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 Karl Franzens University Graz

Graz University of Technology 

Spectroscopic manifestations of low-dimensional Physics: A local view
Wolf-Dieter Schneider
Laboratory of Surface Physics, EPFL Lausanne
17:00 - 18:00 Tuesday 23 June 2009 KFU HS 05.01

The interest in nanostructured materials, consisting of building blocks of a small number of atoms or molecules, arises from their promising new optic, catalytic, magnetic and electronic poperties, which are fundamentally different from their macroscopic bulk counterparts: small is different. Here we present selected examples from our laboratory, which elucidate local aspects of physics in low dimensions investigated by low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS): electronic properties (electron confinement, supraconductivity) of ultrathin supported metal islands [1], self-assembly, melting and electronic structure of two-dimensional adatom superlattices stabilized by long-range electronic interactions [2-5], two-dimensional supramolecular self-assembly, chirality, and electronic structure of small organic molecules [6-9], inelastic tunneling processes leading to vibrational excitations of supported molecules[10] and to local fluorescence and phosphorescence [11-13] enabling chemical recognition at the molecular scale.

[1] C. Brun, I.-P. Hong, F. Patthey, I. Yu. Sklyadneva, R. Heid, P. M. Echenique, K. P. Bohnen, E. V. Chulkov,

and W.-D. Schneider, Phys. Rev. Lett. 102, 207002 (2009).

[2] F. Silly, M. Pivetta, M. Ternes, F. Patthey, J. P. Pelz, and W.-D. Schneider, Phys. Rev. Lett. 92, 016101 (2004).

[3] M. Ternes, C. Weber, M. Pivetta, F. Patthey, J. P. Pelz, T. Giamarchi, F. Mila, and W.-D. Schneider,

Phys. Rev. Lett. 93, 146805 (2004).

[4] F. Silly , M. Pivetta, M. Ternes, F. Patthey, J. P. Pelz, and W.-D. Schneider, New J. Phys. 6, 16 (2004).

[5] N. N. Negulyaev, V. S. Stepanyuk, L. Niebergall, P. Bruno, M. Pivetta, M. Ternes,

F. Patthey, and W.-D. Schneider, Phys. Rev. Lett.. (2009), accepted.

[6] M.-C. Blüm, E. Cavar, M. Pivetta, F. Patthey, W.-D. Schneider, Angew. Chem. Int. Ed. 44, 5334 (2005).

[7] M.-C. Blüm, M. Pivetta, F. Patthey, and W.-D. Schneider, Phys. Rev. B 73, 195409 (2006).

[8] M. Pivetta, M.-C. Blüm, F. Patthey, and W.-D. Schneider, Angew. Chem. Int. Ed. 47, 1076 (2008).

[9] M. Pivetta, M.-C. Blüm, F. Patthey, and W.-D. Schneider, J. Chem. Phys. B 113, 4578 (2009).

[10] M. Pivetta, M. Ternes, F. Patthey, and W.-D. Schneider, Phys. Rev. Lett. 99, 126104 (2007).

[11] R. Berndt, R. Gaisch, J.K. Gimzewski, B. Reihl, R.R. Schlittler, W.-D. Schneider,M. Tschudy, Science 262, 1425 (1993).

[12] E. Cavar, M.-C. Blüm, M. Pivetta, F. Patthey, M. Chergui, and W.-D. Schneider, Phys. Rev. Lett. 95, 196102 (2005).

[13] F. Rossel, M. Pivetta, F. Patthey, and W.-D. Schneider, Optics Express 17, 2714 (2009).