DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 41: Surface magnetism I

MA 41.11: Talk

Thursday, March 15, 2018, 12:15–12:30, EB 202

Tunneling anisotropic magnetoresistance via molecular π orbitals of Pb dimersJohannes Schöneberg1, Paolo Ferriani2, •Stefan Heinze2, Alexander Weismann1, and Richard Berndt11Institute of Experimental Physics, Christian-Albrechts-Universität zu Kiel, Germany — 2Institute of Theoretical Physics and Astrophysics, Christian-Albrechts-Universität zu Kiel, Germany

Tunneling anisotropic magnetoresistance (TAMR) [1,2] has been observed down to the single atom limit [3]. However, so far mostly 3d transition-metals with a considerable magnetic moment have been studied. Here, we demonstrate a large TAMR for individual Pb dimers on a ferromagnetic surface due to molecular π orbitals. Dimers oriented differently with respect to the magnetization directions of a ferromagnetic Fe double layer on W(110) were made with a scanning tunneling microscope. Depending on the dimer orientations, TAMR is absent or as large as 20% at the Fermi level. General arguments and first-principles calculations show that mixing of molecular orbitals due to spin-orbit coupling, which leads to TAMR, is maximal when the magnetization is oriented parallel to the dimer axis.

M. Bode et al., Phys. Rev. Lett. 89, 237205 (2002).
C. Gould et al., Phys. Rev. Lett. 93, 117203 (2004).
N. Néel et al., Phys. Rev. Lett. 110, 037202 (2013).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin