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Andreas Uppstu
Researcher at Aalto University
Publications - 19
Citations - 787
Andreas Uppstu is an academic researcher from Aalto University. The author has contributed to research in topics: Graphene & Graphene nanoribbons. The author has an hindex of 13, co-authored 19 publications receiving 719 citations. Previous affiliations of Andreas Uppstu include Helsinki Institute of Physics & Helsinki University of Technology.
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Suppression of electron–vibron coupling in graphene nanoribbons contacted via a single atom
Joost van der Lit,Mark P. Boneschanscher,Daniel Vanmaekelbergh,Mari Ijäs,Andreas Uppstu,Mikko M. Ervasti,Ari Harju,Peter Liljeroth,Ingmar Swart +8 more
TL;DR: It is found that creating well-defined contacts can suppress inelastic transport channels in graphene nanostructures and significantly influences the charge transport through the graphene nanoribbon but does not affect its electronic structure.
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Generalized tight-binding transport model for graphene nanoribbon-based systems
TL;DR: In this article, an extended tight-binding model that includes up to third-nearest-neighbor hopping and a Hubbard mean-field interaction term is tested against ab initio local spin-density approximation results of band structures for armchair-and zigzag-edged graphene nanoribbons.
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Quantum confined electronic states in atomically well-defined graphene nanostructures
Sampsa K. Hämäläinen,Zhixiang Sun,Mark P. Boneschanscher,Andreas Uppstu,Mari Ijäs,Ari Harju,Daniel Vanmaekelbergh,Peter Liljeroth,Peter Liljeroth +8 more
TL;DR: GQDs with well-defined edges in the zigzag direction are studied, grown by chemical vapor deposition on an Ir(111) substrate by low-temperature scanning tunneling microscopy and spectroscopy and the observed states are analogous to the solutions of the textbook "particle-in-a-box" problem applied to relativistic massless fermions.
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Electronic states at the graphene-hexagonal boron nitride zigzag interface.
Robert Drost,Andreas Uppstu,Fabian Schulz,Sampsa K. Hämäläinen,Mikko M. Ervasti,Ari Harju,Peter Liljeroth +6 more
TL;DR: This work proposes the ZZ-terminated, atomically sharp interfaces between graphene and hexagonal boron nitride (BN) as experimentally realizable, chemically stable model systems for graphene ZZ edges and shows them to host localized electronic states similar to those on the pristine graphene Z Z edge.
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Electronic states in finite graphene nanoribbons: Effect of charging and defects
Mari Ijäs,Mikko M. Ervasti,Andreas Uppstu,Peter Liljeroth,J. van der Lit,Ingmar Swart,Ari Harju +6 more
TL;DR: In this paper, the electronic structure of finite armchair graphene nanoribbons using density-functional theory and the Hubbard model was studied, focusing on the states localized at the zigzag termini.