NDLI: Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu_{2}IrO

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Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu_{2}IrO_{3}.

Content Provider	Semantic Scholar
Author	Choi, Yong Seon Lee, Chul Hoon Lee, Sungjay Yoon, Sungwon Park, Jinhyun Ali, Anzar Singh, Yogesh Orain, J. C. Kim, Gareoung Rhyee, Jong-Soo Chen, Wei-Tin Chou, Fangcheng Choi, K.
Copyright Year	2019
Abstract	We report on magnetization M(H), dc and ac magnetic susceptibility χ(T), specific heat C_{m}(T) and muon spin relaxation (μSR) measurements of the Kitaev honeycomb iridate Cu_{2}IrO_{3} with quenched disorder. In spite of the chemical disorders, we find no indication of spin glass down to 260 mK from the C_{m}(T) and μSR data. Furthermore, a persistent spin dynamics observed by the zero-field muon spin relaxation evidences an absence of static magnetism. The remarkable observation is a scaling relation of χ[H,T] and M[H,T] in H/T with the scaling exponent α=0.26-0.28, expected from bond randomness. However, C_{m}[H,T]/T disobeys the predicted universal scaling law, pointing towards the presence of additional low-lying excitations on the background of bond-disordered spin liquid. Our results signify a many-faceted impact of quenched disorder in a Kitaev spin system due to its peculiar bond character.
Starting Page	167202
Ending Page	167202
Page Count	1
File Format	PDF HTM / HTML
DOI	10.1103/PhysRevLett.122.167202
PubMed reference number	31075021
Journal	Medline
Volume Number	122
Issue Number	16
Alternate Webpage(s)	https://arxiv.org/pdf/1811.07002v1.pdf
Alternate Webpage(s)	https://www.dora.lib4ri.ch/psi/islandora/object/psi:21217/datastream/PDF/Choi-2019-Exotic_low-energy_excitations_emergent_in-(published_version).pdf
Alternate Webpage(s)	https://doi.org/10.1103/PhysRevLett.122.167202
Journal	Physical review letters
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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