Magnetic Behavior of Volborthite Cu3 V2 O7 (OH)2·2 H2 O Determined by Coupled Trimers Rather than Frustrated Chains

O. Janson, S. Furukawa, T. Momoi, P. Sindzingre, J. Richter, K. Held

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Motivated by recent experiments on volborthite single crystals showing a wide 13-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 J′ and J1. Simulations of the derived spin Hamiltonian show good agreement with the experimental low-field magnetic susceptibility and high-field magnetization data. The 13-plateau phase pertains to polarized magnetic trimers formed by strong J bonds. An effective J→ model shows a tendency towards condensation of magnon bound states preceding the plateau phase.

Original languageEnglish
Article number037206
JournalPhysical review letters
Volume117
Issue number3
DOIs
Publication statusPublished - 2016 Jul 12
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Magnetic Behavior of Volborthite Cu3 V2 O7 (OH)2·2 H2 O Determined by Coupled Trimers Rather than Frustrated Chains'. Together they form a unique fingerprint.

  • Cite this