Resultats globals: 9 registres trobats en 0.02 segons.
Articles, 8 registres trobats
Documents de recerca, 1 registres trobats
Articles 8 registres trobats  
1.
10 p, 5.6 MB Experimental Demonstration of a Magnetically Induced Warping Transition in a Topological Insulator Mediated by Rare-Earth Surface Dopants / Muñiz Cano, Beatriz (IMDEA Nanociencia) ; Ferreiros, Yago (IMDEA Nanociencia) ; Pantaleón, Pierre A. (IMDEA Nanociencia) ; Dai, Ji (ALBA Laboratori de Llum de Sincrotró) ; Tallarida, Massimo (ALBA Laboratori de Llum de Sincrotró) ; Figueroa García, Adriana Isabel (Institut Català de Nanociència i Nanotecnologia) ; Marinova, Vera (Institute of Optical Materials and Technologies Acad. G. Bontchev) ; García-Díez, Kevin (Institut Català de Nanociència i Nanotecnologia) ; Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ; Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia) ; Miranda, Rodolfo (Universidad Autónoma de Madrid) ; Camarero, Julio (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada) ; Guinea, Francisco (IMDEA Nanociencia) ; Silva-Guillén, Jose Angel (IMDEA Nanociencia) ; Valbuena, Miguel Ángel (IMDEA Nanociencia)
Magnetic topological insulators constitute a novel class of materials whose topological surface states (TSSs) coexist with long-range ferromagnetic order, eventually breaking time-reversal symmetry. The subsequent bandgap opening is predicted to co-occur with a distortion of the TSS warped shape from hexagonal to trigonal. [...]
2023 - 10.1021/acs.nanolett.3c00587
Nano letters, Vol. 23, Issue 13 (July 2023) , p. 6249-6258  
2.
18 p, 4.7 MB Quasiparticle spectra of 2H-NbSe2 : two-band superconductivity and the role of tunneling selectivity / Noat, Y. (Institut des Nanosciences de Paris) ; Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ; Cren, T. (Institut des Nanosciences de Paris) ; Cherkez, V. (Institut des Nanosciences de Paris) ; Brun, C. (Institut des Nanosciences de Paris) ; Pons, S. (Institut des Nanosciences de Paris) ; Debontridder, F. (Institut des Nanosciences de Paris) ; Roditchev, D. (Institut des Nanosciences de Paris) ; Sacks, W. (Université Paris 6) ; Cario, L. (Institut des Matériaux Jean Rouxel) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Garcia, Alberto (Institut de Ciència de Materials de Barcelona) ; Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona)
We have studied the superconducting state of 2H-NbSe2 by scanning tunneling spectroscopy along two different crystal orientations, the c and the a/b axes. Along the c axis a large gap is dominant in the spectra, while a smaller gap is measured along the a/b axis. [...]
2015 - 10.1103/PhysRevB.92.134510
Physical review B : Condensed matter and materials physics, Vol. 92, Issue 13 (October 2015) , art. 134510  
3.
8 p, 1.5 MB Tunneling and electronic structure of the two-gap superconductor MgB2 / Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ; Noat, Y. (Institut des Nanosciences de Paris) ; Cren, T. (Institut des Nanosciences de Paris) ; Sacks, W. (Institut des Nanosciences de Paris) ; Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
A combined experimental (superconductor-insulator-superconductor tunneling spectra) and theoretical (density functional theory) study of the two-gap superconductor MgB2 is reported. The calculations confirm that the small gap is associated with a π band mostly based on the boron pz orbitals leading to the three-dimensional band component of the Fermi surface. [...]
2015 - 10.1103/PhysRevB.92.064514
Physical review B : Condensed matter and materials physics, Vol. 92, Issue 6 (August 2015) , art. 64514  
4.
14 p, 2.2 MB Anisotropic features in the electronic structure of the two-dimensional transition metal trichalcogenide TiS3 : electron doping and plasmons / Silva-Guillén, Jose Angel (Fundación IMDEA Nanociencia) ; Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Guinea, Francisco (University of Manchester. Department of Physics and Astronomy) ; Roldan, Rafael (Instituto de Ciencia de Materiales de Madrid)
Analysis of the band structure of TiS single-layers suggests the possibility of changing their physical behaviour by injecting electron carriers. The anisotropy of the valence and conduction bands is explained in terms of their complex orbital composition. [...]
2017 - 10.1088/2053-1583/aa6b92
2D Materials, Vol. 4, Núm. 2 (June 2017) , art. 25085  
5.
