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Journal articles
Ground State of the Kagomé-Like S = 1 / 2 Antiferromagnet Volborthite C$u_3$ $V_2$ $O_7$ (OH$)_2$ · 2$H_2$O
Abstract : The volborthite compound is one of the very few realizations of S=1/2 quantum spins on a highly
frustrated kagomé-like lattice. Low-{\it T} SQUID measurements reveal a broad magnetic transition below 2K
which is further confirmed by a peak in the $^{51}$V nuclear spin relaxation rate (1/$T_1$) at 1.4 K \pm 0.2 K.
Through $^{51}$V NMR, the ground state (GS) appears to be a mixture of different spin configurations, among
which 20% corresponds to a well defined short-range order, possibly of the $\sqrt 3$ x $\sqrt 3$ type. While the
freezing involves all the C$u_{2,+}$ spins, only 40% of the copper moment is actually frozen which suggests
that quantum fluctuations strongly renormalize the GS.
Cited literature [10 references]
https://hal-cea.archives-ouvertes.fr/cea-01395314
Contributor : Dominique Girard <>
Submitted on : Thursday, November 10, 2016 - 4:04:55 PM
Last modification on : Tuesday, November 24, 2020 - 3:30:11 PM
Long-term archiving on: : Monday, March 20, 2017 - 11:57:49 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, November 10, 2016 - 4:04:55 PM
Last modification on : Tuesday, November 24, 2020 - 3:30:11 PM
Long-term archiving on: : Monday, March 20, 2017 - 11:57:49 PM
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