Fermi-edge singularity in the luminescence spectra of II-VI modulation-doping quantum wells

被引：8

作者：

Coli, G

Calcagnile, L

Giugno, PV

Cingolani, R

Rinaldi, R

Vanzetti, L

Sorba, L

Franciosi, A

机构：

[1] UNIV LECCE, DIPARTIMENTO SCI MAT, CNR, IST NUOVI MAT ELETT, I-73100 LECCE, ITALY

[2] INFM, LAB TECNOL AVANZATE SUPERFICI & CATALISI, I-34012 TRIESTE, ITALY

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.55.R7391

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The occurrence of correlation enhancement at the Fermi edge is demonstrated in the luminescence spectra of modulation-doped Zn1-xCdxSe/ZnSe quantum wells. The Fermi-edge singularity (FES) is observed at low temperature and is rapidly quenched with increasing temperature. A line-shape analysis reveals that recombination involves momentum-nonconserving transitions between electrons and localized holes. The temperature increase causes thermal activation of the trapped carriers and the consequent recovery of the momentum-conserving recombination. Many-body analysis of the FES line-shape indicates a characteristic localization length of about 14 nm for the holes, which we associate with compositional fluctuations in the ternary alloy quantum wells.

引用

页码：R7391 / R7393

页数：3

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