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- W3195158108 abstract "A recent focus of quantum spin liquid (QSL) studies is how disorder/randomness in a QSL candidate affects its true magnetic ground state. The ultimate question is whether the QSL survives disorder or the disorder leads to a spin-liquid-like state, such as the proposed random-singlet (RS) state. Since disorder is a standard feature of most QSL candidates, this question represents a major challenge for QSL candidates. YbMgGaO$_4$, a triangular lattice antiferromagnet with effective spin-1/2 Yb$^{3+}$ ions, is an ideal system to address this question, since it shows no long-range magnetic ordering with Mg/Ga site disorder. Despite the intensive study, it remains unresolved as to whether YbMgGaO$_4$ is a QSL or in the RS state. Here, through ultralow-temperature thermal conductivity and magnetic torque measurements, plus specific heat and DC magnetization data, we observed a residual $kappa_0/T$ term and series of quantum spin state transitions in the zero temperature limit for YbMgGaO$_4$. These observations strongly suggest that a QSL state with itinerant excitations and quantum spin fluctuations survives disorder in YbMgGaO$_4$." @default.
- W3195158108 created "2021-08-30" @default.
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- W3195158108 date "2021-08-16" @default.
- W3195158108 modified "2023-10-15" @default.
- W3195158108 title "Survival of itinerant excitations and quantum spin state transitions in YbMgGaO4 with chemical disorder" @default.
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- W3195158108 doi "https://doi.org/10.1038/s41467-021-25247-6" @default.
- W3195158108 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8367942" @default.
- W3195158108 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34400621" @default.
- W3195158108 hasPublicationYear "2021" @default.
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