Extended Strange Metal Phase in Electron-Doped LaCeCuO.

Landau's Fermi liquid theory offers a profound understanding of conduction electrons in metals. However, many strongly correlated materials, including heavy-fermions, cuprates, iron-based superconductors, and nickelates, exhibit non-Fermi liquid (NFL) behavior. A hallmark is the strange metal state, characterized by linear-in-temperature resistivity and a linear-in-energy single-particle decay rate.

Se-mediated dry transfer of wafer-scale 2D semiconductors for advanced electronics.

Two-dimensional (2D) semiconductors hold a great promise for next-generation electronics. Yet, achieving a clean and intact transfer of 2D films on device-compatible substrates remains a critical challenge. Here, we report an approach that uses selenium (Se) as the intermediate layer to facilitate the transfer of wafer-scale molybdenum disulfide (MoS) monolayers on target substrates with high surface/interface cleanness and structural integrity.

First- and Second-Order Topological States in Two-Dimensional Noncovalent Molecular Chiral Crystals.

Topological band physics has been extensively investigated in inorganic solid-state materials with a bonding structure. While covalent organic frameworks or metal-organic frameworks have garnered significant research interest, the high-order topological states in two-dimensional noncovalent molecular crystals remain largely uncharted. Here we investigated noncovalent molecular chiral crystals assembled from achiral molecules using first-principles calculations and tight-binding model analysis.

Structure and transport mechanism of human riboflavin transporters.

Riboflavin (vitamin B2) is the precursor of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which act as key cofactors of many enzymes, thus has essential roles in cell growth and functions. Animals cannot synthesize riboflavin in situ, the intake, distribution and metabolism of which are mediated by three riboflavin transporters (RFVT1-3). Many mutations in RFVTs cause severe consequences.

Ferromagnetism in LaFeO/LaNiO superlattices with high Curie temperature.

Interfacing complex oxides in atomically engineered layered structures can give rise to a wealth of exceptional electronic and magnetic properties that surpass those of the individual building blocks. Herein, we demonstrate a ferromagnetic spin order with a high Curie temperature of 608 K in superlattices consisting of otherwise paramagnetic perovskite LaNiO (LNO) and antiferromagnetic LaFeO (LFO). The ferromagnetism likely results from the covalent exchange due to interfacial charge transfer from Fe to Ni cations.

Chemically active wetting.

Wetting of liquid droplets on passive surfaces is ubiquitous in our daily lives, and the governing physical laws are well understood. When surfaces become active, however, the governing laws of wetting remain elusive. Here, we propose chemically active wetting as a class of active systems where the surface is active due to a binding process that is maintained away from equilibrium.

Ferromagnetism and correlated insulating states in monolayer MoTe.

Although the kagome model is fundamentally two-dimensional, the essential kagome physics, i.e., the kagome-bands-driven emergent electronic states, has yet to be explored in the monolayer limit.

Deteriorated Interlayer Coupling in Twisted Bilayer Cobaltites.

A wealth of remarkable behaviors is observed at the interfaces between magnetic oxides due to the coexistence of Coulomb repulsion and interatomic exchange interactions. While previous research has focused on bonded oxide heterointerfaces, studies on magnetism in van der Waals interfaces remain rare. In this study, we stacked two freestanding cobaltites with precisely controlled twist angles.

Magnetotransport evidence for the coexistence of two-dimensional superconductivity and ferromagnetism at (111)-oriented a-CaZrO/KTaO interfaces.

Exploring the intricate interplay between magnetism and superconductivity is crucial for unveiling the underlying mechanisms of unconventional superconductivity. Here, we report on the magnetotransport evidence for the coexistence of a two-dimensional (2D) superconducting state and a 2D ferromagnetic state at the interface between amorphous CaZrO film and (111)-oriented KTaO single crystal. Remarkably, the fingerprint of ferromagnetism, i.

