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DPG

Berlin 2008 – scientific programme

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O: Fachverband Oberflächenphysik

O 50: Symposium: Surface Spectroscopy on Kondo Systems II (Invited Speakers: Jonathan Denlinger, Johann Kroha, Alexander Schneider)

O 50.4: Talk

Wednesday, February 27, 2008, 16:45–17:00, HE 101

Kondo Peak Splitting in a Magnetic Field for Ti/CuN/Cu(100)-c(2 × 2) — •Harald Brune1,2, Markus Ternes1, Christopher P. Lutz1, Cyrus F. Hirjibehedin1,3, and Andreas J. Heinrich11IBM Almaden Research Center — 2Ecole Polytechnique Fédérale de Lausanne — 3London Centre for Nanotechnology

dI/dV–spectra recorded with an STM operating at 0.6 K show a Kondo peak when the tip is centered over individual Ti atoms adsorbed onto the Cu sites of CuN-c(2 × 2)–islands on a Cu(100) surface. In the gas phase Ti has S = 1, however, the observed spectra are suggestive of S = 1/2. The peak is sufficiently narrow to observe its splitting under an out-of-plane magnetic field. We discuss the results in light of measurements of the d-state LDOS centered at 0.7 eV above EF.

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