Angle-resolved high-resolution photoemission spectra of the ? phase of Pb/Ge(111)-(?3×?3)R30° have been measured below (100 K) and above (300 and 500 K) the transition to a charge-density-wave insulator state. The spectra strongly differ from those expected from the published local density approximation calculations showing a surface band without dispersion and correlation and fluctuation effects also at high temperature. A pseudogap is observed at 100 K.
Temperature and momentum dependence of the spectral function of the charge-density wave and of the normal ? phase of Pb/Ge(111)
C Cepek;S Modesti
1997
Abstract
Angle-resolved high-resolution photoemission spectra of the ? phase of Pb/Ge(111)-(?3×?3)R30° have been measured below (100 K) and above (300 and 500 K) the transition to a charge-density-wave insulator state. The spectra strongly differ from those expected from the published local density approximation calculations showing a surface band without dispersion and correlation and fluctuation effects also at high temperature. A pseudogap is observed at 100 K.File in questo prodotto:
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