Transport of Volatiles in Agglutinates from Lunar Regolith of Chang'e-5 Mission.

Agglutinate particles, an important component resulting from micrometeoroids impacts, account for about 13.4% to 84.7% of the volume of lunar regolith depending on its maturity.

Hatsugai-Kohmoto models: exactly solvable playground for Mottness and non-Fermi liquid.

This pedagogic review aims to give a gentle introduction to an exactly solvable model, the Hatsugai-Kohmoto (HK) model, which has infinite-ranged interaction but conserves the center of mass. Although this model is invented in 1992, intensive studies on its properties ranging from unconventional superconductivity, topological ordered states to non-Fermi liquid behaviors are made since 2020. We focus on its emergent non-Fermi liquid behavior and provide discussion on its thermodynamics, single-particle and two-particle correlation functions.

Observation of Rashba-Surface-Band-Dependent Yu-Shiba-Rusinov States in a Gold-Based Superconductor AuSn.

The interplay between the Rashba effect, superconductivity, and magnetism in gold-based superconductors provides a platform for exploring topological superconductivity, yet the interaction between Rashba bands and superconducting bound states remains unexplored. Here, we report Rashba-surface-band-dependent Yu-Shiba-Rusinov (YSR) states around Fe adatoms on the surfaces of AuSn, using ultralow temperature (5 mK) scanning tunneling microscope/spectroscopy. On Au-terminated surfaces with Rashba bands, most Fe atoms occupy Au vacancies, while only a few adsorb on the Sn-terminated surfaces with dominant bulk metallic states.

Orbital Angular Momentum Correlated Charge to Spin Conversion in Metallic Antiferromagnet.

Current-induced spin-orbit torque (SOT) allows efficient electrical manipulation on magnetization in spintronic devices. Maximizing the SOT efficiency is a key goal that is pursued via increasing the net spin generation and accumulation. However, spin transport in antiferromagnets is seriously restricted due to the strong antiferromagnetic coupling, which blocks the development of antiferromagnetic-based devices.

Manipulation of Antiferromagnetic Metal Phase in NdCeNiO by Epitaxial Strain.

Antiferromagnetic metals (AFMs) are potential candidates for spintronics application owing to their insensitivity to external magnetic perturbations. However, the scarcity of AFM in complex oxide presents a significant challenge in tuning their critical properties, thereby impeding the exploration of emergent phenomena and the advancement of practical applications. Quite recently, an AFM ground state is discovered in NdCeNiO, an oxide whose undoped parent counterpart exhibits metal-insulator transition dependent on temperature.

Ground State of the S=1/2 Heisenberg Spin Chain with Random Ferromagnetic and Antiferromagnetic Couplings.

We study the Heisenberg S=1/2 chain with random ferro- and antiferromagnetic couplings using quantum Monte Carlo simulations at ultra-low temperatures, converging to the ground state. Finite-size scaling of correlation functions and excitation gaps demonstrate an exotic critical state in qualitative agreement with previous strong-disorder renormalization group calculations but with scaling exponents depending on the coupling distribution. We find dual scaling regimes of the transverse correlations versus the distance, with an L independent form C(r)=r^{-μ} for r≪L and C(r,L)=L^{-η}f(r/L) for r/L>0, where μ>η and the scaling function is delivered by our analysis.

Realization of 2D metals at the ångström thickness limit.

Two-dimensional (2D) metals are appealing for many emergent phenomena and have recently attracted research interests. Unlike the widely studied 2D van der Waals (vdW) layered materials, 2D metals are extremely challenging to achieve, because they are thermodynamically unstable. Here we develop a vdW squeezing method to realize diverse 2D metals (including Bi, Ga, In, Sn and Pb) at the ångström thickness limit.

Emergent quantum Majorana metal from a chiral spin liquid.

