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Phys. Rev. B 69, 125401 (2004) [10 pages]

Chains of gold atoms with tailored electronic states

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J. N. Crain1, J. L. McChesney1, Fan Zheng1, M. C. Gallagher2, P. C. Snijders3, M. Bissen4, C. Gundelach4, S. C. Erwin5, and F. J. Himpsel1
1Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA
2Department of Physics, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
3Department of NanoScience, Delft University of Technology, Lorentzweg, 2628 CJ Delft, The Netherlands
4Synchrotron Radiation Center, University of Wisconsin-Madison, 3731 Schneider Drive, Stoughton, Wisconsin 53589, USA
5Center for Computational Materials Science, Naval Research Laboratory, Washington, DC 20375, USA

Received 11 August 2003; published 5 March 2004

A combination of angle-resolved photoemission and scanning tunneling microscopy is used to explore the possibilities for tailoring the electronic structure of gold atom chains on silicon surfaces. It is shown that the interchain coupling and the band filling can be adjusted systematically by varying the step spacing via the tilt angle from Si(111). Planes with odd Miller indices are stabilized by chains of gold atoms. Metallic bands and Fermi surfaces are observed. These findings suggest that atomic chains at stepped semiconductor substrates make a highly flexible class of solids approaching the one-dimensional limit.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.125401
DOI:
10.1103/PhysRevB.69.125401
PACS:
73.20.At, 71.10.Pm, 79.60.Jv, 81.07.Vb
 
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