Transition metal oxides, with their wide range of electronic and magnetic properties, offer a remarkable platform for developing future electronics based on unconventional quantum phenomena, such as topological phases. The formation of topologically nontrivial states is linked to crystalline symmetry, spin-orbit coupling, and magnetic ordering. Here, by employing angle-resolved photoemission spectroscopy

We report a direct measurement of the temperature and density of a metal along its liquid-vapor coexistence (L-V) curve. By shocking platinum to a high-pressure liquid, we imparted sufficient heat for subsequent isentropic release to place it in a state on the boundary between the liquid and vapor phases. Released material in the liquid phase acted as a high velocity flyer pinned to the L-V curve.

The pressure evolution of RuO2 is studied using single-crystal x-ray diffraction in a diamond anvil cell, combined with band-structure calculations. The tetragonal rutile structure transforms into the orthorhombic CaCl2-type structure above 13 GPa under quasihydrostatic pressure conditions. This second-order transition is ferroelastic in nature and accompanied by tilts of the RuO6 octahedra. Orthorhombic

Together with EuGa4 and EuAl4, EuAl2Ga2 belongs to the BaAl4 structure type with space group I4/. EuAl2Ga2 develops an incommensurate charge density wave (CDW) at temperatures below TCDW=51K. On the basis of temperature-dependent single-crystal x-ray diffraction data, the incommensurately modulated CDW crystal structure of EuAl2Ga2 is determined to possess orthorhombic symmetry (0000)s0000. This symmetry

We calculate the magnetic phase diagram of the spin-1/2 nearest neighbor XXZ pyrochlore model using the pseudo-Majorana functional renormalization group in the temperature flow formalism. Our phase diagram as a function of temperature and coupling ratio, allowing both longitudinal and transverse couplings to be ferromagnetic and antiferromagnetic, reveals a large nonmagnetic regime at low temperatures

First-principles based molecular-dynamics simulations have been performed for binary CuxTi1−x (x = 0.31, 0.50, and 0.76) alloys to investigate the relationship between local structure and dynamical properties in the liquid and undercooled melt. The undercooled melts show a pronounced short-range order, majorly a fivefold symmetry (FFS) around the Cu atoms, which competes with bcc ordering. This complex

The spectral form factor (SFF) is a powerful diagnostic of random matrix behavior in quantum many-body systems. We introduce a family of random circuit ensembles whose SFFs can be computed . These ensembles describe the evolution of noninteracting fermions in the presence of correlated on-site potentials drawn from the eigenvalue distribution of a circular ensemble. For disorder parameters drawn from

The use of powerful numerical methods to study the optical properties of metasurfaces has led to an obvious need for the development of analytical models that provide meaningful physical analysis of the numerical results. In this paper, we present a general analytical approach to the study of electromagnetic resonances in metasurfaces consisting of meta-atoms with anisotropic dipole polarizabilities

The process by which magnetic moments switch directions is crucial for understanding the performance of magnetic storage materials and in biomedical applications such as magnetic particle imaging and magnetic hyperthermia. Here, we utilize the geodesic nudged elastic band method to identify the atomic-level minimum energy path for a field-free reorientation of magnetic moments in bulk magnetite and

Degenerate two-dimensional electron liquids are theoretically established to possess two vastly distinct collisional electron mean free paths, where even-parity deformations of the Fermi surface are hydrodynamic with a short collisional mean free path but odd-parity deformations remain near ballistic (known as the “tomographic” transport regime). Predicted signatures of this regime rely on the scaling

Intercalation is a robust approach for modulating the properties of epitaxial graphene on SiC and stabilizing two-dimensional intercalant layers at the graphene/SiC interface. In this paper, we present synchrotron-based angle resolved photoelectron spectroscopy (ARPES) measurements focusing on the band structure of intercalated Pb under a single layer of epitaxial graphene. The interlayer Pb exhibits

We introduce methods of characterizing entanglement on the example of the quantum skyrmion Hall effect, in which entanglement measures are enriched by the matrix representations of operators for observables. These observable operator matrix representations can enrich the partial trace over subsets of a system's degrees of freedom, yielding reduced density matrices useful in computing various measures

