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Dipòsit Digital de Documents de la UAB 11 registres trobats  1 - 10següent  anar al registre: La cerca s'ha fet en 0.01 segons. 
1.
5 p, 656.4 KB Have mysterious topological valley currents been observed in graphene superlattices? / Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Power, Stephen R. (Trinity College Dublin. School of Physics) ; Nikolić, Branislav K. (University of Delaware. Department of Physics and Astronomy) ; Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Technical University of Denmark. Center for Nanostructured Graphene)
We provide a critical discussion concerning the claim of topological valley currents, driven by a global Berry curvature and valley Hall effect proposed in recent literature. After pointing out a major inconsistency of the theoretical scenario proposed to interpret giant nonlocal resistance, we discuss various possible alternative explanations and open directions of research to solve the mystery of nonlocal transport in graphene superlattices.
2022 - 10.1088/2515-7639/ac452a
JPhys materials, Vol. 5, issue 2 (April 2022) , art. 21001  
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2.
7 p, 5.2 MB Valley Hall effect and nonlocal resistance in locally gapped graphene / Aktor, Thomas (Technical University of Denmark. Center for Nanostructured Graphene) ; Garcia, José H (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Technical University of Denmark. Center for Nanostructured Graphene) ; Power, Stephen R. (Trinity College Dublin. School of Physics)
We report on the emergence of bulk, valley-polarized currents in graphene-based devices, driven by spatially varying regions of broken sublattice symmetry, and revealed by nonlocal resistance (RNL) fingerprints. [...]
2021 - 10.1103/PhysRevB.103.115406
Physical review B, Vol. 103, issue 11 (March 2021) , art. 115406  
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3.
13 p, 895.2 KB Charge and spin transport anisotropy in nanopatterned graphene / Gregersen, Søren Schou (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia)
Anisotropic electronic transport is a possible route towards nanoscale circuitry design, particularly in two-dimensional materials. Proposals to introduce such a feature in patterned graphene have to date relied on large-scale structural inhomogeneities. [...]
2018 - 10.1088/2515-7639/aadca3
JPhys materials, Vol. 1, Núm. 1 (September 2018) , art. 015005  
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4.
34 p, 4.0 MB Gate electrostatics and quantum capacitance in ballistic graphene devices / Caridad, José M. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Shylau, Artsem A. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Gammelgaard, Lene (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Bøggild, Peter (Danmarks Tekniske Universitet. Center for Nanostructured Graphene)
We experimentally investigate the charge induction mechanism across gated, narrow, ballistic graphene devices with different degrees of edge disorder. By using magnetoconductance measurements as the probing technique, we demonstrate that devices with large edge disorder exhibit a nearly homogeneous capacitance profile across the device channel, close to the case of an infinitely large graphene sheet. [...]
2019 - 10.1103/PhysRevB.99.195408
Physical review B, Vol. 99, issue 19 (May 2019) , art. 195408  
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5.
15 p, 790.9 KB Probing the nanoscale origin of strain and doping in graphene-hBN heterostructures / Vincent, Tom (National Physical Laboratory (United Kingdom)) ; Panchal, Vishal (Bruker Nano Surfaces) ; Booth, Timothy J. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Antonov, Vladimir (University of London. Royal Holloway) ; Kazakova, Olga (National Physical Laboratory (United Kingdom))
We use confocal Raman microscopy and a recently proposed vector analysis scheme to investigate the nanoscale origin of strain and carrier concentration in exfoliated graphene-hexagonal boron nitride (hBN) heterostructures on silicon dioxide (SiO). [...]
2019 - 10.1088/2053-1583/aaf1dc
2D Materials, Vol. 6, issue 1 (Jan. 2019) , art. 15022  
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6.
6 p, 1.4 MB Ballistic tracks in graphene nanoribbons / Aprojanz, Johannes (Technische Universität Chemnitz. Institut für Physik) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Bampoulis, Pantelis (Leibniz Universität Hannover. Institut für Festkörperphysik) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Zandvliet, Harold J. W. (University of Twente. Physics of Interfaces and Nanomaterials) ; Zakharov, Alexei A. (Lund University. MAX IV Laboratory) ; Tegenkamp, C. (Institut für Festkörperphysik. Leibniz Universität Hannover)
High quality graphene nanoribbons epitaxially grown on the sidewalls of silicon carbide (SiC) mesa structures stand as key building blocks for graphene-based nanoelectronics. Such ribbons display 1D single-channel ballistic transport at room temperature with exceptionally long mean free paths. [...]
2018 - 10.1038/s41467-018-06940-5
Nature communications, Vol. 9 (October 2018) , art. 4426  
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7.
6 p, 1.3 MB Conductance quantization suppression in the quantum Hall regime / Caridad, José M. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Lotz, Mikkel R. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Shylau, Artsem A. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Thomsen, Joachim D. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Gammelgaard, Lene (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Booth, Timothy J. (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Bøggild, Peter (Danmarks Tekniske Universitet. Center for Nanostructured Graphene)
Conductance quantization is the quintessential feature of electronic transport in non-interacting mesoscopic systems. This phenomenon is observed in quasi one-dimensional conductors at zero magnetic field B, and the formation of edge states at finite magnetic fields results in wider conductance plateaus within the quantum Hall regime. [...]
2018 - 10.1038/s41467-018-03064-8
Nature communications, Vol. 9 (February 2018) , art. 659  
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8.
9 p, 1.1 MB Quantum transport in graphene in presence of strain-induced pseudo-Landau levels / Settnes, Mikkel (Danmarks Tekniske Universitet. Department of Photonics Engineering) ; Leconte, Nicolas (Institut Català de Nanociència i Nanotecnologia) ; Barrios Vargas, José Eduardo (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Department of Photonics Engineering) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Wereport on mesoscopic transport fingerprints in disordered graphene caused by strain-field induced pseudomagnetic Landau levels (pLLs). Efficient numerical real space calculations of the Kubo formula are performed for an ordered network of nanobubbles in graphene, creating pseudomagnetic fields up to several hundreds of Tesla, values inaccessible by real magnetic fields. [...]
2016 - 10.1088/2053-1583/3/3/034005
2D Materials, Vol. 3, issue 3 (Jan. 2016) , art. 34005  
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9.
14 p, 2.2 MB Electron trajectories and magnetotransport in nanopatterned graphene under commensurability conditions / Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Thomsen, Morten Rishøj (Aalborg Universitet. Department of Physics and Nanotechnology) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Pedersen, Thomas Garm (Aalborg Universitet. Department of Physics and Nanotechnology)
Commensurability oscillations in the magnetotransport of periodically patterned systems, emerging from the interplay of cyclotron orbit and pattern periodicity, are a benchmark of mesoscopic physics in electron gas systems. [...]
2017 - 10.1103/PhysRevB.96.075425
Physical review B, Vol. 96, issue 7 (Aug. 2017) , p. 75425  
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10.
10 p, 3.6 MB Nanostructured graphene for spintronics / Gregersen, Søren Schou (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene)
Zigzag edges of the honeycomb structure of graphene exhibit magnetic polarization, making them attractive as building blocks for spintronic devices. Here, we show that devices with zigzag-edged triangular antidots perform essential spintronic functionalities, such as spatial spin splitting or spin filtering of unpolarized incoming currents. [...]
2017 - 10.1103/PhysRevB.95.121406
Physical review B, Vol. 95, issue 12 (March 2017) , art. 121406  
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Dipòsit Digital de Documents de la UAB : 11 registres trobats   1 - 10següent  anar al registre:
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