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Akademický článek

Manipulation of magnetization and spin transport in hydrogenated graphene with THz pulses

Autor: Jakob Kjærulff Svaneborg, Aleksander Bach Lorentzen, Fei Gao, Antti-Pekka Jauho, Mads Brandbyge

Publikováno v: Frontiers in Physics, Vol 11 (2023)

Terahertz (THz) field pulses can now be applied in scanning tunneling microscopy (THz-STM) junction experiments to study time-resolved dynamics. The relatively slow pulse compared to the typical electronic time-scale calls for approximations based on

Externí odkaz: https://doaj.org/article/47ae0e4a35784eaab23e85511a254bdc

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Akademický článek

Quantum surface-response of metals revealed by acoustic graphene plasmons

Autor: P. A. D. Gonçalves, Thomas Christensen, Nuno M. R. Peres, Antti-Pekka Jauho, Itai Epstein, Frank H. L. Koppens, Marin Soljačić, N. Asger Mortensen

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)

Knowledge of the quantum response of materials is essential for designing light–matter interactions at the nanoscale. Here, the authors report a theory for understanding the impact of metallic quantum response on acoustic graphene plasmons and how

Externí odkaz: https://doaj.org/article/8b6111c48bc944efa63f13d1d1f502e2

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Akademický článek

Plasmon–emitter interactions at the nanoscale

Autor: P. A. D. Gonçalves, Thomas Christensen, Nicholas Rivera, Antti-Pekka Jauho, N. Asger Mortensen, Marin Soljačić

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020)

Plasmonic enhancements of light–matter interactions are generally maximal at short emitter–surface separations. Here, the authors investigate the impact of nonlocality, spill-out, and surface-assisted Landau damping at nanoscale separations using

Externí odkaz: https://doaj.org/article/a3c89547cbff40aeb695f94b09a2adc4

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Akademický článek

Ballistic tracks in graphene nanoribbons

Autor: Johannes Aprojanz, Stephen R. Power, Pantelis Bampoulis, Stephan Roche, Antti-Pekka Jauho, Harold J. W. Zandvliet, Alexei A. Zakharov, Christoph Tegenkamp

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)

Electronic highways were realized by means of epitaxially grown graphene nanoribbons on SiC substrates. Here, the authors use spatially-resolved two-point probe and conductive AFM measurements, supplemented by tight-binding calculations, to image the

Externí odkaz: https://doaj.org/article/a8438a0cd2bb455a8cee23aad923eb5c

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Akademický článek

Conductance quantization suppression in the quantum Hall regime

Autor: José M. Caridad, Stephen R. Power, Mikkel R. Lotz, Artsem A. Shylau, Joachim D. Thomsen, Lene Gammelgaard, Timothy J. Booth, Antti-Pekka Jauho, Peter Bøggild

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)

Conductance quantization is the hallmark of non-interacting confined systems. The authors show that the quantization in graphene nanoconstrictions with low edge disorder is suppressed in the quantum Hall regime. This is explained by the addition of n

Externí odkaz: https://doaj.org/article/1f1c0bf8dc194e2580c65fc9df057d0e

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Nanoscale View of Engineered Massive Dirac Quasiparticles in Lithographic Superstructures

Autor: Alfred J. H. Jones, Lene Gammelgaard, Mikkel O. Sauer, Deepnarayan Biswas, Roland J. Koch, Chris Jozwiak, Eli Rotenberg, Aaron Bostwick, Kenji Watanabe, Takashi Taniguchi, Cory R. Dean, Antti-Pekka Jauho, Peter Bøggild, Thomas G. Pedersen, Bjarke S. Jessen, Søren Ulstrup

Publikováno v: Jones, A J H, Gammelgaard, L, Sauer, M O, Biswas, D, Koch, R J, Jozwiak, C, Rotenberg, E, Bostwick, A, Watanabe, K, Taniguchi, T, Dean, C R, Jauho, A P, Bøggild, P, Pedersen, T G, Jessen, B S & Ulstrup, S 2022, ' Nanoscale View of Engineered Massive Dirac Quasiparticles in Lithographic Superstructures ', ACS Nano, vol. 16, no. 11, pp. 19354-19362 . https://doi.org/10.1021/acsnano.2c08929

Massive Dirac fermions are low-energy electronic excitations characterized by a hyperbolic band dispersion. They play a central role in several emerging physical phenomena such as topological phase transitions, anomalous Hall effects and superconduct

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::425062119f297c35209c1cf3b9f2fc06
https://doi.org/10.1021/acsnano.2c08929

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Akademický článek

Moiré effects in graphene-hBN heterostructures

Autor: Yongping Du, Ning Xu, Xianqing Lin, Antti-Pekka Jauho

Publikováno v: Physical Review Research, Vol 2, Iss 4, p 043427 (2020)

Encapsulating graphene in hexagonal boron nitride (hBN) has several advantages: The highest mobilities reported to date are achieved in this way, and precise nanostructuring of graphene becomes feasible through the protective hBN layers. Nevertheless

Externí odkaz: https://doaj.org/article/a04c9c477156425fa87fffbf814df87a

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Akademický článek

Josephson effect in graphene bilayers with adjustable relative displacement

Autor: Mohammad Alidoust, Antti-Pekka Jauho, Jaakko Akola

Publikováno v: Physical Review Research, Vol 2, Iss 3, p 032074 (2020)

The Josephson current is investigated in a superconducting graphene bilayer where pristine graphene sheets can make in-plane or out-of-plane displacements with respect to each other. The superconductivity can be of an intrinsic nature, or due to a pr

Externí odkaz: https://doaj.org/article/a5acd738da10470f8d44d5c1a002481f

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Quantum surface-response of metals revealed by acoustic graphene plasmons

Autor: Itai Epstein, Antti-Pekka Jauho, Marin Soljacic, Thomas Højlund Christensen, Nuno M. R. Peres, Frank H. L. Koppens, Paulo André Dias Gonçalves, N. Asger Mortensen

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Nature Communications
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Gonçalves, P A D, Christensen, T, Peres, N M R, Jauho, A P, Epstein, I, Koppens, F H L, Soljačić, M & Mortensen, N A 2021, ' Quantum surface-response of metals revealed by acoustic graphene plasmons ', Nature Communications, vol. 12, no. 1, 3271 . https://doi.org/10.1038/s41467-021-23061-8
Gonçalves, P A D, Christensen, T, Peres, N M R, Jauho, A-P, Epstein, I, Koppens, F H L, Soljačić, M & Mortensen, N A 2021, ' Quantum surface-response of metals revealed by acoustic graphene plasmons ', Nature Communications, vol. 12, no. 1, 3271 . https://doi.org/10.1038/s41467-021-23061-8

A quantitative understanding of the electromagnetic response of materials is essential for the precise engineering of maximal, versatile, and controllable light-matter interactions. Material surfaces, in particular, are prominent platforms for enhanc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44060a9e9beafb7d6226d1f8247b6c4c
https://doaj.org/article/8b6111c48bc944efa63f13d1d1f502e2

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Akademický článek

Electronic and transport properties of kinked graphene

Autor: Jesper Toft Rasmussen, Tue Gunst, Peter Bøggild, Antti-Pekka Jauho, Mads Brandbyge

Publikováno v: Beilstein Journal of Nanotechnology, Vol 4, Iss 1, Pp 103-110 (2013)

Local curvature, or bending, of a graphene sheet is known to increase the chemical reactivity presenting an opportunity for templated chemical functionalisation. Using first-principles calculations based on density functional theory (DFT), we investi

Externí odkaz: https://doaj.org/article/c4e8e1fb40b94b89a69dbbb67c85db11

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