Results overview: Found 14 records in 0.02 seconds.
Articles, 14 records found
Articles 14 records found  1 - 10next  jump to record:
1.
9 p, 1.0 MB Tailoring emergent spin phenomena in Dirac material heterostructures / Khokhriakov, Dmitrii (Chalmers University of Technology) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Song, Kenan (Institut Català de Nanociència i Nanotecnologia) ; Vila Tusell, Marc (Institut Català de Nanociència i Nanotecnologia) ; Karpiak, Bogdan (Chalmers University of Technology) ; Dankert, André (Chalmers University of Technology) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Dash, Saroj P. (Chalmers University of Technology)
Dirac materials such as graphene and topological insulators (TIs) are known to have unique electronic and spintronic properties. We combine graphene with TIs in van der Waals heterostructures to demonstrate the emergence of a strong proximity-induced spin-orbit coupling in graphene. [...]
2018 - 10.1126/sciadv.aat9349
Science advances, Vol. 4, Núm. 9 (September 2018) , art. aat9349  
2.
14 p, 1.6 MB Localized electronic states at grain boundaries on the surface of graphene and graphite / Luican-Mayer, Adina (University of Ottawa. Department of Physics) ; Barrios-Vargas, José Eduardo (Institut Català de Nanociència i Nanotecnologia) ; Falkenberg, Jesper Toft (Technical University of Denmark. Department of Micro- and Nanotechnology) ; Autès, Gabriel (Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL)) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Soriano, David (Institut Català de Nanociència i Nanotecnologia) ; Li, Guohong (Rutgers University. Department of Physics and Astronomy) ; Brandbyge, Mads (Technical University of Denmark. Department of Micro- and Nanotechnology) ; Yazyev, Oleg V. (Institute of Physics. Ecole Polytechnique Fédérale de Lausanne (EPFL)) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Yandrei, Eva Y. (Rutgers University. Department of Physics and Astronomy)
Recent advances in large-scale synthesis of graphene and other 2D materials have underscored the importance of local defects such as dislocations and grain boundaries (GBs), and especially their tendency to alter the electronic properties of the material. [...]
2016 - 10.1088/2053-1583/3/3/031005
2D Materials, Vol. 3, Núm. 3 (September 2016) , art. 031005  
3.
8 p, 774.9 KB Spin dynamics and relaxation in graphene dictated by electron-hole puddles / Dinh, Van Tuan (Institut Català de Nanociència i Nanotecnologia) ; Ortmann, Frank (Technische Universität Dresden) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Soriano, David (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
The understanding of spin dynamics and relaxation mechanisms in clean graphene, and the upper time and length scales on which spin devices can operate, are prerequisites to realizing graphene-based spintronic technologies. [...]
2016 - 10.1038/srep21046
Scientific reports, Vol. 6 (2016) , art. 21046  
4.
15 p, 1.0 MB 1D ferromagnetic edge contacts to 2D graphene/h-BN heterostructures / Karpiak, Bogdan (Chalmers University of Technology (Göteborg, Suècia)) ; Dankert, André (Chalmers University of Technology (Göteborg, Suècia)) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Dash, Saroj P. (Chalmers University of Technology (Göteborg, Suècia))
We report the fabrication of one-dimensional (1D) ferromagnetic edge contacts to two-dimensional (2D) graphene/h-BN heterostructures. While aiming to study spin injection/detection with 1D edge contacts, a spurious magnetoresistance signal was observed, which is found to originate from the local Hall effect in graphene due to fringe fields from ferromagnetic edge contacts and in the presence of charge current spreading in the nonlocal measurement configuration. [...]
2018 - 10.1088/2053-1583/aa8d2b
2D Materials, Vol. 5, Núm. 1 (January 2018) , article 14001  
5.
19 p, 1.3 MB Spin hall effect and weak antilocalization in graphene/transition metal dichalcogenide heterostructures / Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We report on a theoretical study of the spin Hall Effect (SHE) and weak antilocalization (WAL) in graphene/transition metal dichalcogenide (TMDC) heterostructures, computed through efficient real-space quantum transport methods, and using realistic tight-binding models parametrized from ab initio calculations. [...]
2017 - 10.1021/acs.nanolett.7b02364
Nano letters, Vol. 17, issue 8 (Sep. 2017) , p. 5078-5083  
6.
6 p, 1.4 MB Effects of dephasing on spin lifetime in ballistic spin-orbit materials / Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We theoretically investigate spin dynamics in spin-orbit-coupled materials. In the ballistic limit, the spin lifetime is dictated by dephasing that arises from energy broadening plus a nonuniform spin precession. [...]
