Vanishing nematic order beyond the pseudogap phase in overdoped cuprate superconductors
arXiv:2012.08450 · doi:10.1073/pnas.2106881118
Abstract
During the last decade, translational and rotational symmetry-breaking phases -- density wave order and electronic nematicity -- have been established as generic and distinct features of many correlated electron systems, including pnictide and cuprate superconductors. However, in cuprates, the relationship between these electronic symmetry-breaking phases and the enigmatic pseudogap phase remains unclear. Here, we employ resonant x-ray scattering in a cuprate high-temperature superconductor LaNdSrCuO (Nd-LSCO) to navigate the cuprate phase diagram, probing the relationship between electronic nematicity of the Cu 3 orbitals, charge order, and the pseudogap phase as a function of doping. We find evidence for a considerable decrease in electronic nematicity beyond the pseudogap phase, either by raising the temperature through the pseudogap onset temperature or increasing doping through the pseudogap critical point, . These results establish a clear link between electronic nematicity, the pseudogap, and its associated quantum criticality in overdoped cuprates. Our findings anticipate that electronic nematicity may play a larger role in understanding the cuprate phase diagram than previously recognized, possibly having a crucial role in the phenomenology of the pseudogap phase.
arXiv comment30 pages, 9 figures, Main text and Supplementary material
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- Fermi surface transformation at the pseudogap critical point of a cuprate superconductor
- Electrons with Planckian scattering obey standard orbital motion in a magnetic field
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