Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 112: Electronic structure: Surface magnetism and spin phenomena II
O 112.1: Vortrag
Freitag, 16. März 2018, 10:30–10:45, MA 042
Composite Kondo impurities created by assembly of entangled spin chains — •Sebastian Loth1,2,3, Deung-Jang Choi2,3,6, Roberto Robles4, Shichao Yan2,3, Jacob A. J. Burgess2,3, Steffen Rolf-Pissarczyk2,3, Jean-Pierre Gauyacq5, Nicolas Lorente6,7, and Markus Ternes3 — 1Universität Stuttgart, Institut für Funktionelle Materie und Quantentechnologien, Stuttgart — 2Max-Planck-Institut für Struktur und Dynamik der Materie, Hamburg — 3Max-Planck-Institut für Festkörperforschung, Stuttgart — 4The Barcelona Institute of Science and Technology, ICN2, Barcelona, Spain — 5Institut des Sciences Moleculaires d'Orsay, CNRS, Univ. Paris-Sud, Orsay Cedex, France — 6Centro de Fisica de Materiales, CFM/MPC, San Sebastian, Spain — 7Donostia International Physics Center, San Sebastian, Spain
We create spin chains in which a strongly correlated Kondo state emerges from antiferromagnetic coupling among the atoms of the chain [1]. We used a low-temperature scanning tunneling microscope to construct chains of Fe and Mn atoms on a copper nitride surface on Cu(100). Neither Fe nor Mn are Kondo-screened individually at the temperature of our experiment [2], but composite chains of Fe and Mn can become Kondo-screened. We find that significant inter-atomic entanglement of all magnetic atoms is a requirement for the emergence of the Kondo state. The resulting Kondo resonance is spatially distributed along the chain and can be modified by varying their composition, length and lattice constant. [1] D.J. Choi et al., Nano Lett. 17 6203 (2017). [2] C.F. Hirjibehedin et al., Science 317 1199 (2007).