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Spectral Momentum Density of Amorphous Carbon from ( e , 2 e ) Spectroscopy

1984; American Physical Society; Volume: 53; Issue: 21 Linguagem: Inglês

10.1103/physrevlett.53.2054

1092-0145

A. L. Ritter, JR Dennison, R. T. Jones,

Semiconductor materials and devices

The spectral momentum density of the valence band of an amorphous carbon film has been measured by ($e$, $2e$) spectroscopy. Two "bands," energy as a function of momentum, are resolved. One extends from 23 eV below the Fermi energy to about 10 eV below ${E}_{\mathrm{F}}$. The other, \ensuremath{\sim} 9 eV below ${E}_{\mathrm{F}}$, does not disperse significantly. Although the existence of diamond bonding in the film cannot be ruled out, the bands are more suggestive of the graphite band structure.