Charge transfer and a new image state of C60 on Cu(1 1 1) surface studied by inverse photoemission
作者： K.-D. Tsuei , P.D. Johnson
DOI: 10.1016/S0038-1098(96)00590-X
关键词: Chemistry 、 Spectral line 、 Fermi level 、 Overlayer 、 Surface states 、 Electronic structure 、 Condensed matter physics 、 Vacuum level 、 Inverse photoemission spectroscopy 、 Effective mass (solid-state physics)
摘要: Abstract We have used inverse photoemission to study ultra-thin C 60 films adsorbed on Cu(1 1 1) surfaces. Unlike a previous of adsorption Au film where the unoccupied states shift rigidly towards Fermi level, spectra here look strongly perturbed and more like those characteristic K 3 . This indicates that interaction with Cu is much stronger than Au. Annealing at 350°C results in well ordered (4 × 4) structure as seen LEED. An additional broad peak appears below vacuum level. new state has parabolic dispersion an effective mass close unity. interpret this image or resonance top metallized overlayer.
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