Topological antiferromagnetic systems, which exhibit anisotropic band structures combined with complex relativistic spin structures in momentum space, have shown strong magnetoresistance effects driven by Dirac fermion characteristics. While these new antiferromagnets have been studied in transport experiments, very little is known about their spin-dependent electronic dynamics on ultrafast timescales

Hydrides are famous for the possibility of reaching high-Tc superconductivity under high pressure within a conventional mechanism. Here we propose ternary nickel hydrides MNiH2 (M=Li, Na) as materials that mirror key aspects of unconventional superconducting cuprates and nickelates while presenting unique characteristics. Compared to Ni oxides, Ni-H bands are wider due to shorter bond lengths and show

We experimentally study the dispersion of localized acoustic surface waves (ASWs) supported by an array of coupled membrane-capped cavities. We design, simulate, and characterize a metasurface with a unit cell comprising a simple cylindrical air-filled cavity resonator topped with a tensioned membrane. We show that by tuning the resonance of constituent membrane or cavity, the behavior of the coupled

We investigate experimentally and theoretically the behavior of the confined dark exciton in an InAs/GaAs semiconductor quantum dot, under the application of an external magnetic field in a Voigt configuration. We show that by varying the magnitude and direction of the external field one can accurately control the dark-exciton fine-structure splitting. In addition, we show that the dark-exciton spin

The high pressure equation of state for the W0.75Re0.25 alloy is experimentally determined up to 183 GPa with synchrotron angle-dispersive powder x-ray diffraction in the diamond-anvil cell and to ∼925 GPa with density-functional theory. W-Re alloys are used in many industrial high-temperature applications and as a confining gasket material in high-pressure diamond-anvil cell research. The inclusion

Nonreciprocal spin-wave propagation in bilayer ferromagnetic systems has attracted significant attention due to its potential to precisely quantify material parameters as well as for applications in magnonic logic and information processing. In this paper, we investigate the nonreciprocity of spin-wave dispersions in heterostructures consisting of two distinct ferromagnetic materials, focusing on the

We utilize the topological holographic framework to characterize and gain insights into the nature of quantum critical points and gapless phases in fermionic quantum systems. Topological holography is a general framework that describes the generalized global symmetry and the symmetry charges of a local quantum system in terms of a slab of a topological order, termed as the symmetry topological field

X-ray diffraction study of black phosphorus (BP) shows forbidden reflections, which imply a broken inversion symmetry with atomic distortion in the orthorhombic lattice. The unexpected distortion occurs throughout the entire bulk crystal, rather than being confined to just the top-surface layer. Thus our observation suggests that this distortion is an intrinsic bulk property, in contrast to earlier

We show that the recently proposed Lebeda-Aschebrock-Kümmel (LAK) meta-generalized gradient approximation, the accuracy of which was previously established for atomization energies, bond lengths, and band gaps, also captures weak interactions near equilibrium without a dispersion correction. We discuss how this is achieved. Furthermore, we show that among the semilocal cost pure functionals, LAK is

We report on an experimental study of spin and valley blockade in two-electron bilayer graphene (BLG) double quantum dots (DQDs) and explore the limits set by asymmetric orbitals and electron-electron interactions. The results obtained from magnetotransport measurements on two-electron BLG DQDs, where the resonant tunneling transport involves both orbital symmetric and antisymmetric two-particle states

Ergodicity has been one of the fundamental concepts underpinning our understanding of thermalization in isolated systems since the first developments in classical statistical mechanics. Recently, a similar notion has been introduced for quantum systems, termed complete Hilbert space ergodicity (CHSE), in which the evolving quantum state explores all of the available Hilbert space. This contrasts with

Magnons have inspired potential applications in modern quantum technologies and hybrid quantum systems due to their intrinsic nonlinearity, nanoscale scalability, and a unique set of experimentally accessible parameters for manipulating their dispersion. Such magnon-based quantum technologies demand long decoherence times, millikelvin temperatures, and minimal dissipation. Due to its low magnetic damping

