Quantitative analysis of low-frequency current oscillation in semi-insulating GaAs M. Kiyama, M. Yamada and M. Tatsumi Eur. Phys. J. Appl. Phys., 27 1-3 (2004) 185-188 Published online: 15 July 2004 DOI: 10.1051/epjap:2004150