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Quantum phase transitions and novel phases.

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The phenomena occurring at the disappearance of a magnetically ordered state upon tuning a non-thermal parameter like pressure, composition, or magnetic field are presently among the central topics in the field of strongly correlated electron systems. Quantum criticality in metals not only leads to a breakdown of Fermi liquid theory but could also promote the formation of novel (quantum) phases like spin-liquid behavior, unconventional superconductivity or electronic nematic ordering. In the talk, I will discuss recent low-temperature thermodynamic and transport experiments on f-electron based heavy-fermions, ruthenates and iron pnictides.

This talk is part of the Quantum Matter Seminar series.

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