Angular resolved photoemission from intrinsic surface states on Al (100) |
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Authors: | PO Gartland BJ Slagsvold |
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Institution: | Department of Physics, The Norwegian Institute of Technology, 7034 Trondheim, Norway |
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Abstract: | Using photon energies of 11.7, 16.8 and 21.2 eV, we have recorded angular resolved photoemission spectra from clean Al (100). A dominant, surface sensitive peak is interpreted as emission from a two-dimensional band of surface states. The band mass is , and the band minimum, (2.8±0.2) eV below EF for surface momentum k6=0, is located within the bulk band gap. The observed existence of the peak for large values of k6, indicates a transition from a true surface state to a surface resonance. |
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