The range of non-Kitaev terms and fractional particles in α-RuCl3
Author(s): Wang, Yiping; Osterhoudt, Gavin B; Tian, Yao; Lampen-Kelley, Paige; Banerjee, Arnab; et al
DownloadTo refer to this page use:
http://arks.princeton.edu/ark:/88435/pr1s17ss90
Abstract: | Significant efforts have focused on the magnetic excitations of relativistic Mott insulators, predicted to realize the Kitaev quantum spin liquid (QSL). This exactly solvable model involves a highly entangled state resulting from bond-dependent Ising interactions that produce excitations which are non-local in terms of spin flips. A key challenge in real materials is identifying the relative size of the non-Kitaev terms and their role in the emergence or suppression of fractional excitations. Here, we identify the energy and temperature boundaries of non-Kitaev interactions by direct comparison of the Raman susceptibility of α-RuCl3 with quantum Monte Carlo (QMC) results for the Kitaev QSL. Moreover, we further confirm the fractional nature of the magnetic excitations, which is given by creating a pair of fermionic quasiparticles. Interestingly, this fermionic response remains valid in the non-Kitaev range. Our results and focus on the use of the Raman susceptibility provide a stringent new test for future theoretical and experimental studies of QSLs. |
Publication Date: | 4-Mar-2020 |
Electronic Publication Date: | 4-Mar-2020 |
Citation: | Wang, Yiping, Osterhoudt, Gavin B, Tian, Yao, Lampen-Kelley, Paige, Banerjee, Arnab, Goldstein, Thomas, Yan, Jun, Knolle, Johannes, Ji, Huiwen, Cava, Robert J, Nasu, Joji, Motome, Yukitoshi, Nagler, Stephen E, Mandrus, David, Burch, Kenneth S. (2020) The range of non-Kitaev terms and fractional particles in α-RuCl3. npj Quantum Materials, 5 (1), 10.1038/s41535-020-0216-6 |
DOI: | doi:10.1038/s41535-020-0216-6 |
EISSN: | 2397-4648 |
Language: | en |
Type of Material: | Journal Article |
Journal/Proceeding Title: | npj Quantum Materials |
Version: | Author's manuscript |
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.