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Highly-directional hyperbolic surface plasmons are widely exploited in optoelectronic devices, but obtaining the same performance in simpler platforms over metahyperbolic surfaces has technological advantages for integration. The authors predict that RuOCl2 monolayers exhibit low-loss hyperbolic responses across the THz to UV spectral range.
The recent discovery of superconductivity in the nickelates provides another angle to investigate this phenomenon in the high-Tc cuprates and hopefully help solve the mechanism of their unconventional superconductivity. Here, the authors report an increase in Tc for Pr0.8Sr0.2NiO2 where strain from the underlying LSAT substrate plays a possible role, supporting simulations also reveal the contributing role Ni and O orbitals hybridisation play in the unconventional pairing.
Changes in the underlying dynamics of an observed system manifest as deformation in the underlying attractor in phase space. We propose a method to construct a discretised network representation of the attractor and demonstrate its applicability in identifying dynamical change points in various theoretical and real systems.
Coherent microwave-to-optical conversion is crucial for networking physically separated quantum devices. This paper demonstrates coherent conversion of microwaves to a wide, tuneable optical frequency range using room-temperature Rb atoms, supporting frequency division multiplexing and coherent frequency channel control.
This paper theoretically predicts near-unity efficiency in converting a guided mode to free space radiation via a deep-subwavelength metallic hole. This phenomenon is enabled by a topologically protected one-way waveguide mode, where reciprocity is broken through an external magnetic field at terahertz frequencies.
Non-orthogonal quantum states cannot be perfectly distinguished - a fact of central importance in quantum mechanics, from both a fundamental and practical viewpoint. The authors introduce an approach to this problem, using entangled measurements to distinguish quantum states better than what is possible with direct measurements.
Platicon microcombs in the normal-dispersion regime exhibit asymmetric spectral features because it largely relies on asymmetric local dispersion anomalies. The authors demonstrate stable, power-efficient microcombs with high spectral symmetry by means of symmetrical dispersion engineering.
The conventional methods to break reciprocity in the microwaves involve bulky magnets and complex spatial-temporal modulation, impairing the development in modern compact electronic systems. To circumvent this problem, the authors realize a lightweight, integrable, and all-passive metasurface that enables nonreciprocal transmission.
Topological insulators are bulk insulators with conducting zero-energy edge states conventionally predicted by topological indices, such as winding numbers in one-dimensional lattices. Here, the authors use the Jackiw-Rebbi theory to reveal that the number of topologically protected zero-energy states can be higher than the winding number.
Environmental factors such as mechanical stresses govern the cellular behavior and physiology, but the role of selfinduced biomechanical stresses in growing bacterial colonies is still unclear. The authors reveal how the response to collective mechanical forces acting on the individual cells regulates the size of growing bacteria.
The mechanical response of polymer films is affected by size effects under nanoconfinement, but the mechanism of such response in terms of molecular configurations and chain conformations has proven elusive. The authors reveal the conformational origin of the stiffening behavior in crosslinked polymeric nanofilms via simulations and experiments.
The narrow escape theory (NET) predicts the escape time distribution of Brownian particles confined to a domain with reflecting borders except for one small window. We systematically tested the NET in a disc both experimentally as well as with stochastic numerical simulations and found excellent agreement with theory.
Optical frequency combs enable precise measurement of optical frequencies, but integrated setups require a delicate balance between high precision and low power consumption. The authors demonstrate a sub-kHz-frequency measurement scheme based on a fully stabilized electro-optic comb that enables the parallel measurement of multiple wavelengths.
The full-quantum propagation of molecular degrees of freedom is onerous even for the capability of noisy intermediate-scale quantum devices (NISQ), and methods to perform mixed quantum-classical dynamics on NISQ devices are at an early stage of development. The authors present a modular algorithm to perform mixed quantum-classical dynamics NISQ devices.
Magnetic skyrmions are topological excitations that have attracted great attention recently for their potential applications in low power, ultrahigh density memory. A major challenge has been to find materials that meet the dual requirement of small skyrmions stable at room temperature. Here, the authors further both these goals by developing epitaxial FeGe films with excess Fe using atomic layer molecular beam epitaxy far from thermal equilibrium.
The condensed-matter counterpart of the Poincaré group may consist of various spacetime symmetry groups of spacetime crystals. In this work, the authors report the theoretical foundation of the projective spacetime symmetry algebras, explicitly work them out in (1,1) dimensions and discuss their consequences over spacetime lattices with gauge fluxes.
The potential for discovery with ultrafast gas-phase diffraction experiments is limited as we often rely on advanced simulations to interpret results. The authors present a method that can expand this discovery potential by directly inverting diffraction patterns for approximate molecular structure probability distributions with a ~100X real-space resolution improvement.
The investigation of a chiral active fluid composed of a carpet of standing and spinning colloidal rods, combined with simulations for synchronously rotating hard discs in a hydrodynamic explicit solvent reveals here the simultaneous occurrence and relation of two seemingly separate phenomena: active turbulence and odd viscosity.
Doping is a tried and tested method to tune the properties of a range of quantum materials either by introducing defects into the system or engineering the charge carrier concentration. Here, the authors use photoemission spectroscopy to investigate the effects of surface doping of alkali metals on the Mott insulator Ca2RuO4, revealing an orbital-selective surface metal-insulator transition induced by the surface-dopant interaction.
