Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 17, 2015
Previous Article Next Article

SrCu3V2O8(OH)2 – dynamic Jahn–Teller distortions and orbital frustration in a new S = ½ kagome antiferromagnet

Author affiliations

Abstract

In this article we report the synthesis of a new model S = ½ KAFM, SrCu3V2O8(OH)2, the Sr2+ analogue of vesignieite created by substitution of Ba2+ by isomagnetic Sr2+, hereafter referred to as ‘Sr-vesignieite’. Like many other kagome magnets, the magnetic moments in ‘Sr-vesignieite’ are hosted by Jahn–Teller distorted Cu2+ ions, which possess orbital degeneracy. Rather than causing a static and coherent distortion to the crystal structure, as might have been predicted, our studies of the crystallographic and bulk magnetic properties of ‘Sr-vesignieite’ evidence orbital fluctuations and orbital-ordering transitions. The mediating role of orbitals in superexchange leads to a natural coupling of the spin and orbital degrees-of-freedom, which introduces orbital-driven Ising-type modulations to the magnetic Hamiltonian. Further, we find the crystallographic signature of the dynamic Jahn–Teller effect in the other model KAFMs, indicating that the orbital fluctuations and phase transitions are more common than previously thought. It follows that behavior currently ascribed to the quantum behavior of spins may in part be due to spin–orbital fluctuations.

Graphical abstract: SrCu3V2O8(OH)2 – dynamic Jahn–Teller distortions and orbital frustration in a new S = ½ kagome antiferromagnet

Back to tab navigation

Article information


Submitted
26 Jan 2015
Accepted
04 Mar 2015
First published
13 Mar 2015

J. Mater. Chem. C, 2015,3, 4308-4315
Article type
Paper
Author version available

SrCu3V2O8(OH)2 – dynamic Jahn–Teller distortions and orbital frustration in a new S = ½ kagome antiferromagnet

D. Boldrin and A. S. Wills, J. Mater. Chem. C, 2015, 3, 4308
DOI: 10.1039/C5TC00259A

Social activity

Search articles by author

Spotlight

Advertisements