We propose a mechanism to explain the emergence of an intermediate gapless spin liquid phase in the antiferromagnetic Kitaev model in an externally applied magnetic field, sandwiched between the well-known gapped chiral spin liquid and the gapped partially polarized phase. We propose that, in moderate fields, π-fluxes nucleate in the ground state and trap Majorana zero modes. As these fluxes proliferate with increasing field, the Majorana zero modes overlap creating an emergent quantum Majorana metallic state with a "Fermi surface" at zero energy.

Ordering of Interstitial Iron Atoms and Local Structural Distortion Induced by Iron Polycomplex in FeTeSe as Seen via Transmission Electron Microscopy.

The microscopic crystalline structure of materials is widely recognized as having a profound impact on their functional properties and application potential. Alterations to the lattice often provide distinctive opportunities to finely tune specific properties, particularly in strongly correlated systems. A paradigmatic case is the iron-based high-temperature superconductors, where the microstructure plays an important role in modulating superconductivity.

Size control and oscillations of active droplets in synthetic cells.

Oscillations in the formation and dissolution of molecular assemblies inside living cells are pivotal in orchestrating various cellular functions and processes. However, designing such rhythmic patterns in synthetic cells remains a challenge. Here, we demonstrate the spontaneous emergence of spatio-temporal oscillations in the number of droplets, size, and their spatial distribution within a synthetic cell.

Ferromagnetic Boundary States in the Hydrogenated Graphene/Nickel Moiré Superlattice.

Zigzag graphene nanoribbons (ZGNRs) exhibit spin-polarized edge states, which are key elements for designing graphene-based spintronics devices. The intrinsic ZGNRs have an antiferromagnetic ground state, which can be modified by edge engineering and external field. Here, this work proposes an avenue to realize the zigzag graphene/graphane nanoribbon superlattice (ZGNR-SL) on Ni(100) by selective hydrogenation of the 1D moiré patterns, based on the first-principles calculations.

Revealing the Orbital Origins of Exotic Electronic States with Ti Substitution in Kagome Superconductor CsV_{3}Sb_{5}.

The multiband kagome superconductor CsV_{3}Sb_{5} exhibits complex orbital textures on the Fermi surface, making the orbital origins of its cascade of correlated electronic states and superconductivity a major scientific puzzle. Chemical doping of the kagome plane can simultaneously tune the exotic states and the Fermi-surface orbital texture and thus offers a unique opportunity to correlate the given states with specific orbitals. In this Letter, by substituting V atoms with Ti in the kagome superconductor CsV_{3}Sb_{5}, we reveal the orbital origin of a cascade of its correlated electronic states through the orbital-resolved quasiparticle interference.

Symmetry Strategy for Rapid Discovery of Abundant Fractional Quantum Ferroelectrics.

Traditional ferroelectrics are limited by Neumann's principle, which confines exploration of ferroelectrics within polar point groups. Our recent work [Ji et al., Nat.

Proximity-Induced Superconductivity in Ferromagnetic FeGeTe and Josephson Tunneling through a van der Waals Heterojunction.

Synergy between superconductivity and ferromagnetism may offer great opportunities in nondissipative spintronics and topological quantum computing. Yet at the microscopic level, the exchange splitting of the electronic states responsible for ferromagnetism is inherently incompatible with the spin-singlet nature of conventional superconducting Cooper pairs. Here, we exploit the recently discovered van der Waals ferromagnets as enabling platforms with marvelous controllability to unravel the myth between ferromagnetism and superconductivity.

High Entropy: A General Strategy for Broadening the Operating Temperature of Magnetic Refrigeration.

Lattice distortion and disorder in the chemical environment of magnetic atoms within high-entropy compounds present intriguing issues in the modulation of magnetic functional compounds. However, the complexity inherent in high-entropy disordered systems has resulted in a relative scarcity of comprehensive investigations exploring the magnetic functional mechanisms of these alloys. Herein, we investigate the magnetocaloric effect (MCE) of the high-entropy intermetallic compound GdTbDyHoErCo.