Raman and photoluminescence spectra of Zn1-xCdxSe/Zn1-yMnySe: A diluted-magnetic-semiconductor superlattice

R. G. Alonso, Eunsoon Oh, A. K. Ramdas, H. Luo, Nitin Samarth, J. K. Furdyna, L. R. Ram-Mohan

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The luminescence spectrum of Zn1-xCdxSe/Zn1-yMnySe superlattices grown by molecular-beam epitaxy on (001) GaAs substrates shows quantum-well confinement and Zeeman shifts due to wave-function penetration into the barrier that are in excellent agreement with calculations using the transfer-matrix method based on the kp formalism. The new periodicity introduced by the superlattice causes zone folding of the acoustic branch, allowing modes with large q vectors to become Raman active. The Raman spectrum shows the folded acoustic phonons of superlattices with as few as ten periods. In addition to the excitonic Zeeman shifts, these magnetic superlattices exhibit the Raman-electron paramagnetic resonance of Mn2+ typical of the Mn-based diluted magnetic semiconductors.

Original languageEnglish (US)
Pages (from-to)8009-8016
Number of pages8
JournalPhysical Review B
Volume44
Issue number15
DOIs
StatePublished - Jan 1 1991

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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