2016 - 10.1103/PhysRevLett.116.086602
Physical review letters, Vol. 116, issue 8 (Feb. 2016) , art. 86602  
7.
12 p, 1.1 MB Large spin relaxation anisotropy and valley-Zeeman spin-orbit coupling in WSe2 /graphene/ h -BN heterostructures / Zihlmann, Simon (Universität Basel. Department of Physics) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Kedves, Máté (Budapesti Müszaki és Gazdaságtudományi Egyetem.Department of Physics) ; Watanabe, Kenji (National Institute for Material Science (Tsukuba, Japan)) ; Taniguchi, Takashi (National Institute for Material Science (Tsukuba, Japan)) ; Schönenberger, Christian (Universität Basel. Department of Physics) ; Makk, Péter (Universität Basel. Department of Physics)
Large spin-orbital proximity effects have been predicted in graphene interfaced with a transition-metal dichalcogenide layer. Whereas clear evidence for an enhanced spin-orbit coupling has been found at large carrier densities, the type of spin-orbit coupling and its relaxation mechanism remained unknown. [...]
2018 - 10.1103/PhysRevB.97.075434
Physical review B, Vol. 97, issue 7 (Feb. 2018) , p. 75434  
8.
17 p, 3.3 MB Grain boundary-induced variability of charge transport in hydrogenated polycrystalline graphene / Barrios-Vargas, José Eduardo (Institut Català de Nanociència i Nanotecnologia) ; Falkenberg, Jesper Toft (Technical University of Denmark. Department of Micro- and Nanotechnology) ; Soriano, David (Institut Català de Nanociència i Nanotecnologia) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Brandbyge, Mads (Technical University of Denmark. Department of Micro- and Nanotechnology) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Chemical functionalization has proven to be a promising means of tailoring the unique properties of graphene. For example, hydrogenation can yield a variety of interesting effects, including a metal-insulator transition or the formation of localized magnetic moments. [...]
2017 - 10.1088/2053-1583/aa59de
2D Materials, Vol. 4, Núm. 2 (June 2017) , article 25009  
9.
9 p, 997.0 KB Giant spin lifetime anisotropy in graphene induced by proximity effects / Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Fabian, Jaroslav (Universität Regensburg. Insitute for Theoretical Physics) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We report on fundamental aspects of spin dynamics in heterostructures of graphene and transition metal dichalcogenides (TMDCs). By using realistic models derived from first principles we compute the spin lifetime anisotropy, defined as the ratio of lifetimes for spins pointing out of the graphene plane to those pointing in the plane. [...]
2017 - 10.1103/PhysRevLett.119.206601
Physical review letters, Vol. 119 issue 20 (Nov. 2017) , p. 206601  
10.
7 p, 1.1 MB Near-field photocurrent nanoscopy on bare and encapsulated graphene / Woessner, Achim (Institut de Ciències Fotòniques (Castelldefels)) ; Alonso-González, Pablo (Chinese Academy of Science. Institute of Physics (Beijing)) ; Lundeberg, Mark B. (Institut de Ciències Fotòniques (Castelldefels)) ; Gao, Yuanda (Columbia University) ; Barrios-Vargas, José Eduardo (Institut Català de Nanociència i Nanotecnologia) ; Navickaite, Gabriele (Institut de Ciències Fotòniques (Castelldefels)) ; Ma, Qiong (Massachusetts Institute of Technology. Department of Physics) ; Janner, Davide (Institut de Ciències Fotòniques (Castelldefels)) ; Watanabe, Kenji (National Institute for Materials Science (Tsukuba, Japó)) ; Cummings, Aron W. (Institut Català de Nanociència i Nanotecnologia) ; Taniguchi, Takashi (National Institute for Materials Science (Tsukuba, Japó)) ; Pruneri, Valerio (Institut de Ciències Fotòniques (Castelldefels)) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Jarillo-Herrero, Pablo (Massachusetts Institute of Technology. Department of Physics) ; Hone, James (Columbia University. Department of Mechanical Engineering) ; Hillenbrand, Rainer (CIC nanoGUNE (Sant Sebastià, País Basc)) ; Koppens, Frank H.L. (Institut de Ciències Fotòniques (Castelldefels))
Optoelectronic devices utilizing graphene have demonstrated unique capabilities and performances beyond state-of-the-art technologies. However, requirements in terms of device quality and uniformity are demanding. [...]
2016 - 10.1038/ncomms10783
Nature Communications, Vol. 7 (February 2016) , article 10783  

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