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An angle-resolved photoemission study of epitaxied Bi(111) film on Si(111)-(7×7) surface has been carried out at a temperature from 10K to 210K. The results show that there exists strong temperature dependence in the valence band of Bi(111) film. The variations in the spectral intensity and shape indicate the importance of phonon-assisted indirect transition in the photoemission process. The thermal...
Domain boundaries of superlattices formed on the highly oriented pyrolytic graphite surface are studied by scanning tunneling microscopy. Twist and glide boundaries are identified with help of theoretical simulations. The apparent vertical corrugation difference of the superlattices with the same lattice periodicity is explained in terms of overlayer attenuation. Our study reveals that the intra-layer...
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