Boldrin, D;
Fak, B;
Canevet, E;
Ollivier, J;
Walker, HC;
Manuel, P;
Khalyavin, DD;
(2018)
Vesignieite: An S=1/2 Kagome Antiferromagnet with Dominant Third-Neighbor Exchange.
Physical Review Letters
, 121
(10)
10.1103/PhysRevLett.121.107203.
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Abstract
The spin- 1 2 kagome antiferromagnet is an archetypal frustrated system predicted to host a variety of exotic magnetic states. We show using neutron scattering measurements that deuterated vesignieite BaCu 3 V 2 O 8 ( OD ) 2 , a fully stoichiometric S = 1 / 2 kagome magnet with < 1 % lattice distortion, orders magnetically at T N = 9 K into a multi- k coplanar variant of the predicted triple- k octahedral structure. We find that this structure is stabilized by a dominant antiferromagnetic third-neighbor exchange J 3 with minor first- or second-neighbor exchanges. The spin-wave spectrum is well described by a J 3 -only model including a tiny symmetric exchange anisotropy.
Type: | Article |
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Title: | Vesignieite: An S=1/2 Kagome Antiferromagnet with Dominant Third-Neighbor Exchange |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevLett.121.107203 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.121.107203 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, QUANTUM SPIN LIQUID, MAGNETIC EXCITATIONS, ORBITAL FRUSTRATION, STATE, BACU3V2O8(OH)(2), VOLBORTHITE |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
URI: | https://discovery.ucl.ac.uk/id/eprint/10056932 |
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