Publications de Gabriel Albert Autes

Origin of large magnetoresistance in the topological nonsymmorphic semimetal TaSe3

Jean-Philippe Ansermet, Oleg Yazyev, Quansheng Wu, Shengnan Zhang, Daniel Gosalbez Martinez, Michele Puppin, Helmuth Berger, Alberto Crepaldi, Gabriel Albert Autes, Gianmarco Gatti

TaSe3 is a layered van der Waals semimetal with several inverted band gaps throughout the entire Brillouin zone and nontrivial Z(2) topological indices, which place it at the boundary between a strong and a weak topological phase. Our transport experiments ...

2021

Dynamic media content categorisation method

Sabine Süsstrunk, Mahmut Sami Arpa, Gabriel Albert Autes

The present invention concerns a method of classifying a media item into a user profile suitability class in a classification system comprising a set of pre-trained artificial neural networks. The method comprising: receiving (101) a media file; extracting ...

2020

Topological Fermi-arc surface resonances in bcc iron

Oleg Yazyev, Daniel Gosalbez Martinez, Gabriel Albert Autes

The topological classification of matter has been extended to include semimetallic phases characterized by the presence of topologically protected band degeneracies. In Weyl semimetals, the foundational gapless topological phase, chiral degeneracies are is ...

AMER PHYSICAL SOC2020

Observation of Weyl Nodes in Robust Type-II Weyl Semimetal WP2

Oleg Yazyev, Gabriel Albert Autes, Quansheng Wu, Joël Mesot

Distinct to type-I Weyl semimetals (WSMs) that host quasiparticles described by the Weyl equation, the energy dispersion of quasiparticles in type-II WSMs violates Lorentz invariance and the Weyl cones in the momentum space are tilted. Since it was propose ...

AMER PHYSICAL SOC2019

Electronic properties of incommensurately modulated novel and complex materials

László Forró, Oleg Yazyev, Alla Arakcheeva, Gabriel Albert Autes, Philip Johannes Walter Moll, Ana Akrap, Edoardo Martino, Sergiy Katrych

INT UNION CRYSTALLOGRAPHY2018

Persistence of a surface state arc in the topologically trivial phase of MoTe2

Marco Grioni, Helmuth Berger, Arnaud Magrez, Oleg Yazyev, Alberto Crepaldi, Philippe Bugnon, Gabriel Albert Autes

The prediction of Weyl fermions in the low-temperature noncentrosymmetric 1T' phase of MoTe2 still awaits clear experimental confirmation. Here, we report angle-resolved photoemission (ARPES) data and ab initio calculations that reveal a surface state arc ...

Amer Physical Soc2017

Two-Orbital Kondo Screening in a Self-Assembled Metal Organic Complex

Harald Brune, Stefano Rusponi, Oleg Yazyev, Marina Pivetta, Fabio Donati, Luca Gragnaniello, Gabriel Albert Autes, Giulia Elisabetta Pacchioni

Iron atoms adsorbed on a Cu(111) surface and buried under polyphenyl dicarbonitrile molecules exhibit strongly spatial anisotropic Kondo features with directionally dependent Kondo temperatures and line shapes, as evidenced by scanning tunneling spectrosco ...

American Chemical Society2017

BiTeCl and BiTeBr: A comparative high-pressure optical study

Arnaud Magrez, Oleg Yazyev, Gabriel Albert Autes, Helmuth Berger, Philippe Bugnon, Ana Akrap

We here report a detailed high-pressure infrared transmission study of BiTeCl and BiTeBr. We follow the evolution of two band transitions: the optical excitation beta between two Rashba-split conduction bands, and the absorption. across the band gap. In th ...

Amer Physical Soc2017

A novel quasi-one-dimensional topological insulator in bismuth iodide beta-Bi4I4

László Forró, Marco Grioni, Oleg Yazyev, Luca Moreschini, Gabriel Albert Autes, Andrea Pisoni, Jens Christian Johannsen, Wentao Zhang

Recent progress in the field of topological states of matter(1,2) has largely been initiated by the discovery of bismuth and antimony chalcogenide bulk topological insulators (TIs; refs 3-6), followed by closely related ternary compounds(7-16) and predicti ...

Nature Publishing Group2016

Evidence for a Strong Topological Insulator Phase in ZrTe5

Arnaud Magrez, Oleg Yazyev, Gabriel Albert Autes, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi, Luca Gragnaniello

The complex electronic properties of ZrTe5 have recently stimulated in-depth investigations that assigned this material to either a topological insulator or a 3D Dirac semimetal phase. Here we report a comprehensive experimental and theoretical study of bo ...

Amer Physical Soc2016