Probing electron-phonon and phonon-phonon coupling in type-II Dirac semi-metal NiTevia temperature-dependent Raman spectroscopy.

We report the temperature-dependent structural characterization of type-II Dirac semimetal NiTein the form of a bulk single crystal and a nanoflake (200 nm thick). Detailed x-ray diffraction study along with Rietveld refinement analysis reveals superior crystallinity and linear thermal expansion coefficient () of 5.56 × 10and 22.