Accession Number : AD0886918

Title :   Photoemission and Optical Studies of Amorphous Germanium,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s) : Ashley, E. J. ; Bennett, J. M. ; Donovan, T. M. ; Fischer, J. E. ; Seraphin, B. O.

Report Date : MAY 1971

Pagination or Media Count : 55

Abstract : An optical density of states has been determined for amorphous germanium (Ge) by a combination of photoemission and optical measurements. This density of states does not correspond to theoretical models that predict tails of localized levels in the forbidden gap and mobility edges separating bands of extended states. The absorption edge is as sharp as crystalline Ge. However, certain features of the crystalline density of states that relate to the long-range order (Brillouin-zone effects as evidenced by critical point structure) are completely absent in the amorphous phase. (Author)

Descriptors :   (*SEMICONDUCTORS, BAND THEORY OF SOLIDS), (*GERMANIUM, OPTICAL PROPERTIES), INFRARED DETECTORS, SEMICONDUCTING FILMS, PHOTOELECTRIC EFFECT, SINGLE CRYSTALS, BRILLOUIN ZONES, REPORTS.

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE