Potential magnetic structure in Eu3InAs3 revealed by magnetization and thermodynamic study.

We systematically investigate the magnetization and thermodynamic responses associated with antiferromagnetic (AFM) transitions in single crystals of the magnetic semiconductor Eu3InAs3. The linear thermal expansion measurements around the AFM transition temperatures, TN1 and TN2, indicate an expansion along the a axis and contraction along the b and c axes. The calculated ∆V/V(T) shows a continuous change at TN, indicating a second-order magnetic phase transition.

Epitaxial Stabilization of a Pyrochlore Interface between Weyl Semimetal and Spin Ice.

Pyrochlore materials are known for their exotic magnetic and topological phases arising from complex interactions among electron correlations, band topology, and geometric frustration. Interfaces between different pyrochlore crystals characterized by complex many-body ground states hold immense potential for novel interfacial phenomena due to the strong interactions between these phases. However, the realization of such interfaces has been severely hindered by limitations in material synthesis methods.

Sliding ferroelectric memories and synapses based on rhombohedral-stacked bilayer MoS.

Recent advances have uncovered an exotic sliding ferroelectric mechanism, which endows to design atomically thin ferroelectrics from non-ferroelectric parent monolayers. Although notable progress has been witnessed in understanding the fundamental properties, functional devices based on sliding ferroelectrics remain elusive. Here, we demonstrate the rewritable, non-volatile memories at room-temperature with a two-dimensional (2D) sliding ferroelectric semiconductor of rhombohedral-stacked bilayer MoS.

Medium-scale flexible integrated circuits based on 2D semiconductors.

Two-dimensional (2D) semiconductors, combining remarkable electrical properties and mechanical flexibility, offer fascinating opportunities for flexible integrated circuits (ICs). Despite notable progress, so far the showcased 2D flexible ICs have been constrained to basic logic gates and ring oscillators with a maximum integration scale of a few thin film transistors (TFTs), creating a significant disparity in terms of circuit scale and functionality. Here, we demonstrate medium-scale flexible ICs integrating both combinational and sequential elements based on 2D molybdenum disulfide (MoS).

Robust ferromagnetism in wafer-scale FeGaTe above room-temperature.

The discovery of ferromagnetism in van der Waals (vdW) materials has enriched the understanding of two-dimensional (2D) magnetic orders and opened new avenues for fundamental physics research and next generation spintronics. However, achieving ferromagnetic order at room temperature, along with strong perpendicular magnetic anisotropy, remains a significant challenge. In this work, we report wafer-scale growth of vdW ferromagnet FeGaTe using molecular beam epitaxy.

Highly Efficient Electrode of Dirac Semimetal PtTe for MoS-Based Field Effect Transistors.

Two-dimensional van der Waals (vdW) layered materials not only are an intriguing fundamental scientific research platform but also provide various applications to multifunctional quantum devices in the field-effect transistors (FET) thanks to their excellent physical properties. However, a metal-semiconductor (MS) interface with a large Schottky barrier causes serious problems for unleashing their intrinsic potentials toward the advancements in high-performance devices. Here, we show that exfoliated vdW Dirac semimetallic PtTe can be an excellent electrode for electrons in MoS FETs.

Unraveling the Interplay Between Memristive and Magnetoresistive Behaviors in LaCoO/SrTiO Superlattice-Based Neural Synaptic Devices.

Memristors and magnetic tunnel junctions are showing great potential in data storage and computing applications. A magnetoelectrically coupled memristor utilizing electron spin and electric field-induced ion migration can facilitate their operation, uncover new phenomena, and expand applications. In this study, devices consisting of Pt/(LaCoO/SrTiO)/LaCoO/Nb:SrTiO (Pt/(LCO/STO)/LCO/NSTO) are engineered using pulsed laser deposition to form the LCO/STO superlattice layer, with Pt and NSTO serving as the top and bottom electrodes, respectively.

Doping Elemental 2D Semiconductor Te through Surface Se Substitutions.

The development of two-dimensional (2D) semiconductors is limited by the lack of doping methods. We propose surface isovalent substitution as an efficient doping mechanism for 2D semiconductors by revealing the evolution of the structure and electronic properties of 2D Se/Te. Because of the different electronegativity of Se and Te, Se substitution for Te at the specific lattice sites introduces electric dipoles and leads to charge redistribution, which lowers the work function and tunes the Te films from p-type to n-type semiconductors.

Molecular Hydride Superconductor BiH with up to 91 K at 170 GPa.

In pursuit of high- hydride superconductors, the molecular hydrides have attracted less attention because the hydrogen quasimolecules are usually inactive for superconductivity. Here, we report on the successful synthesis of a novel bismuth hydride superconductor 2/-BiH at pressures around 170-180 GPa. Its structure comprises bismuth atoms and elongated hydrogen molecules with a H-H bond length of 0.

Uncovering Emergent Spacetime Supersymmetry with Rydberg Atom Arrays.

In the zoo of emergent symmetries in quantum many-body physics, the previously unrealized emergent spacetime supersymmetry (SUSY) is particularly intriguing. Although it was known that spacetime SUSY could emerge at the (1+1)d tricritical Ising transition, an experimental realization is still absent. In this Letter, we propose to realize emergent spacetime SUSY using reconfigurable Rydberg atom arrays featuring two distinct sets of Rydberg excitations, tailored for implementation on dual-species platforms.

