Temperature bias-driven diode effect in a semiconductor quantum dot

A spin-dependent Seebeck diode is theoretically proposed, which consists of the junction with a semiconductor quantum dot sandwiched between the ferromagnetic and nonmagnetic leads. It is shown that both thermoelectric and thermal-spin currents driven by temperature bias exhibit asymmetric IC(S)−ΔT characteristics. In the Coulomb blockade regime, anomalous suppression of the thermoelectric (thermal-spin) current is observed at the forward...