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6 p, 1.1 MB |
Transport fingerprints at graphene superlattice Dirac points induced by a boron nitride substrate
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Martínez Gordillo, Rafael (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Ortmann, Frank (Institut Català de Nanociència i Nanotecnologia) ;
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia)
We report peculiar transport fingerprints at the secondary Dirac points created by the interaction between graphene and boron nitride layers. By performing ab initio calculations, the electronic characteristics of the moiré patterns produced by the interaction between layers are first shown to be in good agreement with experimental data, and further used to calibrate the tight-binding model implemented for the transport study. [...]
2014 -  10.1103/PhysRevB.89.161401
Physical review B : Condensed matter and materials physics, Vol. 89, issue 16 (April 2014) , art. 161401
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6 p, 979.5 KB |
Anomalous dissipation mechanism and Hall quantization limit in polycrystalline graphene grown by chemical vapor deposition
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Lafont, F. (Laboratoire National de Métrologie et d'Essais) ;
Ribeiro-Palau, Rebeca (Laboratoire National de Métrologie et d'Essais) ;
Han, Z. (Institut polytechnique de Grenoble. Institut Néel) ;
Cresti, Alessandro (Institut polytechnique de Grenoble. Institute of Microelectronics, Electromagnetism and Photonics) ;
Delvallée, Alexandra (Laboratoire National de Métrologie et d'Essais) ;
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Bouchiat, Vincent (Institut polytechnique de Grenoble. Institut Néel) ;
Ducourtieux, Sebastien (Laboratoire National de Métrologie et d'Essais) ;
Schopfer, F. (Laboratoire National de Métrologie et d'Essais) ;
Poirier, W. (Laboratoire National de Métrologie et d'Essais)
We report on the observation of strong backscattering of charge carriers in the quantum Hall regime of polycrystalline graphene, grown by chemical vapor deposition, which alters the accuracy of the Hall resistance quantization. [...]
2014 - 10.1103/PhysRevB.90.115422
Physical review B : Condensed matter and materials physics, Vol. 90, issue 11 (Sep. 2014) , art. 115422
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40 p, 2.2 MB |
Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
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Avci, Can Onur (Institut Català de Nanociència i Nanotecnologia) ;
Garello, Kevin (Institut Català de Nanociència i Nanotecnologia) ;
Nistor, Corneliu (Institut Català de Nanociència i Nanotecnologia) ;
Godey, Sylvie. (Institut Català de Nanociència i Nanotecnologia) ;
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Barla, Alessandro (Consiglio Nazionale Delle Ricerche. Istituto di Struttura della Materia) ;
Valvidares, Manuel (ALBA Laboratori de Llum de Sincrotró) ;
Pellegrin, Eric. (ALBA Laboratori de Llum de Sincrotró) ;
Ghosh, Abhijit (ETH Zurich. Department of Materials) ;
Miron, Ioan Mihai (SPINTEC) ;
Boulle, Olivier (SPINTEC) ;
Auffret, Stéphane (SPINTEC) ;
Gaudin, Gilles (SPINTEC) ;
Gambardella, Pietro (Institut Català de Nanociència i Nanotecnologia)
We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 °C and characterized using x-ray-absorption spectroscopy, transmission electron microscopy, resistivity, and Hall effect measurements. [...]
2014 - 10.1103/PhysRevB.89.214419
Physical review B : Condensed matter and materials physics, Vol. 89, issue 21 (June 2014) , art. 214419
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22 p, 1.1 MB |
Interdependence between training and magnetization reversal in granular Co-CoO exchange bias systems
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Menéndez Dalmau, Enric (KU Leuven. Instituut voor Kern- en Stralingsfysica) ;
Dias, T. (KU Leuven. Instituut voor Kern- en Stralingsfysica) ;
Geshev, Julian (Instituto de Física, Universidade Federal Do Rio Grande Do sul (UFRGS)) ;
López-Barbera, José Francisco (Institut Català de Nanociència i Nanotecnologia) ;
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia) ;
Steitz, Roland (Helmholtz-Zentrum Berlin für Materialien und Energie GmbH) ;
Kirby, Brian (Brian J.) (National Institute of Standards and Technology (Gaithersburg, Estats Units d'Amèrica)) ;
Borchers, J. A. (National Institute of Standards and Technology (Gaithersburg, Estats Units d'Amèrica)) ;
Pereira, L. M. C. (KU Leuven. Instituut voor Kern- en Stralingsfysica) ;
Vantomme, André (KU Leuven, Instituut voor Kern- en Stralingsfysica) ;
Temst, Kristiaan (KU Leuven, Instituut voor Kern- en Stralingsfysica)
The interdependence between training and magnetization reversal in granular Co-CoO exchange bias (EB) systems prepared by O ion implantation in Co thin films is demonstrated by polarized neutron reflectometry. [...]