Large Band Splitting in g-Wave Altermagnet CrSb.

Altermagnetism (AM), a newly discovered magnetic state, ingeniously integrates the properties of ferromagnetism and antiferromagnetism, representing a significant breakthrough in the field of magnetic materials. Despite experimental verification of some typical AM materials, such as MnTe and MnTe_{2}, the pursuit of AM materials that feature larger spin splitting and higher transition temperature is still essential. Here, our research focuses on CrSb, which possesses Néel temperature of up to 700 K and giant spin splitting near the Fermi level (E_{F}).

Controllable Synthesis of High-Quality Magnetic Topological Insulator MnBiTe and MnBiTe Multilayers by Chemical Vapor Deposition.

With a nontrivial topological band and intrinsic magnetic order, two-dimensional (2D) MnBiTe-family materials exhibit great promise for exploring exotic quantum phenomena and potential applications. However, the synthesis of 2D MnBiTe-family materials via chemical vapor deposition (CVD), which is essential for advancing device applications, still remains a significant challenge since it is difficult to control the reactions among multi-precursors and form pure phases. Here, we report a controllable synthesis of high-quality magnetic topological insulator MnBiTe and MnBiTe multilayers via an evaporation-rate-controlled CVD approach.

Symmetry invariants and classes of quasiparticles in magnetically ordered systems having weak spin-orbit coupling.

Symmetry invariants of a group specify the classes of quasiparticles, namely the classes of projective irreducible co-representations in systems having that symmetry. More symmetry invariants exist in discrete point groups than the full rotation group O(3), leading to new quasiparticles restricted to lattices that do not have any counterpart in a vacuum. We focus on the fermionic quasiparticle excitations under "spin-space group" symmetries, applicable to materials where long-range magnetic order and itinerant electrons coexist.

Confined Magnetization at the Sublattice-Matched Ruthenium Oxide Heterointerface.

Creating a heterostructure by combining two magnetically and structurally distinct ruthenium oxides is a crucial approach for investigating their emergent magnetic states and interactions. Previously, research has predominantly concentrated on the intrinsic properties of the ferromagnet SrRuO and recently discovered altermagnet RuO solely. Here, the study engineers an ultrasharp sublattice-matched heterointerface using pseudo-cubic SrRuO and rutile RuO, conducting an in-depth analysis of their spin interactions.

Improved conduction and orbital polarization in ultrathin LaNiO sublayer by modulating octahedron rotation in LaNiO/CaTiO superlattices.

Artificial oxide heterostructures have provided promising platforms for the exploration of emergent quantum phases with extraordinary properties. Here, we demonstrate an approach to stabilize a distinct oxygen octahedron rotation (OOR) characterized by in the ultrathin LaNiO sublayers of the LaNiO/CaTiO superlattices. Unlike the OOR in the LaNiO bare film, the OOR favors high conductivity, driving the LaNiO sublayer to a metallic state of ~100 K even when the layer thickness is as thin as 2 unit cells (u.

Orbital-selective effect of spin reorientation on the Dirac fermions in a non-charge-ordered kagome ferromagnet FeGe.

Kagome magnets provide a fascinating platform for the realization of correlated topological quantum phases under various magnetic ground states. However, the effect of the magnetic spin configurations on the characteristic electronic structure of the kagome-lattice layer remains elusive. Here, utilizing angle-resolved photoemission spectroscopy and density functional theory calculations, we report the spectroscopic evidence for the spin-reorientation effect of a kagome ferromagnet FeGe, which is composed solely of kagome planes.

Room-Temperature Ferromagnetism with Strong Spin-Orbit Coupling Achieved in CaRuO Interfacial Phase via Magnetic Proximity Effect.

Recently, theoretical and experimental research predicted that ferromagnets with strong spin-orbit coupling (SOC) could serve as spin sources with dramatically enhanced spin-orbit torque (SOT) efficiency due to the combination of spin Hall effect and anomalous Hall effect (AHE), presenting potential advantages over conventional nonmagnetic heavy metals. However, materials with a strong SOC and room-temperature ferromagnetism are rare. Here, we report on a ferromagnetic (FM) interfacial phase with Curie temperature exceeding 300 K in the heavy transition-metal oxide CaRuO, in proximity to LaSrMnO.

Superconductivity and nematic order in a new titanium-based kagome metal CsTiBi without charge density wave order.

The cascade of correlated topological quantum states in the newly discovered vanadium-based kagome superconductors, AVSb (A = K, Rb, and Cs), with a Z topological band structure has sparked immense interest. Here, we report the discovery of superconductivity and electronic nematic order in high-quality single-crystals of a new titanium-based kagome metal, CsTiBi, that preserves the translation symmetry, in stark contrast to the charge density wave superconductor AVSb. Transport and magnetic susceptibility measurements show superconductivity with an onset superconducting transition temperature T of approximately 4.

Electronic and magnetic excitations in LaNiO.

High-temperature superconductivity was discovered in the pressurized nickelate LaNiO which has a unique bilayer structure and mixed valence state of nickel. The properties at ambient pressure contain crucial information of the fundamental interactions and bosons mediating superconducting pairing. Here, using X-ray absorption spectroscopy and resonant inelastic X-ray scattering, we identified that Ni 3 , Ni 3 , and ligand oxygen 2p orbitals dominate the low-energy physics with a small charge-transfer energy.