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Permanent link (DOI): https://doi.org/10.7939/R3MW28S56

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Silicon Dangling Bond Chains Open Access

Descriptions

Other title
Subject/Keyword
Scanning Tunnelling Microscopy
NDR
Scanning Tunnelling Microscope
Dangling Bond
Silicon
Tunneling
STM
DB
Atomic Lines
Negative Differential Resistance
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wood, John A
Supervisor and department
Wolkow, Robert (Physics)
Examining committee member and department
LeBlanc, Lindsey (Physics)
Heimpel, Moritz (Physics)
Department
Department of Physics
Specialization

Date accepted
2017-01-20T10:39:47Z
Graduation date
2017-06:Spring 2017
Degree
Master of Science
Degree level
Master's
Abstract
We present the characterization of close-spaced linear dangling bond structures, or dangling bond chains, two to seven dangling bonds long, on a hydrogen terminated silicon (100)-2x1 surface using a scan- ning tunnelling microscope. Constant height differential conductance maps reveal their local density of states. We demonstrate maximal charging configurations for odd numbered chains, rendering dan- gling bonds of the chain alternately negatively and non-negatively charged. Perturbing a chain electrostatically with negatively charged single dangling bonds, we find that we significantly change the elec- tronic structure of the chain, shifting its electronic state density away from the perturbing charge. Turning the single dangling bond into a bare dimer, the chain takes on its unperturbed character, proving that bare dimers do not support localized charge. Using the differential conductance mapping technique, we measure the energetic position of an unexplained bright feature often seen between two dangling bonds.
Language
English
DOI
doi:10.7939/R3MW28S56
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
J. A. Wood, M. Rashidi, M. Koleini, J. L. Pitters, and R. A. Wolkow. Multiple Silicon Atom Artificial Molecules. 2016. eprint: arXiv:1607.06050.

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File title: Abstract
File title: Silicon Dangling Bond Chains
File author: © John A. Wood, University of Alberta, Faculty of Science
File author: John A. Wood, University of Alberta, Faculty of Science
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