Adatom diffusion characteristics from STM noise: theory

M. Sumetskii; A. A. Kornyshev; U. Stimming

doi:10.1016/0039-6028(94)90364-6

Adatom diffusion characteristics from STM noise: theory

M. Sumetskii, A. A. Kornyshev, U. Stimming

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Abstract

Adatoms moving along the substrate surface under an STM tip cause a random time dependence of the current, J(t). We have obtained simple expressions for the average current 〈J(t)〉 and the temporary current correlation function 〈J(t +τ)J(τ)〉_τ - 〈J(t)〉² through the diffusion coefficients of the adatoms and a few parameters of the tunneling gap. The results offer a way to study the local diffusion of adatoms by treatment of experimentally measured J(t) dependencies.

Original language	English
Pages (from-to)	23-27
Number of pages	5
Journal	Surface Science
Volume	307-309
Issue number	PART A
DOIs	https://doi.org/10.1016/0039-6028(94)90364-6
State	Published - 20 Apr 1994
Externally published	Yes

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title = "Adatom diffusion characteristics from STM noise: theory",

abstract = "Adatoms moving along the substrate surface under an STM tip cause a random time dependence of the current, J(t). We have obtained simple expressions for the average current 〈J(t)〉 and the temporary current correlation function 〈J(t +τ)J(τ)〉τ - 〈J(t)〉2 through the diffusion coefficients of the adatoms and a few parameters of the tunneling gap. The results offer a way to study the local diffusion of adatoms by treatment of experimentally measured J(t) dependencies.",

author = "M. Sumetskii and Kornyshev, {A. A.} and U. Stimming",

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T2 - theory

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AU - Kornyshev, A. A.

AU - Stimming, U.

PY - 1994/4/20

Y1 - 1994/4/20

N2 - Adatoms moving along the substrate surface under an STM tip cause a random time dependence of the current, J(t). We have obtained simple expressions for the average current 〈J(t)〉 and the temporary current correlation function 〈J(t +τ)J(τ)〉τ - 〈J(t)〉2 through the diffusion coefficients of the adatoms and a few parameters of the tunneling gap. The results offer a way to study the local diffusion of adatoms by treatment of experimentally measured J(t) dependencies.

AB - Adatoms moving along the substrate surface under an STM tip cause a random time dependence of the current, J(t). We have obtained simple expressions for the average current 〈J(t)〉 and the temporary current correlation function 〈J(t +τ)J(τ)〉τ - 〈J(t)〉2 through the diffusion coefficients of the adatoms and a few parameters of the tunneling gap. The results offer a way to study the local diffusion of adatoms by treatment of experimentally measured J(t) dependencies.

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JO - Surface Science

JF - Surface Science

IS - PART A

ER -

Adatom diffusion characteristics from STM noise: theory

Abstract

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