Single-particle excitations and many-particle interactions in quantum wires and dots

被引：75

作者：

Schuller, C

Biese, G

Keller, K

Steinebach, C

Heitmann, D

Grambow, P

Eberl, K

机构：

[1] UNIV HAMBURG,ZENTRUM MIKROSTRUKTURFORSCH,D-20355 HAMBURG,GERMANY

[2] MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.54.R17304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated electronic excitations in GaAs-AlxGa1-xAs quantum wires, and dots by resonance Raman spectroscopy. We find for quantum dots and quantum wires three types of excitations; single-particle, spin-density, and charge-density excitations (SPE's, SDE's, and CDE's, respectively), Our experiments show that SPE's are enhanced under conditions of extreme resonance, which indicates that energy-density fluctuations are responsible for the excitation of unscreened SPE's. The high intensity of the SPE's allows a detailed analysis of collective effects in the zero- and one-dimensional electron systems.

引用

页码：17304 / 17307

页数：4

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