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Novel quantum phases on Kondo lattices due to quantum criticality and geometrical frustraton

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Novel quantum phases in non Fermi liquids that emerge upon suppression of a magnetic phase have been one of the focuses of condensed matter physics. One of the well studied examples is exotic superconductivity near the quantum criticality of heavy fermion systems. On the other hand, geometrical frustration approach provides another way to suppress conventional magnetism and promote a novel low temperature phase. Here, I will talk about our recent findings of two different examples for such phenomena. One is on the superconductivity and quantum criticality observed in the first Yb based heavy fermion superconductor YbAlB4. The other is the spin liquid phase of the geometrically frustrated Kondo lattice Pr2Ir2O7 that exhibits a “spontaneous” anomalous Hall effect.

This talk is part of the Quantum Matter Seminar series.

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