NDLI: Rationally Designed Topological Quantum Dots in Bottom-Up Graphene Nanoribbons.

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Rationally Designed Topological Quantum Dots in Bottom-Up Graphene Nanoribbons.

Content Provider	Europe PMC
Author	Rizzo, DanielJ. Jiang, Jingwei Joshi, Dharati Veber, Gregory Bronner, Christopher Durr, Rebecca A. Jacobse, Peter H. Cao, Ting Kalayjian, Alin Rodriguez, Henry Butler, Paul Chen, Ting Louie, Steven G. Fischer, Felix R. Crommie, Michael F.
Copyright Year	2021
Abstract	Bottom-up graphenenanoribbons (GNRs) have recently been shownto host nontrivial topological phases. Here, we report the fabricationand characterization of deterministic GNR quantum dots whose orbitalcharacter is defined by zero-mode states arising from nontrivial topologicalinterfaces. Topological control was achieved through the synthesisand on-surface assembly of three distinct molecular precursors designedto exhibit structurally derived topological electronic states. Usinga combination of low-temperature scanning tunneling microscopy andspectroscopy, we have characterized two GNR topological quantum dotarrangements synthesized under ultrahigh vacuum conditions. Our resultsare supported by density-functional theory and tight-binding calculations,revealing that the magnitude and sign of orbital hopping between topologicalzero-mode states can be tuned based on the bonding geometry of theinterconnecting region. These results demonstrate the utility of topologicalzero modes as components for designer quantum dots and advanced electronicdevices.
ISSN	19360851
Journal	ACS Nano
Volume Number	15
PubMed Central reference number	PMC8717637
Issue Number	12
PubMed reference number	34842409
e-ISSN	1936086X
DOI	10.1021/acsnano.1c09503
Language	English
Publisher	American Chemical Society
Publisher Date	2021-11-29
Access Restriction	Open
Rights License	Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). © 2021 The Authors. Published by American Chemical Society
Subject Keyword	graphene nanoribbons topological materials heterojunctions quantumdots scanning tunnelingmicroscopy scanning tunneling spectroscopy densityfunctional theory
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Physics and Astronomy Engineering Materials Science

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