VIRTUAL EXCITATION OF THE FERMI-EDGE SINGULARITY IN MODULATION-DOPED QUANTUM-WELLS

被引：26

作者：

BRENER, I

KNOX, WH

SCHAEFER, W

机构：

[1] FORSCHUNGSZENTRUM JULICH,HLRZ,D-52425 JULICH,GERMANY

[2] AT&T BELL LABS,HOLMDEL,NJ 07733

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.51.2005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Fermi-edge singularity (FES) in modulation-doped GaAs quantum wells is a unique many-body feature that arises from strong Coulomb correlations within a dense sea of electrons. Using intense ultrashort excitation, we show experimentally and theoretically that the nonresonant nonlinearity (ac Stark shift) of the FES is dramatically different than that of the excitonic ac Stark shift of undoped-quantum-well excitons. © 1995 The American Physical Society.

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页码：2005 / 2008

页数：4

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