Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa₂Cu₃O _y.

ABSTRACT: The origin of the pseudogap region below a temperature T* is at the heart of the mysteries of cuprate high-temperature superconductors. Unusual properties of the pseudogap phase, such as broken time-reversal and inversion symmetry are observed in several symmetry-sensitive experiments: polarized neutron diffraction, optical birefringence, dichroic angle-resolved photoemission spectroscopy, second harmonic generation, and polar Kerr effect. These properties suggest that the pseudogap region is a genuine thermodynamic phase and are predicted by theories invoking ordered loop currents or other forms of intra-unit-cell (IUC) magnetic order. However, muon spin rotation (μSR) and nuclear magnetic resonance (NMR) experiments do not see the static local fields expected for magnetic order, l

SUBMITTER: Zhang J 

PROVIDER: S-EPMC5756666 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature