NOVEL SUPERSTRUCTURES OF ALKALI-DOPEDC60FILMS ONCu(111) ANDAg(111) SURFACES

C. C. Kuo, C. H. Lin, Woei Wu Pai (), K. C. Lin and T. B. Tang ()
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C. C. Kuo: Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan, R.O.C.
C. H. Lin: Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan, R.O.C.
Woei Wu Pai: Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan, R.O.C.
K. C. Lin: Department of Physics, Fu Jen Catholic University, Taipei, Taiwan, R.O.C.
T. B. Tang: Department of Physics, Hong Kong Baptist University, Hong Kong

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 739-743

Abstract: We report a scanning tunneling microscopy (STM) study of potassium (K)-dopedC60(KxC60) onCu(111) andAg(111), with focus on the observation of novelK-induced superstructures. OnCu(111),K-intercalation leads to various superstructures, i.e., p(3 × 3), p(2 × 2), and a disordered "maze-like" structure. Concomitant removal ofC60-induced substrate reconstruction was also observed. OnAg(111),K-doping inducesC60reorientation and results in a p(2 × 2) superstructure. All observed superstructures suggest intrinsic inhomogeneity ofK-doping in fullerene materials, which must be further understood.

Keywords: STM; C60; fulleride; Cu(111); Ag(111); doping (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07010172

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