Optical absorption of a cleaved surface of germanium shows a band at energies smaller than the gap, that is removed when the surface is oxidized. The band is assumed to be due to optical excitation of a surface state practically coincident with the top of the valence band to a set of states 0.16 eV below the bottom of the conduction band.
Optical detection of surface states on cleaved (111) surfaces of Ge / G., Chiarotti; G., Del Signore; Nannarone, Stefano. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 21:(1968), pp. 1170-1172. [10.1103/PhysRevLett.21.1170]
Optical detection of surface states on cleaved (111) surfaces of Ge
NANNARONE, Stefano
1968
Abstract
Optical absorption of a cleaved surface of germanium shows a band at energies smaller than the gap, that is removed when the surface is oxidized. The band is assumed to be due to optical excitation of a surface state practically coincident with the top of the valence band to a set of states 0.16 eV below the bottom of the conduction band.Pubblicazioni consigliate
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