Prevailing Charge Order in Overdoped La 2 – x Sr x CuO 4 beyond the Superconducting Dome
Journal Article
·
· Physical Review Letters
- Peking Univ., Beijing (China)
- National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
- Zhejiang Univ., Hangzhou (China)
- Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy
- Clemson Univ., SC (United States)
- Harvard Univ., Cambridge, MA (United States)
- Clemson Univ., SC (United States); Emory Univ., Atlanta, GA (United States)
- Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
The extremely overdoped cuprates are generally considered to be Fermi liquid metals without exotic orders, whereas the underdoped cuprates harbor intertwined states. Contrary to this conventional wisdom, using Cu L3-edge and O K-edge resonant x-ray scattering, we reveal a charge order (CO) correlation in overdoped La2–xSrxCuO4 (0.35 ≤ x ≤0.6) beyond the superconducting dome. This CO has a periodicity of ~6 lattice units with correlation lengths of ~20 lattice units. It shows similar in-plane momentum and polarization dependence and dispersive excitations as the CO of underdoped cuprates, but its maximum intensity differs along the c direction and persists up to 300 K. This CO correlation cannot be explained by the Fermi surface instability and its origin remains to be understood. Finally, our results suggest that CO is prevailing in the overdoped metallic regime and requires a reassessment of the picture of overdoped cuprates as weakly correlated Fermi liquids.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2423059
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 131; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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