Interplay between adsorbate diffusion and electron tunneling at an insulating surface

Keith McKenna; Thomas Trevethan; Alexander Shluger

doi:10.1103/PhysRevB.82.085427

Interplay between adsorbate diffusion and electron tunneling at an insulating surface

Keith McKenna
, Thomas Trevethan
, Alexander Shluger

Physics

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

Abstract

We investigate electron tunneling between defects and mobile adsorbates on the surface of MgO and show that electrons can be transferred to Au and Pt atoms from defects, such as oxygen vacancies, over distances similar to 20 angstrom even at room temperature. As a result of the surface-mediated interaction following electron transfer, the mobility of these metal atoms is enhanced significantly. Such processes may affect the kinetics of growth and structure of adsorbed clusters and thin films and the interaction of molecules with surfaces.

Original language	English
Article number	085427
Number of pages	6
Journal	Physical Review B
Volume	82
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.82.085427
Publication status	Published - 18 Aug 2010

Keywords

DENSITY-FUNCTIONAL THEORY
MGO SURFACE
MGO(001) SURFACE
POLYCRYSTALLINE MGO
MGO(100) SURFACE
OXYGEN VACANCIES
CHARGE-TRANSFER
OXIDE SURFACES
DEFECT SITES
IONIC OXIDE

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10.1103/PhysRevB.82.085427

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title = "Interplay between adsorbate diffusion and electron tunneling at an insulating surface",

abstract = "We investigate electron tunneling between defects and mobile adsorbates on the surface of MgO and show that electrons can be transferred to Au and Pt atoms from defects, such as oxygen vacancies, over distances similar to 20 angstrom even at room temperature. As a result of the surface-mediated interaction following electron transfer, the mobility of these metal atoms is enhanced significantly. Such processes may affect the kinetics of growth and structure of adsorbed clusters and thin films and the interaction of molecules with surfaces.",

keywords = "DENSITY-FUNCTIONAL THEORY, MGO SURFACE, MGO(001) SURFACE, POLYCRYSTALLINE MGO, MGO(100) SURFACE, OXYGEN VACANCIES, CHARGE-TRANSFER, OXIDE SURFACES, DEFECT SITES, IONIC OXIDE",

author = "Keith McKenna and Thomas Trevethan and Alexander Shluger",

year = "2010",

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doi = "10.1103/PhysRevB.82.085427",

language = "English",

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T1 - Interplay between adsorbate diffusion and electron tunneling at an insulating surface

AU - McKenna, Keith

AU - Trevethan, Thomas

AU - Shluger, Alexander

PY - 2010/8/18

Y1 - 2010/8/18

N2 - We investigate electron tunneling between defects and mobile adsorbates on the surface of MgO and show that electrons can be transferred to Au and Pt atoms from defects, such as oxygen vacancies, over distances similar to 20 angstrom even at room temperature. As a result of the surface-mediated interaction following electron transfer, the mobility of these metal atoms is enhanced significantly. Such processes may affect the kinetics of growth and structure of adsorbed clusters and thin films and the interaction of molecules with surfaces.

AB - We investigate electron tunneling between defects and mobile adsorbates on the surface of MgO and show that electrons can be transferred to Au and Pt atoms from defects, such as oxygen vacancies, over distances similar to 20 angstrom even at room temperature. As a result of the surface-mediated interaction following electron transfer, the mobility of these metal atoms is enhanced significantly. Such processes may affect the kinetics of growth and structure of adsorbed clusters and thin films and the interaction of molecules with surfaces.

KW - DENSITY-FUNCTIONAL THEORY

KW - MGO SURFACE

KW - MGO(001) SURFACE

KW - POLYCRYSTALLINE MGO

KW - MGO(100) SURFACE

KW - OXYGEN VACANCIES

KW - CHARGE-TRANSFER

KW - OXIDE SURFACES

KW - DEFECT SITES

KW - IONIC OXIDE

UR - https://www.scopus.com/pages/publications/77957579271

U2 - 10.1103/PhysRevB.82.085427

DO - 10.1103/PhysRevB.82.085427

M3 - Article

SN - 1098-0121

VL - 82

JO - Physical Review B

JF - Physical Review B

IS - 8

M1 - 085427

ER -

Interplay between adsorbate diffusion and electron tunneling at an insulating surface

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Keywords

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