Temperature-dependent fermi gap opening in the c(6x4)-C60/Ag(100) two-dimensional superstructure |
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Authors: | Cepek C Vobornik I Goldoni A Magnano E Selvaggi G Kröger J Panaccione G Rossi G Sancrotti M |
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Institution: | Laboratorio Nazionale TASC-INFM, Trieste, Italy. |
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Abstract: | High-resolution angle-integrated photoemission of one monolayer of C (60) chemisorbed on Ag(100) shows the reversible opening of a gap at the Fermi level at temperatures 25< or =T< or =300 K. The gap reaches a maximum value of approximately 10 meV at T< or =70 K. This finding is the first evidence of an electronic phase transition in C60 monolayers and has implications on the ongoing debate about surface superconductivity in C60-based bulk materials. |
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