UAB Digital Repository of Documents 50 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
1.
30 p, 3.1 MB Origin of large negative electrocaloric effect in antiferroelectric PbZr O3 / Vales Castro, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Faye, Romain (Luxembourg Institute of Science and Technology. Materials Research and Technology Department) ; Vellvehi, Miquel (Institut de Microelectrònica de Barcelona) ; Nouchokgwe, Youri (University of Luxembourg) ; Perpiñà, Xavier (Institut de Microelectrònica de Barcelona) ; Caicedo Roque, Jose Manuel (Institut Català de Nanociència i Nanotecnologia) ; Jordà, Xavier (Institut de Microelectrònica de Barcelona) ; Roleder, Krystian (University of Silesia in Katowice. Institute of Physics) ; Kajewski, Dariusz (University of Silesia in Katowice. Institute of Physics) ; Perez-Tomas, Amador (Institut Català de Nanociència i Nanotecnologia) ; Defay, Emmanuel (Luxembourg Institute of Science and Technology. Materials Research and Technology Department) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
We have studied the electrocaloric response of the archetypal antiferroelectric PbZrO3 as a function of voltage and temperature in the vicinity of its antiferroelectric-paraelectric phase transition. [...]
2021 - 10.1103/PhysRevB.103.054112
Physical review B, Vol. 103 Núm. 5 (Feb. 2021) , art. 54112  
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) ; García, José Hugo (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  
3.
18 p, 7.5 MB Graphene on two-dimensional hexagonal BN, AlN, and GaN : electronic, spin-orbit, and spin relaxation properties / Zollner, Klaus (University of Regensburg. Institute for Theoretical Physics) ; Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Fabian, Jaroslav (University of Regensburg. Institute for Theoretical Physics)
We investigate the electronic band structure of graphene on a series of two-dimensional hexagonal nitride insulators hXN, X=B, Al, and Ga, with first-principles calculations. A symmetry-based model Hamiltonian is employed to extract orbital parameters and spin-orbit coupling (SOC) from the low-energy Dirac bands of the proximitized graphene. [...]
2021 - 10.1103/PhysRevB.103.075129
Physical review B, Vol. 103, issue 7 (Feb. 2021) , art. 75129  
4.
8 p, 458.3 KB Emergence of intra-particle entanglement and time-varying violation of Bell's inequality in Dirac matter / De Moraes, Bruna Gabrielly (Universitat Autònoma de Barcelona. Departament de Física) ; Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We demonstrate the emergence and dynamics of intraparticle entanglement in massless Dirac fermions. This entanglement, generated by spin-orbit coupling, arises between the spin and sublattice pseudospin of electrons in graphene. [...]
2020 - 10.1103/PhysRevB.102.041403
Physical review B, Vol. 102, issue 4 (Jul. 2020) , art. 041403  
5.
6 p, 1.1 MB Transport fingerprints at graphene superlattice Dirac points induced by a boron nitride substrate / 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  
6.
7 p, 981.7 KB Anisotropic behavior of quantum transport in graphene superlattices : coexistence of ballistic conduction with Anderson insulating regime / Pedersen, Jesper Goor (Institut Català de Nanociència i Nanotecnologia) ; Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We report on the possibility to generate highly anisotropic quantum conductivity in disordered graphene-based superlattices. Our quantum simulations, based on an efficient real-space implementation of the Kubo-Greenwood formula, show that in disordered graphene superlattices the strength of multiple scattering phenomena can strongly depend on the transport measurement geometry. [...]
2014 - 10.1103/PhysRevB.89.165401
Physical review B : Condensed matter and materials physics, Vol. 89, issue 16 (April 2014) , art. 165401  
7.
6 p, 979.5 KB Anomalous dissipation mechanism and Hall quantization limit in polycrystalline graphene grown by chemical vapor deposition / 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  
8.
40 p, 2.2 MB Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers / 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, Stephane (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  
9.
22 p, 1.1 MB Interdependence between training and magnetization reversal in granular Co-CoO exchange bias systems / 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  
10.
10 p, 4.8 MB Structure and magnetism of Tm atoms and monolayers on W(110) / 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 I. (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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