Anomalous behavior of the Fermi energy in heavily tin-doped InGaAs A. Tsukernik, D. Cheskis, O. Potashnik, A. Palevski, S. Bar-Ad, S. Luryi and A. Cho Eur. Phys. J. B, 23 3 (2001) 341-344 Published online: 15 October 2001 DOI: 10.1007/s100510170053