The effect of Coulomb repulsion on Seebeck coefficient of NiCl2 monolayer

The Seebeck effect of NiCl2 has been explored by using first-principles calculations under the LDA+U to include the Coulomb repulsion. The exploration was conducted for two cases, namely, close to the critical temperature and room temperature. We found the slight difference of the peaks of Seebeck coefficients, i.e., the highest peak has been observed near the critical temperature. As the Coulomb repulsion was considered, the peak was shifted both two cases. It suggested that the Seebeck effect was influenced by the Coulomb repulsion.