Visualization of the Local Insulator-Metal Transition in Pr 0.7 Ca 0.3 MnO 3
- 19 June 1998
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 280 (5371) , 1925-1928
- https://doi.org/10.1126/science.280.5371.1925
Abstract
The light-induced insulator-metal transition in the “colossal magnetoresistance” compound Pr 0.7 Ca 0.3 MnO 3 is shown to generate a well-localized conducting path while the bulk of the sample remains insulating. The path can be visualized through a change of reflectivity that accompanies the phase transition. Its visibility provides a tool for gaining insight into electronic transport in materials with strong magnetic correlations. For example, a conducting path can be generated or removed at an arbitrary position just because of the presence of another path. Such manipulation may be useful in the construction of optical switches.Keywords
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