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29 papers · 1 filter
Straightforward Method to Orient Black Phosphorus from Bulk to Thin Layers using a Standard Green Laser
Etienne Carré, Frédéric Fossard, Jean-Sébastien Mérot +11
The crystallographic orientation of anisotropic 2D materials plays a crucial role in their physical properties and device performance. However, standard orientation techniques such…
Experimental evidence of the topological obstruction in twisted bilayer graphene
F. Mesple, P. Mallet, G. Trambly de Laissardière +4
The rich physics of magic angle twisted bilayer graphene (TBG) results from the Coulomb interactions of electrons in flat bands of non-trivial topology. While the bands' dispersion…
Ultrafast Hidden Spin Polarization Dynamics of Bright and Dark Excitons in 2H-WSe
Mauro Fanciulli, David Bresteau, Jérome Gaudin +9
We performed spin-, time- and angle-resolved extreme ultraviolet photoemission spectroscopy (STARPES) of excitons prepared by photoexcitation of inversion-symmetric 2H-WSe with…
Higgs amplitude mode in ballistic superconducting hybrid junctions
Pierre Vallet, Jérôme Cayssol
In superconductors (SC), the Higgs amplitude mode is a coherent oscillation of the order parameter typically generated by THz laser irradiation. In this paper we propose to probe t…
Enhanced intrinsic voltage gain in artificially stacked bilayer CVD graphene field effect transistors
Himadri Pandey, Jorge Daniel Aguirre Morales, Satender Kataria +6
We report on electronic transport in dual-gate, artificially stacked bilayer graphene field effect transistors (BiGFETs) fabricated from large-area chemical vapor deposited (CVD) g…
Conservation of chirality at a junction between two Weyl semimetals
Serguei Tchoumakov, Bogusz Bujnowski, Jonathan Noky +3
In Weyl semimetals the location of linear band crossings, the Weyl cones, is not bound to any high symmetry point of the Brillouin zone, unlike the Dirac nodes in graphene. This fl…