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Tuning Electronic Correlation With Pressure, Gilberto Fernandes Lopes Fabbris
Tuning Electronic Correlation With Pressure, Gilberto Fernandes Lopes Fabbris
Arts & Sciences Electronic Theses and Dissertations
Strongly correlated electron systems display some of the most exotic ground states in condensed matter. In this thesis high pressure is used to tune the degree of electron correlations in systems of current interest. Their electronic and structural properties were investigated at high pressure using x-ray spectroscopy and scattering as well as transport techniques in a diamond anvil cell. The interplay between short- and long-range structural order, one-dimensional charge ordering, and superconductivity was studied in La1.875Ba0.125CuO4. At ambient pressure, this material displays charge ordering at the onset of a low temperature structural phase transition, …