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Titolo:
MAGNETOPHOTOLUMINESCENCE STUDIES OF ZN1-XMNXTE ZNTE MULTIPLE-QUANTUM-WELL AND QUANTUM-DOT STRUCTURES/
Autore:
GRIFFIN IJ; KLAR PJ; WOLVERSON D; DAVIES JJ; LUNN B; ASHENFORD DE; HENNING T;
Indirizzi:
UNIV E ANGLIA,SCH PHYS NORWICH NR4 7TJ NORFOLK ENGLAND UNIV E ANGLIA,SCH PHYS NORWICH NR4 7TJ NORFOLK ENGLAND UNIV HULL,DEPT ENGN DESIGN & MANUFACTURE KINGSTON HULL HU6 7RX N HUMBERSIDE ENGLAND GOTHENBURG UNIV,DEPT PHYS SE-1296 GOTHENBURG SWEDEN CHALMERS UNIV TECHNOL SE-1296 GOTHENBURG SWEDEN
Titolo Testata:
Journal of crystal growth
, volume: 185, anno: 1998,
pagine: 325 - 329
SICI:
0022-0248(1998)185:<325:MSOZZM>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOMODULATED REFLECTIVITY; BAND-OFFSET; SUPERLATTICES; WIRES;
Keywords:
QUANTUM DOT; NANO-FABRICATION; ZINC MANGANESE TELLURIDE; MAGNETOPHOTOLUMINESCENCE; DILUTE MAGNETIC SEMICONDUCTOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
I.J. Griffin et al., "MAGNETOPHOTOLUMINESCENCE STUDIES OF ZN1-XMNXTE ZNTE MULTIPLE-QUANTUM-WELL AND QUANTUM-DOT STRUCTURES/", Journal of crystal growth, 185, 1998, pp. 325-329

Abstract

Wide quantum dots were fabricated from multiple quantum-well (MQW) structures based on Zn1-xMnxTe/ZnTe (x = 0.076) dilute magnetic semiconductors and were investigated via photoluminescence (PL) in a magnetic held. Calculations taking into account the strain in the two types of structure enabled the PL transitions to be identified and show that the dominant emission in the MQWs is from heavy-hole (hh) excitons whereas in the quantum dots, the removal of the strain in the barrier layers generates a large biaxial tensile strain in the quantum wells which shifts the light-hole (Ih) exciton to lower energy than the hh exciton. The Ih exciton sigma(+) transition is virtually independent of magnetic field whilst the hh exciton is field-dependent. Thus, at fields of1-2 T, the hh exciton sigma(+) transition again becomes the lowest-energy transition of the quantum dots. These observations are described by a model with a chemical valence band offset of 30% for Zn1-xMnxTe/ZnTe. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/06/20 alle ore 11:38:54