Many-particle effects in Ge quantum dots investigated by time-resolved capacitance spectroscopy

C. M.A. Kapteyn; M. Lion; R. Heitz; D. Bimberg; C. Miesner; T. Asperger; K. Brunner; G. Abstreiter

doi:10.1063/1.1334651

Many-particle effects in Ge quantum dots investigated by time-resolved capacitance spectroscopy

C. M.A. Kapteyn, M. Lion, R. Heitz, D. Bimberg, C. Miesner, T. Asperger, K. Brunner, G. Abstreiter

Natural Sciences

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45 Scopus citations

Abstract

Hole emission from self-organized Ge quantum dots with a diameter of ∼70 nm in a Si matrix is investigated by time-resolved capacitance spectroscopy [deep level transient spectroscopy (DLTS)]. A complex DLTS signal is observed and explained in terms of thermally activated emission from localized many-particle states. In particular, a gradually decreasing activation energy is found with increasing hole population. A qualitative understanding of the DLTS signal and the observed activation energies is achieved in terms of many-particle states determined by quantization and Coulomb charging.

Original language	English
Pages (from-to)	4169-4171
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	25
DOIs	https://doi.org/10.1063/1.1334651
State	Published - 18 Dec 2000

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abstract = "Hole emission from self-organized Ge quantum dots with a diameter of ∼70 nm in a Si matrix is investigated by time-resolved capacitance spectroscopy [deep level transient spectroscopy (DLTS)]. A complex DLTS signal is observed and explained in terms of thermally activated emission from localized many-particle states. In particular, a gradually decreasing activation energy is found with increasing hole population. A qualitative understanding of the DLTS signal and the observed activation energies is achieved in terms of many-particle states determined by quantization and Coulomb charging.",

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T1 - Many-particle effects in Ge quantum dots investigated by time-resolved capacitance spectroscopy

AU - Kapteyn, C. M.A.

AU - Lion, M.

AU - Heitz, R.

AU - Bimberg, D.

AU - Miesner, C.

AU - Asperger, T.

AU - Brunner, K.

AU - Abstreiter, G.

PY - 2000/12/18

Y1 - 2000/12/18

N2 - Hole emission from self-organized Ge quantum dots with a diameter of ∼70 nm in a Si matrix is investigated by time-resolved capacitance spectroscopy [deep level transient spectroscopy (DLTS)]. A complex DLTS signal is observed and explained in terms of thermally activated emission from localized many-particle states. In particular, a gradually decreasing activation energy is found with increasing hole population. A qualitative understanding of the DLTS signal and the observed activation energies is achieved in terms of many-particle states determined by quantization and Coulomb charging.

AB - Hole emission from self-organized Ge quantum dots with a diameter of ∼70 nm in a Si matrix is investigated by time-resolved capacitance spectroscopy [deep level transient spectroscopy (DLTS)]. A complex DLTS signal is observed and explained in terms of thermally activated emission from localized many-particle states. In particular, a gradually decreasing activation energy is found with increasing hole population. A qualitative understanding of the DLTS signal and the observed activation energies is achieved in terms of many-particle states determined by quantization and Coulomb charging.

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DO - 10.1063/1.1334651

M3 - Article

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VL - 77

SP - 4169

EP - 4171

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 25

ER -

Many-particle effects in Ge quantum dots investigated by time-resolved capacitance spectroscopy

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