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Showing 1–4 of 4 results
Advanced filters: Author: Amir-Abbas Haghighirad Clear advanced filters

  • A quantum critical point (QCP) describes a phase change independent of thermal fluctuations and instead can be driven by chemical or hydrostatic pressure. Here, the authors investigate by X-ray diffraction the evolution of the charge density wave in 2H-TaSe2 as a function of pressure and demonstrate how it is intertwined with a QCP and the superconducting phase of the system.

    • Yuliia Tymoshenko
    • Amir-Abbas Haghighirad
    • Frank Weber
    ResearchOpen Access
    Communications Physics
    Volume: 8, P: 1-9

  • The authors study the charge-density-wave (CDW) compound 2H-TaSe2 by inelastic x-ray scattering combined with photoemission spectroscopy. They find evidence for a precursor region above the CDW transition temperature, which is characterized by an overdamped phonon mode and is not detectable by photoemission.

    • Xingchen Shen
    • Rolf Heid
    • Frank Weber
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-10

  • Electronic nematicity is typically associated with the breaking of rotational symmetry. Here the authors report unusual nematicity in BaNi2As2, manifested in a large splitting of the optical phonon mode above the structural transition temperature, and link it to the coupling between the lattice and nematic fluctuations.

    • Yi Yao
    • Roland Willa
    • Matthieu Le Tacon
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9