Valence Band Resonant Levels in p‐Type Pb1—xEuxSe

(a) Groupe d’Etude des Mate´riaux Optoe´lectroniques, F. S. T. G., BP. 618,40000 Marrakech, Morocco(b) Groupe d’Etude des Semiconducteurs, UMR 5650, Universite´ Montpellier II,Place Euge`ne Bataillon, 34095 Montpellier Cedex 5, France(c) Centre for Electronic Materials and Devices, Imperial College of Science,Technology and Medicine, Exhibition Road, London SW7 2AY, UK(Received July 10, 2001; in revised form October 22, 2001; accepted November 6, 2001)Subject classification: 71.55.Ht; 73.50.Bk; 73.61.Le; S8Hall coefficient measurements on p-type lead salt PbSe and its ternary alloys Pb