Randomly distributed ultrasmall metal particles on the surface of high mobility 2DEG samples

P. Omling; H. Linke; K. Deppert; L. Samuelson; H. A. Carmona; A. K. Geim; P. C. Main

doi:10.1006/spmi.1994.1071

Randomly distributed ultrasmall metal particles on the surface of high mobility 2DEG samples

P. Omling, H. Linke, K. Deppert, L. Samuelson, H. A. Carmona, A. K. Geim, P. C. Main

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

Abstract

Uniformly sized ultrasmall silver particles, 33 nm in diameter, have been deposited on the surface of modulation-doped GaAs/Al0.33Ga0.67As samples, containing a high mobility two-dimensional electron gas (2DEG). The particles are distributed randomly on the surface. It can be expected, that the carrier concentration underneath each particle is influenced by the change in the surface condition, if the 2DEG is sufficiently close to the surface. Since the size of the particles is of the order of the electron wavelength, this technique is potentially interesting for the study of quantum size effects. We report on the first experimental results from magnetotransport experiments. No indication of electron-wave interference effects was found. However, in some of the samples, we observe an increase of the mobility when a few percent of the surface is covered with aerosol particles. This phenomenon is described and discussed.

Original language	English
Pages (from-to)	367-371
Number of pages	4
Journal	Superlattices and microstructures
Volume	15
Issue number	3
DOIs	https://doi.org/10.1006/spmi.1994.1071
Publication status	Published - 1994

Keywords

scattering

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10.1006/spmi.1994.1071

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title = "Randomly distributed ultrasmall metal particles on the surface of high mobility 2DEG samples",

abstract = "Uniformly sized ultrasmall silver particles, 33 nm in diameter, have been deposited on the surface of modulation-doped GaAs/Al0.33Ga0.67As samples, containing a high mobility two-dimensional electron gas (2DEG). The particles are distributed randomly on the surface. It can be expected, that the carrier concentration underneath each particle is influenced by the change in the surface condition, if the 2DEG is sufficiently close to the surface. Since the size of the particles is of the order of the electron wavelength, this technique is potentially interesting for the study of quantum size effects. We report on the first experimental results from magnetotransport experiments. No indication of electron-wave interference effects was found. However, in some of the samples, we observe an increase of the mobility when a few percent of the surface is covered with aerosol particles. This phenomenon is described and discussed.",

keywords = "scattering",

author = "P. Omling and H. Linke and K. Deppert and L. Samuelson and Carmona, {H. A.} and Geim, {A. K.} and Main, {P. C.}",

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doi = "10.1006/spmi.1994.1071",

language = "English",

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journal = "Superlattices and microstructures",

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TY - JOUR

T1 - Randomly distributed ultrasmall metal particles on the surface of high mobility 2DEG samples

AU - Omling, P.

AU - Linke, H.

AU - Deppert, K.

AU - Samuelson, L.

AU - Carmona, H. A.

AU - Geim, A. K.

AU - Main, P. C.

N1 - Qa793 Times Cited:1 Cited References Count:5

PY - 1994

Y1 - 1994

N2 - Uniformly sized ultrasmall silver particles, 33 nm in diameter, have been deposited on the surface of modulation-doped GaAs/Al0.33Ga0.67As samples, containing a high mobility two-dimensional electron gas (2DEG). The particles are distributed randomly on the surface. It can be expected, that the carrier concentration underneath each particle is influenced by the change in the surface condition, if the 2DEG is sufficiently close to the surface. Since the size of the particles is of the order of the electron wavelength, this technique is potentially interesting for the study of quantum size effects. We report on the first experimental results from magnetotransport experiments. No indication of electron-wave interference effects was found. However, in some of the samples, we observe an increase of the mobility when a few percent of the surface is covered with aerosol particles. This phenomenon is described and discussed.

AB - Uniformly sized ultrasmall silver particles, 33 nm in diameter, have been deposited on the surface of modulation-doped GaAs/Al0.33Ga0.67As samples, containing a high mobility two-dimensional electron gas (2DEG). The particles are distributed randomly on the surface. It can be expected, that the carrier concentration underneath each particle is influenced by the change in the surface condition, if the 2DEG is sufficiently close to the surface. Since the size of the particles is of the order of the electron wavelength, this technique is potentially interesting for the study of quantum size effects. We report on the first experimental results from magnetotransport experiments. No indication of electron-wave interference effects was found. However, in some of the samples, we observe an increase of the mobility when a few percent of the surface is covered with aerosol particles. This phenomenon is described and discussed.

KW - scattering

U2 - 10.1006/spmi.1994.1071

DO - 10.1006/spmi.1994.1071

M3 - Article

SN - 1096-3677

VL - 15

SP - 367

EP - 371

JO - Superlattices and microstructures

JF - Superlattices and microstructures

IS - 3

ER -

Randomly distributed ultrasmall metal particles on the surface of high mobility 2DEG samples

Abstract

Keywords

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