Tuning the Thermal Spin Transport Properties via Redox Reactions and Force

Abstract

Spin caloritronic devices, multifunctional devices combining spintronics and caloritronic, are crucial for the sustainable development of humans. A novel spin caloritronic device is presented using anthraquinone-based molecular sandwiched among two semi-infinite zigzag graphene nanoribbons containing asymmetrical edge hydrogenation electrodes. We demonstrate that the temperature gradient between the right and the left electrodes can generate spin-up and spin-down currents flowing in opposite orientations. Besides, the mentioned currents possess approximately the same magnitudes, indicating a nearly nondissipative spin Seebeck effect. We also find that these currents are significantly dissimilar for the redox reactions and force at different temperature gradients, demonstrating that the developed system can provide acceptable switching action. The obtained results reflect that the redox reactions and force can control the spin Seebeck effect.