The photoluminescence (PL) of InP/In0.53Ga0.47 As superlattices doped with
Si in the inner barriers was studied. In magnetic fields 0-18 T applied par
allel to the growth direction the PL develops a Landau level structure. An
analysis of the Landau level fan diagram leads us to the conclusion that th
e luminescence observed is due to transitions between electronic and hole s
tates whose envelope wave functions are fully localized in the wells at the
boundary of the superlattice (Tamm states). (C) 2001 Elsevier Science B.V.
All rights reserved.