Electronic and magnetic properties of graphite quantum dots
We study the electronic and magnetic properties of multilayer quantum dots (MQDs) of graphite in the nearest-neighbor approximation of tight-binding model. We calculate the electronic density of states and orbital susceptibility of the system as function of the Fermi level location. We demonstrate t...
Saved in:
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/105952 http://hdl.handle.net/10220/26062 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-105952 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1059522023-02-28T19:34:39Z Electronic and magnetic properties of graphite quantum dots Abdelsalam, Hazem Espinosa-Ortega, Tania Luk'yanchuk, Igor School of Physical and Mathematical Sciences DRNTU::Science::Physics::Electricity and magnetism We study the electronic and magnetic properties of multilayer quantum dots (MQDs) of graphite in the nearest-neighbor approximation of tight-binding model. We calculate the electronic density of states and orbital susceptibility of the system as function of the Fermi level location. We demonstrate that properties of MQD depend strongly on the shape of the system, on the parity of the layer number and on the form of the cluster edge. The special emphasis is given to reveal the new properties with respect to the monolayer graphene quantum dots. The most interesting results are obtained for the triangular MQD with zig-zag edge at near-zero energies. The asymmetrically smeared multipeak feature is observed at Dirac point within the size-quantized energy gap region, where monolayer graphene flakes demonstrate the highly-degenerate zero-energy state. This feature, provided by the edge-localized electronic states results in the splash-wavelet behavior in diamagnetic orbital susceptibility as function of energy. Published version 2015-06-25T02:07:33Z 2019-12-06T22:01:25Z 2015-06-25T02:07:33Z 2019-12-06T22:01:25Z 2015 2015 Journal Article Abdelsalam, H., Espinosa-Ortega, T., & Luk'yanchuk, I. (2015). Electronic and magnetic properties of graphite quantum dots. Low Temperature Physics, 41(5), 396-400. 1063-777X https://hdl.handle.net/10356/105952 http://hdl.handle.net/10220/26062 10.1063/1.4919377 en Low Temperature Physics © 2015 AIP Publishing LLC. This paper was published in Low Temperature Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The published version is available at: [http://dx.doi.org/10.1063/1.4919377]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
DRNTU::Science::Physics::Electricity and magnetism |
spellingShingle |
DRNTU::Science::Physics::Electricity and magnetism Abdelsalam, Hazem Espinosa-Ortega, Tania Luk'yanchuk, Igor Electronic and magnetic properties of graphite quantum dots |
description |
We study the electronic and magnetic properties of multilayer quantum dots (MQDs) of graphite in the nearest-neighbor approximation of tight-binding model. We calculate the electronic density of states and orbital susceptibility of the system as function of the Fermi level location. We demonstrate that properties of MQD depend strongly on the shape of the system, on the parity of the layer number and on the form of the cluster edge. The special emphasis is given to reveal the new properties with respect to the monolayer graphene quantum dots. The most interesting results are obtained for the triangular MQD with zig-zag edge at near-zero energies. The asymmetrically smeared multipeak feature is observed at Dirac point within the size-quantized energy gap region, where monolayer graphene flakes demonstrate the highly-degenerate zero-energy state. This feature, provided by the edge-localized electronic states results in the splash-wavelet behavior in diamagnetic orbital susceptibility as function of energy. |
author2 |
School of Physical and Mathematical Sciences |
author_facet |
School of Physical and Mathematical Sciences Abdelsalam, Hazem Espinosa-Ortega, Tania Luk'yanchuk, Igor |
format |
Article |
author |
Abdelsalam, Hazem Espinosa-Ortega, Tania Luk'yanchuk, Igor |
author_sort |
Abdelsalam, Hazem |
title |
Electronic and magnetic properties of graphite quantum dots |
title_short |
Electronic and magnetic properties of graphite quantum dots |
title_full |
Electronic and magnetic properties of graphite quantum dots |
title_fullStr |
Electronic and magnetic properties of graphite quantum dots |
title_full_unstemmed |
Electronic and magnetic properties of graphite quantum dots |
title_sort |
electronic and magnetic properties of graphite quantum dots |
publishDate |
2015 |
url |
https://hdl.handle.net/10356/105952 http://hdl.handle.net/10220/26062 |
_version_ |
1759854112075153408 |