Abstract
The basis for our understanding of quantum magnetism has been the study of elegantly simple model systems. However, even for the antiferromagnetic honeycomb lattice with isotropic spin interactions–one of the simplest model systems–a detailed understanding of quantum effects is still lacking. Here, using inelastic neutron scattering measurements of the honeycomb lattice material YbCl3, we elucidate how quantum effects renormalize the single-magnon and multimagnon excitations and how this renormalization can be tuned and ultimately driven to the classical limit by applying a magnetic field. Additionally, our work reveals that the quantum effects tuned by the magnetic field not only renormalize the magnetic excitations but also induce a distinctive sharp feature inside the multimagnon continuum. From a more general perspective, this result demonstrates that structures within magnetic continua can occur over a wide experimental parameter space and can be used as a reliable means of identifying quantum phenomena.
| Original language | English |
|---|---|
| Article number | 234 |
| Journal | Communications Physics |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 2023 |
Funding
We thank P. Naumov for assistance with the setup and operation of the dilution refrigerator and magnet for the CAMEA experiments. We thank M. Kofu for their assistance with the setup of the AMATERAS instrument. This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences, and Engineering Division. This research used resources at the Spallation Neutron Source and the High Flux Isotope Reactor, Department of Energy (DOE) Office of Science User Facilities operated by Oak Ridge National Laboratory (ORNL). The AMATERAS experiment at the Materials and Life Science Experimental Facility of the J-PARC was performed under a user program (Proposal no. 2019B0273). K. Kaneko was supported by JSPS KAKENHI Grants no. JP20H01864, no. JP21H04987, and no. JP19H04408. We acknowledge the Paul Scherrer Institut for the CAMEA experiment (Proposal No. 20212728). G.S. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 884104 (PSI-FELLOW-III-3i) and Chalmers X-Ray and Neutron Initiatives (CHANS) grant. Y.K. was supported by JSPS KAKENHI Grants. No. JP22K03509 and the QMC results were obtained by the QMC program DSQSS ( https://github.com/issp-center-dev/dsqss ). Proof of principle calculations by G.B.H. were supported by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy. We thank P. Naumov for assistance with the setup and operation of the dilution refrigerator and magnet for the CAMEA experiments. We thank M. Kofu for their assistance with the setup of the AMATERAS instrument. This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences, and Engineering Division. This research used resources at the Spallation Neutron Source and the High Flux Isotope Reactor, Department of Energy (DOE) Office of Science User Facilities operated by Oak Ridge National Laboratory (ORNL). The AMATERAS experiment at the Materials and Life Science Experimental Facility of the J-PARC was performed under a user program (Proposal no. 2019B0273). K. Kaneko was supported by JSPS KAKENHI Grants no. JP20H01864, no. JP21H04987, and no. JP19H04408. We acknowledge the Paul Scherrer Institut for the CAMEA experiment (Proposal No. 20212728). G.S. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 884104 (PSI-FELLOW-III-3i) and Chalmers X-Ray and Neutron Initiatives (CHANS) grant. Y.K. was supported by JSPS KAKENHI Grants. No. JP22K03509 and the QMC results were obtained by the QMC program DSQSS (https://github.com/issp-center-dev/dsqss). Proof of principle calculations by G.B.H. were supported by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy.