Concept
Paul Dirac
Publications associées (43)
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 SOC2023Wigner Gaussian dynamics: Simulating the anharmonic and quantum ionic motion
The atomic motion controls important properties of materials, such as thermal transport, phase transitions, and vibrational spectra. However, simulating the ionic dynamics is exceptionally challenging when quantum fluctuations are relevant (e.g., at low te ...
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 ...
2022Experimental 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 SOC2021NMR Study of Spin Dynamics in V7Zn and V7Ni Molecular Rings
We present a(1)H NMR investigation of spin dynamics in two finite integer spin molecular nanomagnetic rings, namely V7Zn and V7Ni. This study could be put in correlation with the problem of Haldane gap in infinite integer spin chains. While V7Zn is an appr ...
2020Two-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 LTD2019