Using magnetic dynamics to measure the spin gap in a candidate Kitaev material
X Jiang, Q Qiu, C Peng, H Jang, W Chen, X Jin… - arXiv preprint arXiv …, 2024 - arxiv.org
X Jiang, Q Qiu, C Peng, H Jang, W Chen, X Jin, L Yue, B Lee, SY Park, M Kim, HD Kim…
arXiv preprint arXiv:2405.03212, 2024•arxiv.orgMaterials potentially hosting Kitaev spin-liquid states are considered crucial for realizing
topological quantum computing. However, the intricate nature of spin interactions within
these materials complicates the precise measurement of low-energy spin excitations
indicative of fractionalized excitations. Using Na $ _ {2} $ Co $ _2 $ TeO $ _ {6} $ as an
example, we study these low-energy spin excitations using the time-resolved resonant
elastic x-ray scattering (tr-REXS). Our observations unveil remarkably slow spin dynamics at …
topological quantum computing. However, the intricate nature of spin interactions within
these materials complicates the precise measurement of low-energy spin excitations
indicative of fractionalized excitations. Using Na $ _ {2} $ Co $ _2 $ TeO $ _ {6} $ as an
example, we study these low-energy spin excitations using the time-resolved resonant
elastic x-ray scattering (tr-REXS). Our observations unveil remarkably slow spin dynamics at …
Materials potentially hosting Kitaev spin-liquid states are considered crucial for realizing topological quantum computing. However, the intricate nature of spin interactions within these materials complicates the precise measurement of low-energy spin excitations indicative of fractionalized excitations. Using NaCoTeO as an example, we study these low-energy spin excitations using the time-resolved resonant elastic x-ray scattering (tr-REXS). Our observations unveil remarkably slow spin dynamics at the magnetic peak, whose recovery timescale is several nanoseconds. This timescale aligns with the extrapolated spin gap of 1 eV, obtained by density matrix renormalization group (DMRG) simulations in the thermodynamic limit. The consistency demonstrates the efficacy of tr-REXS in discerning low-energy spin gaps inaccessible to conventional spectroscopic techniques.
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