Pressure and alloying effects on the metal to insulator transition instudied by infrared spectroscopy
- 6 August 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 80 (7), 073101
- https://doi.org/10.1103/physrevb.80.073101
Abstract
The metal to insulator transition in the charge-transfer compound has been investigated through infrared reflectivity. Measurements performed by applying pressure to pure (lattice contraction) and by Se alloying (lattice expansion) reveal that in both cases an anomalous metallic state is obtained. We find that optical results are not compatible with the linear Se-alloying vs pressure-scaling relation previously established through transport, thus pointing out the substantially different microscopic origin of the two transitions.
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