16 p, 836.4 KB Coexistence of elastic modulations in the charge density wave state of 2H-NbSe₂ / Guster, Bogdan (Institut Català de Nanociència i Nanotecnologia) ; Rubio Verdú, Carmen (CIC NanoGUNE700) ; Robles, Roberto (Institut Català de Nanociència i Nanotecnologia) ; Zaldívar, Javier (CIC NanoGUNE) ; Dreher, Paul (Donostia International Physics Center) ; Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia) ; Silva-Guillén, Jose Angel (Wuhan University. School of Physics and Technology) ; Choi, Deung-Jang (Donostia International Physics Center) ; Pascual, José I. (CIC NanoGUNE) ; Ugeda, Miguel M. (CIC NanoGUNE) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona)
Bulk and single-layer 2H-NbSe₂ exhibit identical charge density wave order (CDW) with a quasi-commensurate 3 × 3 superlattice periodicity. Here we combine scanning tunnelling microscopy (STM) imaging at T = 1 K of 2H-NbSe₂ with first-principles density functional theory (DFT) calculations to investigate the structural atomic rearrangement of this CDW phase. [...]
2019 - 10.1021/acs.nanolett.9b00268
Nano letters, Vol. 19, issue 5 (May 2019) , p. 3027-3032  
6.
10 p, 331.0 KB Electronic properties of single-layer and multilayer transition metal dichalcogenides MX₂ (M = Mo, W and X = S, Se) / Roldan, Rafael (Instituto de Ciencia de Materiales de Madrid) ; Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ; López-Sancho, M. Pilar (Instituto de Ciencia de Materiales de Madrid) ; Guinea, Francisco (Instituto de Ciencia de Materiales de Madrid) ; Cappelluti, Emmanuele (Consiglio Nazionale delle Ricerche. Istituto de Sistemi Complessi) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
Single- and few-layer transition metal dichalcogenides have recently emerged as a new family of layered crystals with great interest, not only from the fundamental point of view, but also because of their potential application in ultrathin devices. [...]
2014 - 10.1002/andp.201400128
Annalen der Physik, Vol. 526, issue 9-10 (Oct. 2014) , p. 347-357  
7.
13 p, 2.2 MB Momentum dependence of spin-orbit interaction effects in single-layer and multi-layer transition metal dichalcogenides / Roldan, Rafael (Instituto de Ciencia de Materiales de Madrid) ; López Sancho, M. Pilar (Instituto de Ciencia de Materiales de Madrid) ; Guinea, Francisco (Instituto de Ciencia de Materiales de Madrid) ; Cappelluti, Emmanuele (Istituto de Sistemi Complessi) ; Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
One of the main characteristics of the new family of two-dimensional crystals of semiconducting transition metal dichalcogenides (TMDs) is the strong spin-orbit interaction, which makes them very promising for future applications in spintronics and valleytronics devices. [...]
2014 - 10.1088/2053-1583/1/3/034003
2D Materials, Vol. 1, Núm. 3 (December 2014) , art. 34003  
8.
11 p, 3.4 MB Electronic structure of 2H-NbSe₂ single-layers in the CDW state / Silva-Guillén, Jose Angel (Fundación IMDEA Nanociencia) ; Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ; Guinea, Francisco (Fundación IMDEA Nanociencia) ; Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona)
Adensity functional theory study of NbSe₂"Qsingle-layers in the normal non-modulated and the 3xQ3 CDW states is reported. Weshow that, in the single layer, the CDW barely affects the Fermi surface of the system, thus ruling out a nesting mechanism as the driving force for the modulation. [...]
2016 - 10.1088/2053-1583/3/3/035028
2D Materials, Vol. 3, no. 3 (Sep. 2016) , art. 35028  

Documents de recerca 1 registres trobats  
1.
133 p, 4.0 MB Theoretical study of the electronic properties of 2D materials / Silva Guillén, Jose Angel ; Ordejon, Pablo, dir. ; Canadell Casanova, Enric, 1950-, dir. ; Alonso Pruneda, José Miguel ; Universitat Autònoma de Barcelona. Departament de Física
Los materiales 2D han sido estudiados desde hace mucho tiempo. Recientemente, desde el descubrimiento del grafeno en 2004 por los premios Nobel A. Geim y K. Novoselov, este tipo de materiales recibió atención de nuevo por parte de la comunidad científica. [...]
Two-dimensional materials have been studied since long time ago. Recently, after the dis- covery of graphene in 2004 by Nobel prizes A. Geim and K. Novoselov, a renewed interest in this kind of materials arose in the scienti c community. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2015  

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