Quantum oscillations in a pyrochlore superconductor Cd<sub>2</sub>Re<sub>2</sub>O<sub>7</sub>
ORAL
Abstract
Metallic pyrochlore oxide Cd2Re2O7, the first superconductor in pyrochlore oxide family, shows a structural phase transition from cubic to tetragonal at Tc = 200 K. However, while the transport properties exhibit dramatic change across Tc, the lattice parameter change is extremely small and the electron correlation is argued as a driving force of the phase transition. Recently a multipolar nematic phase has been observed by second harmonic generation, proving this theory. Despite the interest in this material, no experimental Fermiology has been reported so far. We report the first observation of de Haas van Alphen quantum oscillations in single crystals of Cd2Re2O7 by torque magnetometry. The angular dependence of oscillation patterns and its comparison to the theoretical prediction will be discussed.
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Presenters
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Tomoya Asaba
- Physics, Univ of Michigan - Ann Arbor
- Department of Physics, Univ of Michigan - Ann Arbor
- Univ of Michigan - Ann Arbor