1 Department of Micro- and Nanotechnology, Technical University of Denmark2 Theoretical Nanoelectronics, Department of Micro- and Nanotechnology, Technical University of Denmark3 National Academy of Sciences of Ukraine4 Martin-Luther University5 Max Planck Institute6 Center for Nanostructured Graphene, Center, Technical University of Denmark
We present first-principles studies of the thermopower of the organometallic V4Bz5 molecule attached between Co electrodes with noncollinear magnetization directions. Different regimes in the formation of the noncollinear magnetic state of the molecule lead to a remarkable nonmonotonous dependence of the thermopower on the angle between the magnetizations of the electrodes. This complex behavior is explained by the resonant properties of the electron transmission. Consequently, the nanocontacts can be utilized for local heating or cooling controlled by the external magnetic field.
Physical Review B (condensed Matter and Materials Physics), 2013, Vol 88, Issue 8