Neutron scattering in the proximate quantum spin liquid α-RuCl 3

Author:

Banerjee Arnab1ORCID,Yan Jiaqiang2,Knolle Johannes3,Bridges Craig A.4,Stone Matthew B.1ORCID,Lumsden Mark D.1ORCID,Mandrus David G.25ORCID,Tennant David A.6ORCID,Moessner Roderich7ORCID,Nagler Stephen E.1ORCID

Affiliation:

1. Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

2. Material Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

3. Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK.

4. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

5. Department of Materials Science and Engineering, University of Tennesee, Knoxville, TN 37996, USA.

6. Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

7. Max Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany.

Abstract

Sighting of magnetic Majorana fermions? Quantum spin liquids—materials whose magnetic spins do not settle into order even at absolute zero temperature—have long captured the interest of physicists. A particularly lofty goal is finding a material that can be described by the so-called Kitaev spin model, a network of spins on a honeycomb lattice that harbors Majorana fermions as its excitations. Banerjee et al. present a comprehensive inelastic neutron scattering study of single crystals of the material α-RuCl 3 , which has been predicted to a host a Kitaev spin liquid. The unusual dependence of the data on energy, momentum, and temperature is consistent with the Kitaev model. Science , this issue p. 1055

Funder

U.S. Department of Energy

Gordon and Betty Moore Foundation

Helmholtz Association

Deutsche Forschungsgemeinschaft

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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