We construct the first integrable models based on the Haagerup fusion category H3. We introduce a Haagerup version of the anyonic spin chain and use the boost operator formalism to identify two integrable Hamiltonians of PXP type on this chain. The first of these is an analog of the golden chain; it has a topological symmetry based on H3 and satisfies the Temperley-Lieb algebra with parameter δ=(3+13)/2

We show that dynamics of the magnetization in ferromagnets can pump orbital angular momentum, a phenomenon we refer to as orbital pumping. This is the reciprocal phenomenon to orbital torque that induces magnetization dynamics by the orbital angular momentum in nonequilibrium. The orbital pumping is analogous to the spin pumping established in spintronics, but it requires spin-orbit coupling for the

We study the nonunitary dynamics of a class of quantum circuits based on stochastically measuring check operators of subsystem quantum error-correcting codes, such as the Bacon-Shor code and its various generalizations. Our focus is on how properties of the underlying code are imprinted onto the measurement-only dynamics. We find that in a large class of codes with nonlocal stabilizer generators, at

In-plane magnetization is induced by the Edelstein effect in a Rashba spin-orbit interaction system. However, out-of-plane magnetization is more useful for switching a ferromagnetic memory. We study analytically and numerically electric field induced magnetization in p-wave magnets with the aid of the Rashba interaction based on a simple two-band model. The out-of-plane magnetization is induced when

In van der Waals antiferromagnets, both magnetization and interlayer interactions are temperature dependent, and their combined effects significantly impact magnon dispersion. However, these effects remain largely unexplored. Here, we report the distinct temperature dependencies of the optical and acoustic magnon modes in a CrCl3 sample. We find that, below the Néel temperature, the optical mode softens

Circuit-based quantum devices rely on keeping electrons at millikelvin temperatures. Improved coherence and sensitivity as well as discovering new physical phenomena motivate pursuing ever lower electron temperatures, accessible using on-chip cooling techniques. Here we show that a two-dimensional electron gas (2DEG), with the sub-band populations manipulated using gate voltages, works as an on-chip

Magnetic vortices and skyrmions are typically characterized by distinct topological invariants. This paper presents a unified approach for the topological classification of these textures, encompassing isolated objects and configurations where skyrmions and vortices coexist. Using homotopy group analysis, we derive topological invariants that form the free Abelian group, Z×Z. We provide an explicit

Ultrafast magnetization dynamics driven by ultrashort pump lasers is typically explained by changes in the electronic populations and scattering pathways of excited conduction electrons. This conventional approach overlooks the fundamental role of quantum mechanical selection rules, governing transitions from the core states to the conduction band, that form the key method of the probing step in these

Motivated by the recent appearance of the trillium lattice in the search for materials hosting spin liquids, we study the ground state of the classical Heisenberg model on its line graph, the trilline lattice. We find that this network realizes the recently proposed notion of a fragile spin liquid in three dimensions. Additionally, we analyze the Ising case and argue for a possible Z2 quantum spin

The discovery of the kagome metal CsV3Sb5 sparked broad interest, due to the coexistence of a charge density wave (CDW) phase and possible unconventional superconductivity in the material. In this Letter, we use low-energy electron diffraction (LEED) with a µm-sized electron beam to explore the periodic lattice distortion at the antimony-terminated surface in the CDW phase. We recorded high-quality

We study surface states and domain wall bound states in altermagnets using a rutile-lattice tight-binding model of electrons coupled to a Néel order. We discover that two symmetry-protected Weyl nodal lines in the bulk band structure can give rise to unconventional antichiral surface states—surface states from opposite surfaces propagate in a manner, as opposed to the antiparallel manner for the more

The finite parts of a large, locally interacting many-body system prepared out of equilibrium eventually equilibrate. Characterizing the underlying mechanisms of this process and its timescales, however, is particularly hard as it requires one to decouple universal features from observable-specific ones. Recently, additional insight was gained by studying how certain symmetries of the dynamics that

