Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 3: Scanning Probe Techniques: Method Development I

O 3.9: Vortrag

Montag, 20. März 2017, 12:30–12:45, TRE Phy

simultaneous high-resolution AFM/STM/IETS imaging of FePc on Au(111) . — •bruno de la torre1,2, martin svec1, radek zboril2, and pavel jelinek11Institute of Physics of the CAS, Prague, Czech Republic. — 2Regional Centre of Advanced Technologies and Materials, Palacký University, Olomouc, Czech Republic.

The recent progress in scanning probe microscopy provided unprecedented atomic resolution of single organic molecules on surfaces. Namely, the submolecular resolution was achieved in AFM [1], STM [2] and also IETS [3] mode employing functionalized tips. The origin of the submolecular contrast can be rationalized by a simple mechanical model introducing a lateral bending of a flexible tip apex [4,5]. However direct experimental evidence correlating the AFM/STM/IETS imaging mechanisms has been missing so far.

Here we present simultaneous high resolution AFM/STM/IETS imaging of iron(II) phthalocyanine (FePc) on Au(111) surface acquired with CO-functionalized probe. The acquired data demonstrate unambiguously the common imaging mechanism of the modes. We will show that not only renormalization of the frustrated translational mode [5], but also renormalization of the amplitude of IETS signal affect the IETS imaging.

[1] L. Gross et al., Science 325,1110 (2009). [2] C. Weiss et al., Phys. Rev. Lett. 105, 086103 (2010). [3] C.I. Chiang et al Science 344, 885 (2014). [4] P. Hapala et al., Phys. Rev. B 90, 085421 (2014). [5] P. Hapala et al., Phys. Rev. Lett. 113, 226101 (2014).

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