References
- Antoniadis , H. and Schiff , E. A. 1991 . Phys. Rev. B , 43 : 13975
- Devlen , R. I. , Tauc , J. and Schiff , E. A. 1989 . J. non-crystalline Solids , 114 : 569
- Furukawa , S. and Matsumoto , N. 1983 . Phys. Rev. B , 27 : 4955
- Kocka , J. , Nebel , C. E. , Bauer , G. H. , Klima , O. , Xiao , Y. , Sipek , E. and Juska , G. 1990 . The Physics of Semiconductors , Edited by: Anastassakis , E. M. and Joannopoulos , J. D. 2059 Singapore : World Scientific .
- Kocka , J. , Klima , O. , Sipek , E. , Nebel , C. E. , Bauer , G. H. , Juska , G. and Hoheisel , H. 1992 . Phys. Rev. B , 45 : 6593
- Lampert , M. A. and Mark , P. 1970 . Current Injection in Solids , New York : Academic Press .
- Monroe , D. 1985 . Phys. Rev. Lett. , 54 : 146
- Nebel , C. E. 1991 . J. non-crystalline Solids , 137–138 : 395
- Nebel , C. E. and Street , R. A. 1993 . Phil. Mag. B , submitted
- Nebel , C. E. , Street , R. A. , Johnson , N. M. and Kocka , J. 1992a . Phys. Rev. B , 46 : 6789
- Nebel , C. E. , Street , R. A. , Johnson , N. M. and Tsai , C. C. 1992b . Phys. Rev. B , 46 : 6803
- Pierz , K. , Mell , H. and Fuhs , W. 1990 . Material Research Symposium Proceedings , Vol. 192 , 95 Pittsburgh , Pennsylvania : Materials Research Society .
- Rose , A. 1955 . Phys. Rev. , 97 : 1538
- Schmidlin , F. W. 1977 . Phys. Rev. B , 16 : 2362
- Shklovskii , B. I. , Levin , E. I. , Fritzsche , H. and Baranovskii , S. D. 1990 . Advances in Disordered Semiconductors , Edited by: Fritzsche , H. Vol. 3 , 161 Singapore : World Scientific .
- Silver , M. , Snow , E. , Wesson , D. , Okamoto , K. , Konenkamp , R. and Herman , A. M. 1984 . J. non-crystalline Solids , 66 : 237
- Silver , M. and Bässler , H. 1987 . Phil. Mag. B , 56 : 109
- Stachowitz , R. , Fuhs , W. and Jahn , K. 1990 . Phil. Mag. B , 62 : 5
- Street , R. A. 1989 . Phil. Mag. B , 60 : 213
- Tiedje , T. 1987 . Proceedings of the International Workshop on Amorphous Semiconductors , Edited by: Fritzsche , H. , Han , D.-X. and Tsai , C. C. 113 Singapore : World Scientific .