DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2013 – scientific programme

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

O: Fachverband Oberflächenphysik

O 71: Surface Magnetism (jointly with MA)

O 71.3: Talk

Thursday, March 14, 2013, 15:45–16:00, H3

Parity effect in ground state localization of antiferromagnetic chains coupled to a ferromagnetSimon Holzberger1, Tobias Schuh1, Samir Lounis2, Stefan Blügel2, and •Wulf Wulfhekel11Physikalisches Institut, KIT — 2Peter Grünberg Institut, Forschungszentrum Jülich

We investigate the ground states of antiferromagnetic Mn nanochains on Ni(110) by spin-polarized scanning tunneling microscopy in combination with theory. While the ferrimagnetic linear trimer experimentally shows the predicted collinear classical ground state, no magnetic contrast was observed for dimers and tetramers where non-collinear structures were expected based on ab-initio theory. This striking observation can be explained by zero-point energy motion for even numbered chains derived within a classical equation of motion leading to non classical ground states. Thus, depending on the parity of the chain length, the system shows a classical or a quantum behavior.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2013 > Regensburg