Charge-Order Pattern of the Low-Temperature Phase of NaV2O5 Uniquely Determined by Resonant X-Ray Scattering from Monoclinic Single Domain

Abstract

The present resonant x-ray scattering from each of monoclinically-split single domains of NaV2O5 has critically enhanced contrast between V4+ and V5+ ions strong enough to lead to unambiguous conclusion of the charge-order pattern of its low-temperature phase below Tc = 35 K. The zig-zag type charge-order patterns in the $ab$-plane previously confirmed have four kinds of configurations (A, A', B and B') and the stacking sequence along the c-axis is determined as the AAA'A' type by comparison with model calculations. By assigning the A and A' configurations to Ising spins, one can reasonably understand the previously discovered "devil's staircase"-type behavior with respect to the modulation of the layer-stacking sequences at high pressures and low temperatures, which very well resembles the global phase diagram theoretically predicted by the ANNNI model.

arXiv comment4 pages, 3 figures

References in corpus (7)

• NaV_2O_5 as a quarter-filled ladder compound
• X-ray Anomalous Scattering Study of a Charge-Ordered State in NaV2O5
• The "devil's staircase" type phase transition in NaV2O5 under high pressure
• Response: Spin-Singlet clusters in the ladder compound NaV2O5
• Low-Temperature Structure of the Quarter-Filled Ladder Compound alpha'-NaV2O5
• X-ray anomalous scattering investigations on the charge order in ${\alpha }^{\prime }$-NaV${}_2$O${}_5$
• Zigzag Charge Ordering in alpha'-NaV2O5

Cited by in corpus (7)

• Theoretical Aspects of Charge Ordering in Molecular Conductors
• Pressure-induced changes in the optical properties of quasi-one-dimensional $\beta$-Na${}_{0.33}$V${}_2$O${}_5$
• Creation and destruction of a spin gap in weakly coupled quarter-filled ladders
• Charge order in photosensitive Bi0.4Ca0.6MnO3 films
• Charge order induced by electron-lattice interaction in NaV2O5
• Spin ladder compound Pb(0.55)Cd(0.45)V(2)O(5): synthesis and investigation
• Terahertz light driven coherent excitation of a zone-folded Raman-active phonon mode in the Spin-Ladder System ${\alpha }^{\prime }$-NaV${}_2$O${}_5$