Low-energy quasi-circular electron correlations with charge order wavelength in Bi 2 Sr 2 CaCu 2 O 8+δ

Author:

Scott Kirsty12ORCID,Kisiel Elliot3ORCID,Boyle Timothy J.124,Basak Rourav3ORCID,Jargot Gaëtan5ORCID,Das Sarmistha3ORCID,Agrestini Stefano6ORCID,Garcia-Fernandez Mirian6ORCID,Choi Jaewon6ORCID,Pelliciari Jonathan7ORCID,Li Jiemin7ORCID,Chuang Yi-De8ORCID,Zhong Ruidan9,Schneeloch John A.9ORCID,Gu Genda9ORCID,Légaré François5,Kemper Alexander F.10,Zhou Ke-Jin6,Bisogni Valentina7,Blanco-Canosa Santiago1112,Frano Alex313,Boschini Fabio514,da Silva Neto Eduardo H.12415ORCID

Affiliation:

1. Department of Physics, Yale University, New Haven, CT 06520, USA.

2. Energy Sciences Institute, Yale University, West Haven, CT 06516, USA.

3. Department of Physics, University of California San Diego, La Jolla, CA 92093, USA.

4. Department of Physics and Astronomy, University of California, Davis, CA 95616, USA.

5. Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec J3X 1S2, Canada.

6. Diamond Light Source, Harwell Campus, Didcot OX11 0DE, UK.

7. National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.

8. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

9. Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY 11973, USA.

10. Department of Physics, North Carolina State University, Raleigh, NC 27695, USA.

11. Donostia International Physics Center (DIPC), 20018 Donostia–San Sebastian, Basque Country, Spain.

12. IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain.

13. Canadian Institute for Advanced Research, Toronto, ON M5G 1M1, Canada.

14. Quantum Matter Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

15. Department of Applied Physics, Yale University, New Haven, CT 06520, USA.

Abstract

Most resonant inelastic x-ray scattering (RIXS) studies of dynamic charge order correlations in the cuprates have focused on the high-symmetry directions of the copper oxide plane. However, scattering along other in-plane directions should not be ignored as it may help understand, for example, the origin of charge order correlations or the isotropic scattering resulting in strange metal behavior. Our RIXS experiments reveal dynamic charge correlations over the q x -q y scattering plane in underdoped Bi 2 Sr 2 CaCu 2 O 8+δ . Tracking the softening of the RIXS-measured bond-stretching phonon, we show that these dynamic correlations exist at energies below approximately 70 meV and are centered around a quasi-circular manifold in the q x -q y scattering plane with radius equal to the magnitude of the charge order wave vector, q CO . This phonon-tracking procedure also allows us to rule out fluctuations of short-range directional charge order (i.e., centered around [ q x = ± q CO , q y = 0] and [ q x = 0, q y = ± q CO ]) as the origin of the observed correlations.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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