Letters

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  • Multiferroics can possess multiple ferroic orders, for example, electric polarization and magnetism, and are of interest for new device applications. Here thermal control is shown to manipulate electric and magnetic orders in a single-phase quasi-two-dimensional halide perovskite.

    • Tong Zhu
    • Xue-Zeng Lu
    • Hiroshi Kageyama
    Letter
  • Plastic deformation requires the propagation of a kinked profile along dislocations. It is shown that each kink acts as a set of travelling thermal spikes, favouring the nucleation of supplementary kinks and long dislocation jumps that are observed experimentally.

    • Laurent Proville
    • Anshuman Choudhury
    Letter
  • Oxidation normally deteriorates the mechanical properties of metals. But it is now shown that the formation of a percolating oxide network in metallic glass nanotubes can result in an unprecedented superelasticity of 14% at room temperature.

    • Fucheng Li
    • Zhibo Zhang
    • Yong Yang
    Letter
  • The authors report subatomic precision in measuring the displacement of a nanowire. Such precision is achieved by employing deep-learning enabled analysis of single-shot scattering of topologically structured superoscillatory illumination.

    • Tongjun Liu
    • Cheng-Hung Chi
    • Nikolay I. Zheludev
    LetterOpen Access
  • Using direct laser writing with a nanosecond pulsed laser operating at above-bandgap photon energies, we demonstrate the selective formation of spin defects in photonic crystal cavities in 4H-silicon carbide and their in situ characterization.

    • Aaron M. Day
    • Jonathan R. Dietz
    • Evelyn L. Hu
    Letter
  • Understanding lithium dynamics in solid-state electrolytes used for Li-ion batteries can be challenging. Using nonlinear extreme-ultraviolet spectroscopies, a direct spectral signature of surface lithium ions showing a distinct blueshift relative to the bulk absorption spectra is observed in a prototypical solid-state electrolyte.

    • Clarisse Woodahl
    • Sasawat Jamnuch
    • Michael Zuerch
    LetterOpen Access
  • We report compact spin-valley-locked perovskite emitting metasurfaces where spin-dependent geometric phases are imparted into bound states in the continuum via Brillouin zone folding, simultaneously enabling chiral purity, directionality and large emission angles.

    • Yang Chen
    • Jiangang Feng
    • Cheng-Wei Qiu
    Letter
  • Employing an oxidation-activated charge transfer strategy to oxidize transition-metal dichalcogenides into transition-metal oxides, the authors imprint plasmonic cavities with laterally abrupt doping profiles and nanoscale precision demonstrating plasmonic whispering-gallery resonators.

    • Brian S. Y. Kim
    • Aaron J. Sternbach
    • D. N. Basov
    Letter
  • We report the observation of narrowband terahertz emission from a quasi-one-dimensional charge-density-wave insulator, (TaSe4)2I. The origin of the emitted radiation is interpreted as a phason that obtains mass due to the long-range Coulomb interaction.

    • Soyeun Kim
    • Yinchuan Lv
    • Fahad Mahmood
    Letter
  • Cubic materials such as GeTe have low lattice thermal conductivity, thought to arise from a non-cubic local structural transition. Here, using a variable-shutter pair distribution function method, the average structure is shown to be crystalline but with anisotropic dynamics at higher temperatures.

    • Simon A. J. Kimber
    • Jiayong Zhang
    • Simon J. L. Billinge
    LetterOpen Access
  • The realization of strongly correlated bosons in a solid-state lattice is challenging. Here, the authors trap interlayer excitons in an angle-aligned WS2/bilayer WSe2/WS2 multilayer moiré lattice and observe correlated insulating states.

    • Yihang Zeng
    • Zhengchao Xia
    • Kin Fai Mak
    Letter
  • Both bosonic and fermionic collective states can emerge in two-dimensional semiconductor lattices, and mixing these species can further expand the landscape of quantum phases. Here, the authors report Bose–Fermi mixtures of neutral and charged excitons and the emergence of dual-density waves in an electrostatic lattice in a GaAs bilayer.

    • Camille Lagoin
    • Stephan Suffit
    • François Dubin
    Letter