Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 74: Surface and Interface Magnetism II (O jointly with MA)

O 74.7: Talk

Thursday, April 3, 2014, 12:00–12:15, WIL C107

Scanning tunneling microscopy and spectroscopy of transition metal phthalocyanines on noble metal surfaces — •Jens Kügel, Jacob Senkpiel, Pin-Jui Hsu, and Matthias Bode — Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

Transition metal phthalocyanine (TM-Pc) molecules adsorbed on metal substrate have recently attracted considerable interest, as they offer a versatile platform to study magnetic interaction of the central metal ion with the substrate. Especially the Kondo effect, a collective interaction phenomena with the substrate, arising from unscreened magnetic moments of the metal ion, has been intensively studied [1,2]. In this contribution we present low-temperature (T = 5 K) scanning tunneling microscopy and spectroscopy data of CuPc and MnPc adsorbed on different noble metal substrates [Ag(001), Cu(001)]. The different molecular spectra will be compared and analyzed in terms of their electronic and magnetic properties. In particular we will focus on the Kondo effect and discuss how superimposed states can lead to misinterpretation of the Kondo temperature.

[1] E. Minamitani et al., Phys. Rev. Lett. 109, 086602 (2012).
A. Stróżecka et al., Phys. Rev. Lett. 109, 147202 (2012).