Low Temperature Physics: 39, 189 (2013); https://doi.org/10.1063/1.4795171 (10 pages)
Физика Низких Температур: Том 39, Выпуск 3 (Март 2013), c. 249-260    ( к оглавлению , назад )

New directions in point-contact spectroscopy based on scanning tunneling microscopy techniques (Review Article)

E. Tartaglini1, T.G.A. Verhagen1, F. Galli1, M.L. Trouwborst1, R. Müller2, T. Shiota3, J. Aarts1, and J.M. van Ruitenbeek1

1Kamerlingh Onnes Laboratorium, Universiteit Leiden, PO Box 9504, 2300 RA Leiden, The Netherlands
E-mail: aarts@physics.leidenuniv.nl

2University of Konstanz, FB Physik, 10 Universitätstrasse, D-78457 Konstanz, Germany

3Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-S7-14, Ookayama, Meguro-ku, Tokyo 152-8552, Japan

Received November 5, 2012


Igor Yanson showed 38 years ago for the first time a point-contact measurement where he probed the energy resolved spectroscopy of the electronic scattering inside the metal. Since this first measurement, the pointcontact spectroscopy (PCS) technique improved enormously. The application of the scanning probe microscopy (SPM) techniques in the late 1980s allowed achieving contacts with a diameter of a single atom. With the introduction of the mechanically controlled break junction technique, even spectroscopy on freely suspended chains of atoms could be performed. In this paper, we briefly review the current developments of PCS and show recent experiments in advanced scanning PCS based on SPM techniques. We describe some results obtained with both needle-anvil type of point contacts and scanning tunneling microscopy (STM). We also show our first attempt to lift up with a STM a chain of single gold atoms from a Au(110) surface.

PACS: 07.79.Fc Near-field scanning optical microscopes;
PACS: 87.80.Ek Mechanical and micromechanical techniques;
PACS: 37.10.De Atom cooling methods;
PACS: 37.10.Gh Atom traps and guides;
PACS: 73.23.Ad Ballistic transport.

Key words: scanning tunneling microscopes, single-molecule techniques, atom manipulation in atomic physics, ballistic transport.