Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 13: Magnetic Surface Excitations
O 13.4: Vortrag
Montag, 7. März 2016, 16:00–16:15, S052
Reversible switching of the Kondo effect at a giant Rashba surface — •Jens Kügel, Andreas Krönlein, and Matthias Bode — Experimentelle Physik II, Würzburg, Germany
Transition metal phthalocyanine (TMPc) molecules on metal substrate have recently attracted considerable interest, as they offer a versatile platform to study and the tune magnetic interaction of the central metal ion with the substrate’s conduction electrons [1,2]. Especially the Kondo effect arising from unscreened magnetic moments of the metal ion has been intensively studied [3,4].
In this contribution we present a low-temperature (T = 5 K) scanning tunneling microscopy and spectroscopy (STS) study of single MnPc molecules adsorbed on BiAg2, a surface alloy which has been shown to exhibit a giant Rashba effect [5]. We will show that a STS feature close to the Fermi energy —most likely a signature of Kondo screening— can be reversible switched on and off by controlled manipulation with the STM tip.
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D. Rakhmilevitch et al., Phys. Rev. Lett. 113, 236603 (2014).
A. Strozecka et al., Phys. Rev. Lett. 109, 147202 (2012).
C. R. Ast et al., Phys. Rev. Lett. 98, 186807 (2007).