VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Crystallization of polarons through charge and spin ordering transitions in ▫$1T-TaS_2$▫
    Božin, Emil S. ...
    The interaction of electrons with the lattice in metals can lead to reduction of their kinetic energy to the point where they may form heavy, dressed quasiparticles—polarons. Unfortunately, polaronic ... lattice distortions are difficult to distinguish from more conventional charge- and spin-ordering phenomena at low temperatures. Here we present a study of local symmetry breaking of the lattice structure on the picosecond timescale in the prototype layered dichalcogenide Mott insulator 1T-TaS2 using X-ray pair-distribution function measurements. We clearly identify symmetry-breaking polaronic lattice distortions at temperatures well above the ordered phases, and record the evolution of broken symmetry states from 915 K to 15 K. The data imply that charge ordering is driven by polaron crystallization into a Wigner crystal-like state, rather than Fermi surface nesting or conventional electron-phonon coupling. At intermediate temperatures the local lattice distortions are found to be consistent with a quantum spin liquid state.
    Vir: Nature communications [Elektronski vir]. - ISSN 2041-1723 (Vol. 14, article no. 7055, 2023, str. 1-9)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 170878979

    Povezava(-e):

    https://www.nature.com/articles/s41467-023-42631-6#Abs1
    DOI

Vnos na polico