Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 13: Magnetic Surface Excitations
O 13.4: Talk
Monday, March 7, 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.
[1] A. Zhao et al., Science 309, 1542 (2005).
J. Kügel et al., Phys. Rev. B 91, 235130 (2015).
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).