To gain deeper insight into the complex, stable, and robust configurations of magnetic textures, topological characterization has proven essential. In particular, while the skyrmion number is a well-established topological invariant for two-dimensional magnetic textures, the Hopf index serves as a key topological descriptor for three-dimensional magnetic structures. In this paper, we present and compare

Searching for highly coherent degrees of freedom in noisy solid-state environments is a major challenge in condensed matter. In disordered dipolar systems, such as magnetically doped insulators, compact clusters of two-level systems (TLS) have recently been shown to have significantly longer coherence times than typical single TLS. Coupling weakly to their environment, they sense and probe its many-body

Selenium is an elemental semiconductor with a wide band gap suitable for a range of optoelectronic and solar energy conversion technologies. However, developing such applications requires an in-depth understanding of the fundamental material properties. Here, we study the properties of the majority and minority charge carriers in selenium using a recently developed carrier-resolved photo-Hall technique

The electronic structure of metallic Bi2Ir2O7 has been investigated by a combination of soft x-ray absorption spectroscopy, x-ray emission spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS) in the vicinity of the oxygen K edge. The O K-edge RIXS spectra are found to resemble the O K-edge XES spectra with resonating features but with an absence of any Raman modes, revealing the highly

In the past decade, photoemission orbital tomography (POT) has evolved into a powerful tool to investigate the electronic structure of organic molecules adsorbed on surfaces. Here we show that POT allows for the comprehensive experimental identification of all molecular orbitals in a substantial binding energy range of more than 10 eV. Making use of the angular distribution of photoelectrons as a function

We investigate the pressure-temperature (p−T) phase diagram of elemental lithium (Li) up to multiterapascal (TPa) pressures using random structure search (AIRSS) and density functional theory (DFT). At zero temperature, beyond the high-pressure Fd3¯m diamond structure already predicted in previous studies, we find 11 solid-state phase transitions to structures of greatly varying complexity. The full

The divacancies in 4H-SiC attract significant attention for use as qubits owing to their spin and photoluminescence (PL) properties and near telecom PL emission. Nevertheless, there exist some ambiguities in the interpretation of their optically detected magnetic resonance (ODMR) spectra, especially at elevated temperatures. In this study, we investigate the divacancy configurations PL1–PL7 using PL

The chiral Luttinger liquid develops quantum chaos as soon as a—however slight—nonlinear dispersion is introduced for the microscopic electronic degrees of freedom. For this nonlinear version of the model, we identify an infinite family of translation-invariant interaction potentials with corresponding modulated symmetries. These symmetries are highly unconventional: they are modulated in momentum

We study a certain type of anomalous Hall current in magnetically and electrically biased bulk GaAs samples under the formation of Landau levels. The currents are generated by ultrafast optical excitation of spin-polarized carriers and detected by time-resolved measurements of the simultaneously emitted terahertz (THz) radiation. Due to the requirements of simultaneous magnetic and electric driving

We examine the bulk electronic structure of Nd3Ni2O7 using Ni 2p core-level hard x-ray photoemission spectroscopy combined with density functional theory + dynamical mean-field theory. Our results reveal a large deviation of the Ni 3d occupation from the formal Ni2.5+ valency, highlighting the importance of the charge transfer from oxygen ligands. We find that the dominant d8 configuration is accompanied

Hall field induced resistance oscillations (HIROs) are studied in two-dimensional electron gases with resistivities dominated by scattering at identical but randomly distributed circular obstacles with hard walls. For sufficiently high number densities, these obstacles dominate the HIROs, even though they remain sparse in comparison to the intrinsic scatterers. With increasing obstacle density, we

We study operator dynamics in many-body quantum systems, focusing on generic features of systems that are ergodic, spatially extended, and lack conserved densities. Quantum circuits of various types provide simple models for such systems. We focus on Floquet quantum circuits, comparing their behavior with what has been found previously for circuits that are random in time. Floquet circuits, which have

