Concept
Mer de Dirac
Publications associées (32)
Magnon-phonon interactions enhance the gap at the Dirac point in the spin-wave spectra of CrI3 two-dimensional magnets
Recent neutron-diffraction experiments in honeycomb CrI3 quasi-2D ferromagnets have evinced the existence of a gap at the Dirac point in their spin-wave spectra. The existence of this gap has been attributed to strong in-plane Dzyaloshinskii-Moriya or Kita ...
AMER PHYSICAL SOC2023Thermal Evolution of Dirac Magnons in the Honeycomb Ferromagnet CrBr3
Bruce Normand, Christian Rüegg
CrBr3 is an excellent realization of the two-dimensional honeycomb ferromagnet, which offers a bosonic equivalent of graphene with Dirac magnons and topological character. We perform inelastic neutron scattering measurements using state-of-the-art instrume ...
2022Nonperturbative Quantum Field Theory in Curved Spacetime
Quantum Field Theory(QFT) as one of the most promising frameworks to study high energy and condensed matter physics, has been mostly developed by perturbative methods. However, perturbative methods can only capture a small island of the space of QFTs.QFT i ...
EPFL2022Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals
Emmanouil Frantzeskakis, Ji Dai
We report the observation of a nontrivial spin texture in Dirac node arcs, i.e., novel topological objects formed when Dirac cones of massless particles extend along an open one-dimensional line in momentum space. We find that such states are present in al ...
AMER PHYSICAL SOC2021Emergence of Nontrivial Low-Energy Dirac Fermions in Antiferromagnetic EuCd2As2
Vladimir N. Strocov, Joël Mesot, Pierre Richard, Han Wang, Hang Li
Parity-time symmetry plays an essential role for the formation of Dirac states in Dirac semimetals. So far, all of the experimentally identified topologically nontrivial Dirac semimetals (DSMs) possess both parity and time reversal symmetry. The realizatio ...
WILEY-V C H VERLAG GMBH2020Two-dimensional Rashba metals: Unconventional low-temperature transport properties
Rashba spin-orbit coupling emerges in materials lacking of structural inversion symmetry, such as heterostructures, quantum wells, surface alloys and polar materials, just to mention few examples. It yields a coupling between the spin and momentum of elect ...
PERGAMON-ELSEVIER SCIENCE LTD2019Efficient Multi-dimensional Diracs Estimation with Linear Sample Complexity
Martin Vetterli, Thierry Blu, Hanjie Pan
Estimating Diracs in continuous two or higher dimensions is a fundamental problem in imaging. Previous approaches extended one dimensional methods, like the ones based on finite rate of innovation (FRI) sampling, in a separable manner, e.g., along the hori ...
2018Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2
We present the crystal structure, electronic structure, and transport properties of the material YbMnSb2, a candidate system for the investigation of Dirac physics in the presence of magnetic order. Our measurements reveal that this system is a low-carrier ...
2018Band and Correlated Insulators of Cold Fermions in a Mesoscopic Lattice
Jean-Philippe Brantut, Thierry Giamarchi, Samuel Häusler
We investigate the transport properties of neutral, fermionic atoms passing through a one-dimensional quantum wire containing a mesoscopic lattice. The lattice is realized by projecting individually controlled, thin optical barriers on top of a ballistic c ...
2018Evolution of the Fermi surface of BiTeCl with pressure
We report measurements of Shubnikov-de Haas oscillations in the giant Rashba semiconductor BiTeCl under applied pressures up to similar to 2.5 GPa. We observe two distinct oscillation frequencies, corresponding to the Rashba-split inner and outer Fermi sur ...
Iop Publishing Ltd2017