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APS » Journals » Phys. Rev. Lett. » Volume 96 » Issue 15
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Phys. Rev. Lett. 96, 156401 (2006) [4 pages]

Quasicrystalline Electronic States of a One-Dimensionally Modulated Ag Film

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P. Moras1, W. Theis2, L. Ferrari1,*, S. Gardonio1, J. Fujii3, K. Horn4, and C. Carbone1
1Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
2Institut für Experimentalphysik, Freie Universität Berlin, Germany
3TASC, Istituto Nazionale di Fisica della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
4Fritz-Haber Institut der Max-Planck Gesellschaft, Berlin, Germany

Received 25 November 2005; published 17 April 2006

Ag films on GaAs(110) exhibit a one-dimensional quasiperiodic modulation, resulting in a Fibonacci sequence of parallel stripes with two different widths. Valence level photoemission shows that the Ag electronic states acquire a unique character along the quasiperiodic direction, distinctively manifested by a hierarchy of energy level replicas and avoided crossings at characteristic intervals in reciprocal space. These observations demonstrate the strong influence of the one-dimensional quasiperiodic potential on the Ag film states.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.156401
DOI:
10.1103/PhysRevLett.96.156401
PACS:
71.23.Ft, 61.44.Br, 73.21.Fg, 79.60.Dp

*Present address: Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Rome, Italy.

 
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