Theory of thermally driven spin-transport in spin-orbit coupled systems

• Applicant: Professor Jairo Sinova, Ph.D.
• Subject Area: Theoretical Condensed Matter Physics
• Term: from 2014 to 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 257819722

We propose a coordinated research program on the study of spin-dependent transport (quasi-particle spin and charge currents) and magnetic excitations (magnons) driven by thermal gradients and their associated non-equilibrium phonons. Our focus will be on hybrid systems (containing magnetic and non-magnetic components) and hetero-structure devices (tunneling devices) with spin-orbit coupling. We will combine theoretically single-particle, collective, and relativistic effects to i) establish a better microscopic understanding of the physics of transverse spin Seebeck effect; ii) explore the possibility of novel anisotropic magneto-thermal transport phenomena such as Anisotropic Tunneling Magneto-Seebeck effect; and iii) study the interaction of disorder, inelastic processes, and large thermal gradient effects (exploring the limits of linear response) on the transverse (Hall like) spin-currents and magnetic torques generated in response to thermal gradients at a large range of temperatures, including room temperature. To fully elucidate these physics and build confident predictive power, we will utilize and combine multiple complementary theory methodologies and approaches, some in collaboration with other teams in the SPP.

• DFG Programme: Priority Programmes
• Subproject of: SPP 1538: Spin Caloric Transport (SpinCaT)