Illustration of the Verwey-type Charge Ordering Transition in Cs<sub>4</sub>O<sub>6</sub> (IMAGE)

Max Planck Institute for Chemical Physics of Solids

Illustration of the Verwey-type Charge Ordering Transition in Cs<sub>4</sub>O<sub>6</sub>

Caption

The charge disordered crystal structure (left) where all negatively charged oxygen molecules are equivalent is transformed into the charge ordered structure (right) with distinct singly charged O2- and doubly charged O22- ions. The transition is accompanied by a drastic drop or increase in the electrical conductivity (inverse of resistivity) σ on cooling or heating, respectively. The change in conductivity, shown here on a logarithmic scale, reveals a hysteresis.

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MPI CPfS

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