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.

Simple, reversible gradient Seebeck coefficient measurement system for 300-600 K with COMSOL simulations.

Seebeck measurement is a crucial step for characterizing thermoelectric samples, as measuring the accurate value with a simpler system design is challenging. Here, we report a simple design of the Seebeck coefficient measurement system, which can measure the thermo-emf (Seebeck coefficient) of the sample, under a limited temperature range of 300-600 K. Unlike the majority of the reported instrumental designs, the system does not have a hot walled chamber.