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Zeitschriftenartikel:

Oleg Janson, S. Furukawa, T. Momoi, P. Sindzingre, J. Richter, K. Held:
"Magnetic Behavior of Volborthite Cu3V2O7(OH)2(H2O) Determined by Coupled Trimers Rather than Frustrated Chains";
Physical Review Letters, 117 (2016), S. 037206.



Kurzfassung englisch:
Motivated by recent experiments on volborthite single crystals showing a wide 1/3-magnetization plateau, we perform microscopic modeling by means of density functional theory (DFT) with the single-crystal structural data as a starting point. Using DFT+U, we find four leading magnetic exchanges: antiferromagnetic J and J2, as well as ferromagnetic J0 and J1. Simulations of the derived spin Hamiltonian show good agreement with the experimental low-field magnetic susceptibility and high-field magnetization data. The 1/3 -plateau phase pertains to polarized magnetic trimers formed by strong J bonds. An effective J -> infty model shows a tendency towards condensation of magnon bound states preceding the plateau phase.


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1103/PhysRevLett.117.037206


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.