Chair for Ultrafast Phenomena

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Alexej Pashkin receives DFG research grant for ultrafast spectroscopy under high hydrostatic pressure

Alexej Pashkin will be leading a new research project entitled “Time-Resolved Optical Spectroscopy under High Pressures”. This grant is provided by Deutsche Forschungsgemeinschaft (DFG). The main goal of the research program is a synergy of time-resolved optical spectroscopy and high-pressure technology. This combination will be exploited for the study of ultrafast phase transitions in materials with strong electronic correlations.

Until now most time-resolved experiments have been performed at ambient pressure. Temperature was used as a single parameter which tunes a system across the phase transition. Application of high external pressures offers an additional degree of freedom in controlling electronic localization in solids. In the course of the project a methodology of ultrafast spectroscopy at extreme hydrostatic pressures will be developed. In particular, field-resolved terahertz spectroscopy measurements under pressure will be performed for the first time. The studies are aiming at a microscopic understanding of the coupling mechanisms underlying attractive functionalities of strongly correlated materials such as high-temperature superconductivity, insulator-metal transitions or colossal magnetoresistance.