic and bi-oriented AFM order observed in the quasi-1D kagome antiferromagnet GdTi_{3}Bi_{4}.

Near Room-Temperature Ferromagnetic Phase Achieved in 4d Ruthenate via Interfacial Ferrimagnetic Coupling and Octahedral Rotation Engineering.

Transition metal oxides (TMOs) simultaneously possessing strong spin-orbit coupling, near room-temperature ferromagnetism, and excellent conductivity are scarce while they show great potential applications in oxide spintronics. Here, a TMO with all these features is reported, existing as an interfacial phase in the 4d CaSrRuO layer sandwiched by two LaMnO layers. This phase is well conductive and ferromagnetic in a wide temperature range, with the highest Curie temperature of ≈275 K among the 4d/5d-TMOs.

Theoretical insight into the role of organic ligands and metal centers on electrocatalytic hydrogen evolution activity in two-dimensional metal-organic frameworks.

Two-dimensional (2D) metal-organic frameworks (MOFs) have attracted considerable attentions in catalysis due to their exceptional high porosity and chemical tunability. By tuning metal centers and organic ligands, it is possible to precisely control the electronic structure of MOFs, offering a promising strategy to enhance catalytic performance. In this study, we performed theoretical investigations into four 2D MOFs: Cu-1,4-dicyanobenzene (Cu-DCB), Cu-1, 3-dicyanobenzene (Cu-DCB'), Cu-1,1':4',1''-terphenyl]-4,4''-dicarbonitrile (Cu-TPDCN), Cu-1,1':3',1''-terphenyl]-4,4''-dicarbonitrile (Cu-TPDCN').

Steering Magnetic Coupling in Diradical Nonbenzenoid Nanographenes.

Magnetic properties arising from controlled spin-spin interactions hold great promise for applications in spintronics and quantum technologies. In nanographenes, pentagonal and heptagonal rings introduce geometric frustration and sublattice imbalance, fundamentally altering spin localization and facilitating the emergence of open-shell structures. The precise engineering of magnetic order and coupling strength in the resulting nonbenzenoid nanographenes, however, remains a challenging and underexplored area.

Atomic manipulation of the emergent quasi-2D superconductivity and pair density wave in a kagome metal.

The unconventional charge density wave (CDW) order in layered kagome lattice superconductors AVSb (A = K, Cs or Rb) triggers the emergence of novel quantum states such as time-reversal symmetry breaking and electronic liquid crystal states. However, atomic-scale manipulation and control of such phases remains elusive. Here we observe the emergent superconductivity and a primary pair density wave at the 2 × 2 Cs reconstructed surface of CsVSb by means of low-temperature scanning tunnelling microscopy/spectroscopy paired with density functional theory calculations.

Designing guidance for multiple valley-based topological states driven by magnetic substrates: potential applications at high temperatures.

Valley-based topological phases offer a wealth of exotic quantum states with tunable functionalities, driven by the valley degree of freedom. In this work, by constructing heterostructures of germanene (silicene, stanene) on various magnetic substrates, we address key tuning factors such as the spin-orbit coupling (SOC) strength of the substrate, magnetic orientations, and stacking orders, all of which govern multiple valley-based topological features. We present a comprehensive guiding principle for the efficient manipulation of these features, achieved simply by designing and modulating the magnetic properties of the underlying substrates.

Atmospheric Pressure Synthesis of Ultrathin Monoclinic FeCrS Crystals with Robust Antiferromagnetism.

The synthesis of unconventional phases in two-dimensional (2D) materials can unlock unique properties not readily observed in their bulk counterparts. Recently, the naturally occurring monoclinic phase of FeCrS, which forms under extremely high pressure, has been discovered in meteorites. However, the properties of this unconventional phase have not yet been explored.

Repeater-like asynchronous measurement-device-independent quantum conference key agreement.

Quantum conference key agreement (QCKA) enables secure communication among multiple parties by leveraging multipartite entanglement, which is expected to play a crucial role in future quantum networks. However, its practical implementation has been severely limited by the experimental complexity and low efficiency associated with the requirement for synchronous detection of multipartite entangled states. In this work, we propose a measurement-device-independent QCKA protocol that employs asynchronous Greenberger-Horne-Zeilinger state measurement.

Magnetic Order Induced Chiral Phonons in a Ferromagnetic Weyl Semimetal.

Chiral phonons are vibrational modes in a crystal that possess a well-defined handedness or chirality, typically found in materials that lack inversion symmetry. Here, we report the discovery of chiral phonon modes in the kagome ferromagnetic Weyl semimetal Co_{3}Sn_{2}S_{2}, a material that preserves inversion symmetry but breaks time-reversal symmetry. Using helicity-resolved magneto-Raman spectroscopy, we observe the spontaneous splitting of the doubly degenerate in-plane E_{g} modes into two distinct chiral phonon modes of opposite helicity when the sample is zero-field cooled below the Curie temperature in the absence of an external magnetic field.

The inadequacy of the ρ-T curve for phase transitions in the presence of magnetic fields.

The resistivity-temperature () curve is traditionally employed to distinguish metallic, semiconducting, and insulating behaviors in materials, with deviations often interpreted as evidence of phase transitions. However, such interpretations are valid only under specific conditions, including the presence of a magnetic field. This study critically reexamines the curve in magnetic environments.