Thermoelectric effect in a graphene sheet connected to ferromagnetic leads

摘要: We theoretically investigate the thermoelectric property of a graphene sheet coupled to two ferromagnetic electrodes with noncollinear magnetic moments. By using nonequilibrium Green's function combining tight-binding Hamiltonian, it is demonstrated that thermopower weakly depends on polarization strength as well configuration leads. On contrary, electronic contribution thermal conductance sensitive both and relative alignment magnetization directions. Furthermore, shows linear dependence temperature an inverse Fermi energy in graphene, which agrees recent experimental measurements.