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11.
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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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12.
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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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13.
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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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14.
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15.
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11 p, 8.7 MB |
Gap anisotropy in multiband superconductors based on multiple scattering theory
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Saunderson, Tom G. (University of Bristol) ;
Annett, James (University of Bristol) ;
Újfalussy, Balázs (Hungarian Academy of Sciences) ;
Csire, Gabor (Institut Català de Nanociència i Nanotecnologia) ;
Gradhand, Martin (University of Bristol)
We implement the Bogoliubov-de Gennes equation in a screened Korringa-Kohn-Rostoker method for solving, self-consistently, the superconducting state for three-dimensional crystals. This method combines the full complexity of the underlying electronic structure and Fermi surface geometry with a simple phenomenological parametrization for the superconductivity. [...]
2020 - 10.1103/PhysRevB.101.064510
Physical review B, Vol. 101, Issue 6 (February 2020) , art. 64510
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16.
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8 p, 572.4 KB |
Quantitative theory of triplet pairing in the unconventional superconductor LaNiGa2
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Ghosh, Sudeep Kumar (University of Kent) ;
Csire, Gabor (Institut Català de Nanociència i Nanotecnologia) ;
Whittlesea, Philip (University of Kent) ;
Annett, James (University of Bristol) ;
Gradhand, Martin (University of Bristol) ;
Újfalussy, Balázs (Hungarian Academy of Sciences) ;
Quintanilla, Jorge (University of Kent)
The exceptionally low-symmetry crystal structures of the time-reversal symmetry-breaking superconductors LaNiC2 and LaNiGa2 lead to an internally antisymmetric nonunitary triplet state as the only possibility compatible with experiments. [...]
2020 - 10.1103/PhysRevB.101.100506
Physical review B, Vol. 101, Issue 10 (March 2020) , art. 100506
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17.
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5 p, 227.7 KB |
Kondo screening of the spin and orbital magnetic moments of Fe impurities in Cu
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Joly, Lilian (Université de Strasbourg) ;
Kappler, J. P. (Synchrotron-SOLEIL) ;
Ohresser, P. (Synchrotron-SOLEIL) ;
Sainctavit, Philippe (Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC)) ;
Henry, Y. (Université de Strasbourg) ;
Gautier, F. (Université de Strasbourg) ;
Schmerber, G. (Université de Strasbourg) ;
Kim, D. J. (University of Warwick) ;
Goyhenex, C. (Université de Strasbourg) ;
Bulou, H. (Université de Strasbourg) ;
Bengone, O. (Université de Strasbourg) ;
Kavich, J. J. (Institut Català de Nanociència i Nanotecnologia) ;
Gambardella, Pietro (ETH Zürich) ;
Scheurer, F. (Université de Strasbourg)
We use x-ray magnetic circular dichroism to evidence the effect of correlations on the local impurity magnetic moment in an archetypal Kondo system, namely, a dilute Cu:Fe alloy. Applying the sum rules on the Fe L2,3 absorption edges, the evolution of the spin and orbital moments across the Kondo temperature are determined separately. [...]
2017 - 10.1103/PhysRevB.95.041108
Physical review B, Vol. 95, Issue 4 (January 2017) , art. 41108
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18.
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6 p, 1.2 MB |
Unequivocal signatures of the crossover to Anderson localization in realistic models of disordered quasi-one-dimensional materials
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López Bezanilla, Alejandro (Los Alamos National Laboratory) ;
Froufe Pérez, Luis S. (University of Fribourg. Department of Physics) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Sáenz, Juan José (IKERBASQUE)
The only unequivocal known criterion for single-parameter scaling Anderson localization relies on the knowledge of the full conductance statistics. To date, theoretical studies have been restricted to model systems with symmetric scatterers, hence lacking universality. [...]
2018 - 10.1103/PhysRevB.98.235423
Physical review B, Vol. 98, Issue 23 (December 2018) , art. 235423
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19.
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8 p, 1.1 MB |
Shubnikov-de Haas oscillations in the anomalous Hall conductivity of Chern insulators
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Canonico, Luis M. (Universidade Federal Fluminense) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Rappoport, Tatiana G. (Universidade Federal Do Rio de Janeiro) ;
Ferreira, Aires (York University. Department of Physics (Toronto, Canadà)) ;
Muniz, R. B. (Universidade Federal Fluminense)
The Haldane model on a honeycomb lattice is a paradigmatic example of a system featuring quantized Hall conductivity in the absence of an external magnetic field, that is, a quantum anomalous Hall effect. [...]
2018 - 10.1103/PhysRevB.98.085409
Physical review B, Vol. 98, Issue 8 (August 2018) , art. 85409
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20.
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7 p, 2.8 MB |
Proximity-induced spin-orbit coupling in graphene/ Bi1.5Sb0.5Te1.7Se1.3 heterostructures
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Jafarpisheh, S. (Peter Grünberg Institute) ;
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ;
Watanabe, Kenji (National Institute for Material Science (Tsukuba, Japan)) ;
Taniguchi, Takashi (National Institute for Material Science (Tsukuba, Japan)) ;
Beschoten, Bernd (RWTH Aachen University) ;
Stampfer, Cristoph (RWTH Aachen University)
The weak intrinsic spin-orbit coupling in graphene can be greatly enhanced by proximity coupling. Here, we report on the proximity-induced spin-orbit coupling in graphene transferred by hexagonal boron nitride (hBN) onto the topological insulator Bi1. [...]
2018 - 10.1103/PhysRevB.98.241402
Physical review B, Vol. 98, Issue 24 (December 2018) , art. 241402
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