A time interface (a rapid change of the constitutive parameters of a material in time), applied within an unbounded medium where a wave travels, can enable frequency conversion and is considered the temporal analog of a spatial interface between two materials. Here, we study light-matter interactions in four dimensions, 4D (space, and time, t), by exploring the implications of applying time interfaces

Ho3ScO6 harbors a frustrated maple leaf lattice (MLL). It crystalizes in the Mg3TeO6-type structure and has a centrosymmetric trigonal space group (R3¯). This system contains stacked layers of magnetic rings along the c axis consisting of six magnetic Ho3+ ions forming Ho hexagons, which are connected into a two-dimensional network by equilateral and isosceles triangles to form a rare example of a

We report a molecular dynamics study of quality of the ferroelectric phase transition in crystalline PbTiO3. We model anharmonicity accurately in terms of potential energy and polarization surfaces trained on density functional theory data with modern machine learning techniques. Our simulations demonstrate that the transition has a strong order-disorder character, in agreement with diffraction experiments

We develop an analytical approach to the spectral form factor and out-of-time ordered correlators in zero-dimensional Brownian models of quantum chaos. The approach expresses these spectral correlations as part of a closed hierarchy of differential equations that can be formulated for all system sizes and in each of the three standard symmetry classes (unitary, orthogonal, and symplectic, as determined

The influence of Coulomb interaction on the relaxation of the spin distribution function over the directions of electron momenta is studied by calculating the angular harmonics of the linearized electron-electron collision integral at low temperatures, when the electron gas is degenerate. It is shown that the relaxation rates of the spin distribution function of two-dimensional electron gas are substantially

While the periodic equation-of-motion coupled-cluster (EOM-CC) method promises systematic improvement of electronic band gap calculations in solids, its practical application at the singles and doubles level (EOM-CCSD) is hindered by severe finite-size errors in feasible simulation cells. We present a hybrid approach combining EOM-CCSD with the computationally less demanding GW approximation to estimate

A prominent feature of d-wave altermagnets is the pure spin current generated in the absence of spin-orbit interactions. In the context of symmetry, there are s-wave, p-wave, d-wave, f-wave, g-wave, and i-wave magnets. In this paper, making an analytic study of two-band Hamiltonian systems coupled with electrons, we demonstrate unexpectedly that only the ℓth order nonlinear transverse spin current

We report a comprehensive study of the uniaxial stress response of charge density wave (CDW) correlations in detwinned single crystals of the high-temperature superconductor YBa2Cu3O6+x (YBCO6+x) with 0.40≤x≤0.93 (hole-doping levels 0.072≤p≤0.168) by means of Cu L3-edge resonant energy-integrated x-ray scattering (REXS). We show that the influence of uniaxial stress is strongly doping dependent: the

Exactly solvable models in quantum many-body dynamics provide valuable insights into many interesting physical phenomena and serve as platforms for rigorously investigating fundamental theoretical questions. Nevertheless, they are extremely rare and existing solvable models and solution techniques have serious limitations. In this paper, we present a family of exactly solvable unitary circuits that

We present extensive new path integral Monte Carlo (PIMC) simulation results for the chemical potential of the warm dense uniform electron gas (UEG), spanning a broad range of densities and temperatures. This is achieved by following two independent routes, (i) based on the direct estimation of the free energy [Dornheim , ] and (ii) using a histogram estimator in PIMC simulations with a varying number

We investigate the magnetic characteristics and tunneling signatures of a planar Josephson junction with Rashba spin-orbit coupling during the fusion of two Majorana vortices. By employing the topological phase diagram and conducting tight-binding simulations of the proposed device, we demonstrate that this fusion process induces a parity-dependent magnetic moment aligned with the junction axis. We

We uncover a high-field magnetic phase in i-MAX compounds exhibiting a canted antiferromagnetic order with unprecedented properties, revealed through NMR and AC susceptibility. Intriguingly, as the atomic number of rare earth increases, the transition field of this canted antiferromagnetic phase grows at the expense of the lower-field antiferromagnetic state. Our findings point to the complexity of