Raman scattering in annealed isotopic (70Ge)n(74Ge)m superlattices

E. Silveira; W. Dondl; G. Abstreiter; E. E. Haller

doi:10.1016/S1386-9477(98)00061-7

Raman scattering in annealed isotopic (⁷⁰Ge)_n(⁷⁴Ge)_m superlattices

E. Silveira, W. Dondl, G. Abstreiter, E. E. Haller

TUM Emeriti of Excellence

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Raman scattering by optical phonons is used to study the interface intermixing in isotopic (⁷⁰Ge)_n(⁷⁴Ge)_m thin superlattices, with n and m equal to 8, 12, 16 and 24 atomic monolayers, for annealling at 500°C and various times. The experimental results compares very well with theoretical calculations within the planar force constant model and the bond polarizability approach. The diffusion is simulated by a combination of the virtual crystal approximation and the solution of the Fick's diffusion equation for the superlattice geometry.

Original language	English
Pages (from-to)	291-294
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	2
Issue number	1-4
DOIs	https://doi.org/10.1016/S1386-9477(98)00061-7
State	Published - 15 Jul 1998

Keywords

Isotopic superlattices
Raman scattering
Self-diffusion

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10.1016/S1386-9477(98)00061-7

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abstract = "Raman scattering by optical phonons is used to study the interface intermixing in isotopic (70Ge)n(74Ge)m thin superlattices, with n and m equal to 8, 12, 16 and 24 atomic monolayers, for annealling at 500°C and various times. The experimental results compares very well with theoretical calculations within the planar force constant model and the bond polarizability approach. The diffusion is simulated by a combination of the virtual crystal approximation and the solution of the Fick's diffusion equation for the superlattice geometry.",

keywords = "Isotopic superlattices, Raman scattering, Self-diffusion",

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T1 - Raman scattering in annealed isotopic (70Ge)n(74Ge)m superlattices

AU - Silveira, E.

AU - Dondl, W.

AU - Abstreiter, G.

AU - Haller, E. E.

PY - 1998/7/15

Y1 - 1998/7/15

N2 - Raman scattering by optical phonons is used to study the interface intermixing in isotopic (70Ge)n(74Ge)m thin superlattices, with n and m equal to 8, 12, 16 and 24 atomic monolayers, for annealling at 500°C and various times. The experimental results compares very well with theoretical calculations within the planar force constant model and the bond polarizability approach. The diffusion is simulated by a combination of the virtual crystal approximation and the solution of the Fick's diffusion equation for the superlattice geometry.

AB - Raman scattering by optical phonons is used to study the interface intermixing in isotopic (70Ge)n(74Ge)m thin superlattices, with n and m equal to 8, 12, 16 and 24 atomic monolayers, for annealling at 500°C and various times. The experimental results compares very well with theoretical calculations within the planar force constant model and the bond polarizability approach. The diffusion is simulated by a combination of the virtual crystal approximation and the solution of the Fick's diffusion equation for the superlattice geometry.

KW - Isotopic superlattices

KW - Raman scattering

KW - Self-diffusion

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JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

ER -

Raman scattering in annealed isotopic (⁷⁰Ge)_n(⁷⁴Ge)_m superlattices

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Keywords

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