Imperial College London
Alternate

ProfessorArashMostofi

Faculty of Engineering, Department of Materials

Professor of Theory and Simulation of Materials
 
 
 
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Contact

 

+44 (0)20 7594 8154a.mostofi Website

 
 
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Location

 

Bessemer B332Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tepliakov:2023:10.1103/PhysRevLett.130.026401,
author = {Tepliakov, NV and Lischner, J and Kaxiras, E and Mostofi, AA and Pizzochero, M},
doi = {10.1103/PhysRevLett.130.026401},
journal = {Physical Review Letters},
pages = {1--6},
title = {Unveiling and manipulating hidden symmetries in graphene nanoribbons},
url = {http://dx.doi.org/10.1103/PhysRevLett.130.026401},
volume = {130},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Armchair graphene nanoribbons are a highly promising class of semiconductors for all-carbon nanocircuitry. Here, we present a new perspective on their electronic structure from simple model Hamiltonians and ab initio calculations. We focus on a specific set of nanoribbons of width n=3p+2, where n is the number of carbon atoms across the nanoribbon axis and p is a positive integer. We demonstrate that the energy-gap opening in these nanoribbons originates from the breaking of a previously unidentified hidden symmetry by long-ranged hopping of π electrons and structural distortions occurring at the edges. This hidden symmetry can be restored or manipulated through the application of in-plane lattice strain, which enables continuous energy-gap tuning, the emergence of Dirac points at the Fermi level, and topological quantum phase transitions. Our work establishes an original interpretation of the semiconducting character of armchair graphene nanoribbons and offers guidelines for rationally designing their electronic structure.
AU  - Tepliakov,NV
AU  - Lischner,J
AU  - Kaxiras,E
AU  - Mostofi,AA
AU  - Pizzochero,M
DO  - 10.1103/PhysRevLett.130.026401
EP  - 6
PY  - 2023///
SN  - 0031-9007
SP  - 1
TI  - Unveiling and manipulating hidden symmetries in graphene nanoribbons
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.130.026401
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000919680000011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.026401
UR  - http://hdl.handle.net/10044/1/105022
VL  - 130
ER  -
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