2014 - 10.1103/PhysRevB.89.144407
Physical review B : Condensed matter and materials physics, Vol. 89, issue 14 (Sep. 2014) , art. 144407
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10 p, 4.8 MB |
Structure and magnetism of Tm atoms and monolayers on W(110)
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Nistor, Corneliu (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Stepanow, Sebastian (ETH Zürich. Department of Materials) ;
Gambardella, Pietro (Institut Català de Nanociència i Nanotecnologia) ;
Kummer, Kurt (European Synchrotron Radiation Facility) ;
Diez-Ferrer, José Luis (Universidad de Zaragoza. Laboratorio de Microscopias Avanzadas) ;
Coffey, David (Instituto de Ciencia de Materiales de Aragón) ;
De La Fuente, César (Instituto de Ciencia de Materiales de Aragón) ;
Ciria, Miguel (Universidad de Zaragoza. Departamento de Física de la Materia Condensada) ;
Arnaudas, José Ignacio (Universidad de Zaragoza. Departamento de Física de la Materia Condensada)
We investigated the growth and magnetic properties of Tm atoms and monolayers deposited on a W(110) surface using scanning tunneling microscopy and x-ray magnetic circular and linear dichroism. The equilibrium structure of Tm monolayer films is found to be a strongly distorted hexagonal lattice with a Moiré pattern due to the overlap with the rectangular W(110) substrate. [...]
2014 - 10.1103/PhysRevB.90.064423
Physical review B : Condensed matter and materials physics, Vol. 90, issue 6 (Aug. 2014) , art. 64423
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9 p, 1.6 MB |
Impact of synthetic conditions on the anisotropic thermal conductivity of poly(3,4-ethylenedioxythiophene) (PEDOT) : a molecular dynamics investigation
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Cappai, Antonio (University of Cagliari. Department of Physics) ;
Antidormi, Aleandro (Institut Català de Nanociència i Nanotecnologia) ;
Bosin, Andrea (University of Cagliari. Department of Physics) ;
Narducci, Dario (University of Milano-Bicocca. Department of Materials Science) ;
Colombo, Luciano (University of Cagliari. Department of Physics) ;
Melis, Claudio (University of Cagliari. Department of Physics)
In this work we study the effect of different synthetic conditions on thermal transport properties of poly(3,4-ethylenedioxythiophene) (PEDOT) by focusing in particular on the role of proton scavengers. [...]
2020 - 10.1103/PhysRevMaterials.4.035401
Physical review materials, Vol. 4, Issue 3 (March 2020) , art. 35401
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9 p, 1.2 MB |
Segregation scheme of indium in AlGaInAs nanowire shells
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Francaviglia, Luca (École Polytechnique Fédérale de Lausanne) ;
Tütüncüoglu, Gözde (École Polytechnique Fédérale de Lausanne) ;
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia) ;
Di Russo, Enrico (Université de Rouen) ;
Escobar Steinvall, Simon (École Polytechnique Fédérale de Lausanne) ;
Segura Ruiz, Jaime (European Synchrotron Radiation Facility) ;
Potts, Heidi A. (École Polytechnique Fédérale de Lausanne) ;
Friedl, Martin (École Polytechnique Fédérale de Lausanne) ;
Rigutti, Lorenzo (Université de Rouen) ;
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia) ;
Fontcuberta i Morral, Anna (École Polytechnique Fédérale de Lausanne)
Quaternary alloys enable the independent optimization of different semiconductor properties, such as the separate tuning of the band gap and the lattice constant. Nanowire core-shell structures should allow a larger range of compositional tuning as strain can be accommodated in a more effective manner than in thin films. [...]
2019 - 10.1103/PhysRevMaterials.3.023001
Physical review materials, Vol. 3, Issue 2 (February 2019) , art. 23001
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11 p, 2.8 MB |
Field effect enhancement in buffered quantum nanowire networks
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Krizek, Filip (Center for Quantum Devices and Station Q Copenhagen) ;
Sestoft, Joachim E. (Center for Quantum Devices and Station Q Copenhagen) ;
Aseev, Pavel (Delft University of Technology) ;
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia) ;
Vaitiekenas, Saulius (Center for Quantum Devices and Station Q Copenhagen) ;
Casparis, Lucas (Center for Quantum Devices and Station Q Copenhagen) ;
Khan, Sabbir A. (Center for Quantum Devices and Station Q Copenhagen) ;
Liu, Yu (Center for Quantum Devices and Station Q Copenhagen) ;
Stankevič, Tomas (Center for Quantum Devices and Station Q Copenhagen) ;
Whiticar, A. M. (Center for Quantum Devices and Station Q Copenhagen) ;
Fursina, Alexandra (Delft University of Technology) ;
Boekhout, Frenk (QuTech and Netherlands Organization for Applied Scientific Research) ;
Koops, René (QuTech and Netherlands Organization for Applied Scientific Research) ;
Uccelli, Emanuele (QuTech and Netherlands Organization for Applied Scientific Research) ;
Kouwenhoven, Leo P. (Delft University of Technology) ;
Marcus, Charles M. (Center for Quantum Devices and Station Q Copenhagen) ;
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia) ;
Krogstrup, Peter (Center for Quantum Devices and Station Q Copenhagen)
III-V semiconductor nanowires have shown great potential in various quantum transport experiments. However, realizing a scalable high-quality nanowire-based platform that could lead to quantum information applications has been challenging. [...]
2018 - 10.1103/PhysRevMaterials.2.093401
Physical review materials, Vol. 2, Issue 9 (September 2018) , art. 93401
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