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Tuning Dimensionality in Low-Dimensional Electronic Materials

We demonstrate how dimensionality can be tuned in complex low-dimensional electronic materials via small perturbations in competing molecular forces. The delicate balance between molecular level forces on observed dimensionality in materials is illustrated by the 1-d to 3-d structural reorganization following deuteration of the ancillary ligands in the halogen-bridged transition-metal charge-transfer complex [Pt(en)(2)I-2][Pt(en)(2)]I-2 (PtI) where en denotes ethylenediamine. Specifically, the impact of competing forces on dimensionality is clearly demonstrated by the temperature-dependent phase transitions in perdeuterated PtI (D-PtI), where small changes in inter-and intra-sheet interactions drive mesoscopic structural changes.

low-dimensional materials ; halogen-bridged transition-metal charge-transfer complex

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