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Evidence of a Phonon Hall Effect in the Kitaev Spin Liquid Candidate -RuCl
É. Lefrançois, G. Grissonnanche, J. Baglo +9
The material -RuCl has been the subject of intense scrutiny as a potential Kitaev quantum spin liquid, predicted to display Majorana fermions as low energy excitations. In p…
The Role of the Third Dimension in Searching Majorana Fermions in -RuCl via Phonons
Sai Mu, Kiranmayi D. Dixit, Xiaoping Wang +12
Understanding phonons in -RuCl is critical to analyze the controversy around the observation of the half-integer thermal quantum Hall effect. While many studies have focused…
Dirac magnons, nodal lines, and nodal plane in elemental gadolinium
Allen Scheie, Pontus Laurell, Paul A. McClarty +4
We investigate the magnetic excitations of elemental gadolinium (Gd) using inelastic neutron scattering, showing that Gd is a Dirac magnon material with nodal lines at and noda…
Spin exchange Hamiltonian and topological degeneracies in elemental gadolinium
Allen Scheie, Pontus Laurell, Paul A. McClarty +4
We present a comprehensive study of the magnetic exchange Hamiltonian of elemental Gadolinium. We use neutron scattering to measure the magnon spectrum over the entire Brillouin zo…
Oscillations of the thermal conductivity observed in the spin-liquid state of -RuCl
Peter Czajka, Tong Gao, Max Hirschberger +6
In the class of materials called spin liquids, a magnetically ordered state cannot be attained even at milliKelvin temperatures because of conflicting constraints on each spin (for…
Witnessing entanglement in quantum magnets using neutron scattering
A. Scheie, Pontus Laurell, A. M. Samarakoon +6
We demonstrate how quantum entanglement can be directly witnessed in the quasi-1D Heisenberg antiferromagnet KCuF. We apply three entanglement witnesses --- one-tangle, two-tan…