A three-dimensional uranium-fluorine spin-frustrated CaB6-type lattice as potential conductive and quantum spin liquid candidate
A case showing quantum spin liquid (QSL) behavior remains extremely scarce until now. To this end, it is suggested that the geometrical spin-frustrated lattices may be a potential platform for the study of QSL phenomena. In this work, we present an unprecedented geometrical spin-frustrated lattice w...
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Published in: | Ionics 2023-07, Vol.29 (7), p.2679-2685 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | A case showing quantum spin liquid (QSL) behavior remains extremely scarce until now. To this end, it is suggested that the geometrical spin-frustrated lattices may be a potential platform for the study of QSL phenomena. In this work, we present an unprecedented geometrical spin-frustrated lattice with a three-dimensional five-connected
CaB
6
-type topological matrix for the U(IV) centers in a novel uranium-fluorine compound, [U
6
F
31
] [NH
4
]
7
. Impressively, as evidenced by both the magnetic susceptibility and heat capacity measurements, this uranium-fluorine compound performs strong antiferromagnetic interactions without magnetic ordering, or spin freezing, or nonmagnetic singlet ground state down to 2 K, however appearing to be a QSL candidate. Moreover, [U
6
F
31
][NH
4
]
7
also enables remarkable proton conductivity of 1.87 × 10
−4
S/cm rather than electrical insulator as observed in the literature for all reported uranium-fluorine compounds, mainly resulted from the long-range hydrogen bond pathway between NH
4
+
and F
−
. More importantly, [U
6
F
31
][NH
4
]
7
can be also used as ionic channel through solid–liquid reaction of cation exchange between NH
4
+
and Li
+
, leading to high lithium-ion conduction of 2.48 × 10
−3
S/cm. |
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ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-023-05033-8 |