Leading interactions in the $\beta$-$Sr{V}_6{O}_{15}$ compound

Abstract

The present study shows that the electronic structure of the $\beta$-$AV\_6O\_15$ family of compounds ($A=Sr,Ca,Na...$) is based on weakly interacting two-leg ladders, in contrast with the zig-zag chain model one could expect from their crystal structure. Spin dimer analysis, based on extended Hückel tight-binding calculations, was performed to determine the structure of the dominant transfer and magnetic interactions in the room temperature $\beta$-$SrV\_6O\_15$ phase. Two different two-legs ladders, associated with different charge/spin orders are proposed to describe these one-dimensional $\beta$-type systems. The antiferromagnetic ladders are packed in an 'IPN' geometry and coupled to each other through weak antiferromagnetic interactions. This arrangement of the dominant interactions explains the otherwise surprising similarities of the optical conductivity and Raman spectra for the one-dimensional $\beta$-type phases and the two-dimensional $\alpha$-type ones such as the well-known ${\alpha }^{\prime }$-$NaV\_2O\_5$ system.

References in corpus (10)

• Superconductivity in a Quasi One Dimensional Spin Liquid
• Pairing and Excitation Spectrum in doped t-J Ladders
• Interference of a first-order transition with the formation of a spin-Peierls state in alpha'-NaV2O5?
• Ab initio evaluation of local effective interactions in ${\alpha }^{\prime }Na{V}_2{O}_5$
• Ab initio evaluation of the charge-ordering in ${\alpha }^{\prime }Na{V}_2{O}_5$
• Low temperature ellipsometry of NaV2O5
• Charge Ordering and Spin Dynamics in NaV2O5
• Crystal structure and charge order below the metal-insulator transition in the vanadium bronze $\beta$-SrV${}_6$O${}_{15}$
• Raman scattering study of charge ordering in beta-Ca0.33V2O5
• A Model with Propagating Spinons beyond One Dimension

Cited by in corpus (5)

• Magnetic properties of the antiferromagnetic spin-1/2 chain system $\beta$-TeVO${}_4$
• Pressure-induced changes in the optical properties of quasi-one-dimensional $\beta$-Na${}_{0.33}$V${}_2$O${}_5$
• Site-Selective NMR in the Quasi-1D Conductor beta-Sr0.33V2O5
• Local spin and charge properties of beta-Ag0.33V2O5 studied by 51V NMR
• Investigation of lattice dynamics, magnetism and electronic transport in $\beta$-Na${}_{0.33}$V${}_2$O${}_5$