| Abstract Scope |
Thermomagnetic materials use the Nernst coefficient to convert thermal energy into electricity. 2D layered semimetallic materials are advantageous for this purpose due to their large carrier mobility, small cross-plane thermal conductivity, bipolar conduction, and large transport anisotropy. In this talk, I will discuss our recent Nernst measurements in 2D layered semimetals, namely, Bi2Te3, NbSe2, and MoxW1-xTe2 single crystals and thin-films. I will also discuss our progress in the theoretical understanding of the Nernst signal from first-principles calculations. In general, we observed that samples with larger mobilities also own a larger Nernst coefficient. The Nernst signal shows nonlinear behavior at moderate magnetic field and increases at lower temperatures where the Seebeck coefficient tends to be very small. |