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Hole Polaronic Confinement in (111) Yttria-Stabilised Zirconia

: Yttria-stabilized zirconia (YSZ) is the benchmark oxygen-ion conductor and is widely regarded as electronically inert under oxidizing conditions. Yet its electrical behavior at the nanoscale remains unsettled. While bulk YSZ exhibits predominantly ionic transport, electronic contributions have only been reported under highly defective, porous, or strong-field conditions. Here, we demonstrate that ultrathin epitaxial YSZ films (<20 nm) exhibit measurable p-type mixed conduction at ro...

Discovery of magnetic-field-tunable density modulations and spin tilting in a layered altermagnet

Altermagnets recently emerged as a new class of magnetic materials, arising from specific spin crystal symmetries. They exhibit a spin-polarized electronic band structure similar to ferromagnets, yet possess zero net magnetization, promising exotic properties. Here we study a layered triangular lattice altermagnet, cobalt-intercalated NbSe2 using scanning tunneling microscopy and spectroscopy (STM/S). Spectroscopic-imaging STM and spin-polarized STM reveals emergent 2a0 tri-directional charge...

Phase engineering in NaNbO3 thin films fabricated by PLD: Strain, substrate and temperature role on the Q FE – P AFE phase transition

This study explores precise control over ferroelectric (Q) and antiferroelectric (P) phase transitions in NaNbO3 (NNO) thin films, essential for sustainable electronic applications. Epitaxial NNO layers (10–290 nm) were grown via Pulsed Laser Deposition (PLD) onto SrTiO3 (001) and NdGaO3 (110)/(101). X-ray diffraction and reciprocal-space mapping show films deposited at 600 °C nucleate as a fully strained Q phase; beyond a thickness of about 45 nm on NdGaO3, they relax into the P phase. Eleva...

Quantifying fast structural relaxations in oxide V2O3 thin films

: Vanadium sesquioxide (V2O3) attracts considerable interest due to its high technological potential in many devices for resistive switching, energy storage, catalysis, etc. To harness the full potential of these materials in functional devices, it is crucial to understand the dynamics of the structural relaxation process exhibited when grown in thin film form. Here, we present a comprehensive study on the fast-structural relaxation phenomenon observed in V2O3 thin films grown by the pulsed l...

Monovalent ions aid catalysis of two-metal-ion dependent RNA editors

The cleavage and formation of phosphodiester bonds in nucleic acids is performed by diverse cellular machineries ranging from small protein enzymes to large complexes composed of proteins and/or RNA strands. While it has long been believed that these processes depend solely on a two-metal-ion mechanism, comparative structural analyses revealed that some complexes also contain highly conserved second-shell monovalent cations. The two-Mg2+-aided catalytic mechanism, in which both ions function ...

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