Journal
NATURE PHYSICS
Volume 15, Issue 4, Pages 335-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41567-018-0401-8
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Funding
- National Science Foundation [1751739]
- Canada Foundation Innovation
- Natural Sciences and Engineering Research Council of Canada
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversification Canada
- National Research Council Canada
- Canada Institutes of Health Research
- DOE Office of Science User Facility [DE-AC02-05CH11231]
- Samsung Foundation of Culture
- Swiss National Science Foundation Early Postdoc Mobility fellowship [P2FRP2_171824, P400P2_180744]
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4374]
- Infosys Science foundation under Young investigator Award
- Swiss National Science Foundation (SNF) [P400P2_180744, P2FRP2_171824] Funding Source: Swiss National Science Foundation (SNF)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1751739] Funding Source: National Science Foundation
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Charge order is now accepted as an integral constituent of cuprate high-temperature superconductors, one that is intimately related to other electronic instabilities including antiferromagnetism and superconductivity(1-11). Unlike conventional Peierls density waves, the charge correlations in cuprates have been predicted to display a rich momentum space topology depending on the underlying fermiology(12-18). However, charge order has only been observed along the high-symmetry Cu-O bond directions. Here, using resonant soft X-ray scattering, we investigate the evolution of the full momentum space topology of charge correlations in T'-(Nd,Pr)(2)CuO4 as a function of electron doping. We report that, when the parent Mott insulator is doped, charge correlations first emerge with full rotational symmetry in momentum space, indicating glassy charge density modulation in real space possibly seeded by local defects. At higher doping levels, the orientation of charge correlations is locked to the Cu-O bond directions, restoring a more conventional long-ranged bidirectional charge order. Through charge susceptibility calculations, we reproduce the evolution in topology of charge correlations across the antiferromagnetic phase boundary and propose a revised phase diagram of T'-Ln(2)CuO(4) with a superconducting region extending toward the Mott limit.
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