Magnetic properties of (VO)_2P_2O_7: two-plane structure and spin-phonon interactions

Abstract

Detailed experiments on single-crystal (VO)_2P_2O_7 continue to reveal new and unexpected features. We show that a model composed of two, independent planes of spin chains with frustrated magnetic coupling is consistent with nuclear magnetic resonance and inelastic neutron scattering measurements. The pivotal role of PO_4 groups in mediating intrachain exchange interactions explains both the presence of two chain types and their extreme sensitivity to certain lattice vibrations, which results in the strong magnetoelastic coupling observed by light scattering. We compute the respective modifications of the spin and phonon dynamics due to this coupling, and illustrate their observable consequences on the phonon frequencies, magnon dispersions, static susceptibility and specific heat.

10 pages, 9 figures

References in corpus (1)

• High Temperature Expansion for Frustrated and Unfrustrated S=1/2 Spin Chains

Cited by in corpus (10)

• Magnetic light scattering in low-dimensional quantum spin systems
• Complete bond-operator theory of the two-chain spin ladder
• Modeling of the Magnetic Susceptibilities of the Ambient- and High-Pressure Phases of (VO)_{2}P_{2}O_{7}
• Magnetic and thermal properties of 4f-3d ladder-type molecular compounds
• Spin-Phonon Chains with Bond Coupling
• Dynamical properties of a driven dissipative dimerized $S=1/2$ chain
• Thermodynamic Properties of the Dimerised and Frustrated S=1/2 Chain
• Electronic and magnetic structure of CsV${}_2$O${}_5$
• Strong-coupling magnetophononics: Self-blocking, phonon-bitriplons, and spin-band engineering
• Thermodynamics of a Spin-1/2 Chain Coupled to Einstein Phonons