Charge Order in NaV2O5 studied by EPR

Abstract

We present angular dependent EPR measurements in NaV2O5 at X-band frequencies in the temperature range 4.2 K < T < 670 K. A detailed analysis in terms of the antisymmetric Dzyaloshinski-Moriya and the anisotropic exchange interactions yields the following scheme of charge order: On decreasing temperature a quarter-filled ladder with strong charge disproportions, existing for T > 100 K, is followed by zig-zag charge-order fluctuations which become long-range and static below T_SP=34 K.

4 pages including 3 figures, submitted to Phys. Rev. Lett

References in corpus (3)

• Spin gap behavior and charge ordering in α^{\prime}-NaV_2O_5 probed by light scattering
• Optical spectroscopic study of the interplay of spin and charge in NaV2O5
• Elastic Constants and Charge Ordering in a'-NaV2O5

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