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Identification of a characteristic doping for charge order phenomena in Bi-2212 cuprates via RIXS

DOI: 10.1103/PhysRevB.106.155109 DOI Help

Authors: Haiyu Lu (SLAC National Accelerator Laboratory; Stanford University) , Makoto Hashimoto (Stanford Synchrotron Radiation Lightsource) , Su-Di Chen (SLAC National Accelerator Laboratory; Stanford University) , Shigeyuki Ishida (National Institute of Advanced Industrial Science and Technology) , Dongjoon Song (National Institute of Advanced Industrial Science and Technology) , Hiroshi Eisaki (National Institute of Advanced Industrial Science and Technology) , Abhishek Nag (Diamond Light Source) , Mirian Garcia-Fernandez (Diamond Light Source) , Riccardo Arpaia (Politecnico di Milano; Chalmers University of Technology) , Giacomo Ghiringhelli (Politecnico di Milano; CNR-SPIN) , Lucio Braicovich (Politecnico di Milano; European Synchrotron Radiation Facility (ESRF)) , Jan Zaanen (Leiden University) , Brian Moritz (SLAC National Accelerator Laboratory) , Kurt Kummer (European Synchrotron Radiation Facility (ESRF)) , Nicholas B. Brookes (European Synchrotron Radiation Facility (ESRF)) , Ke-Jin Zhou (Diamond Light Source) , Zhi-Xun Shen (SLAC National Accelerator Laboratory; Stanford University) , Thomas P. Devereaux (SLAC National Accelerator Laboratory; Stanford University) , Wei-Sheng Lee (SLAC National Accelerator Laboratory)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 106

State: Published (Approved)
Published: October 2022
Diamond Proposal Number(s): 22009

Abstract: Identifying quantum critical points (QCPs) and their associated fluctuations may hold the key to unraveling the unusual electronic phenomena observed in cuprate superconductors. Recently, signatures of quantum fluctuations associated with charge order (CO) have been inferred from the anomalous enhancement of CO excitations that accompany the reduction of the CO order parameter in the superconducting state. To gain more insight into the interplay between CO and superconductivity, here we investigate the doping dependence of this phenomenon throughout the Bi-2212 cuprate phase diagram using resonant inelastic x-ray scattering (RIXS) at the Cu L 3 edge. As doping increases, the CO wave vector decreases, saturating near a commensurate value of 0.25 reciprocal lattice unit beyond a characteristic doping p c , where the correlation length becomes shorter than the apparent periodicity ( 4 a 0 ). Such behavior is indicative of the fluctuating nature of the CO; the proliferation of CO excitations in the superconducting state also appears strongest at p c , consistent with expected behavior at a CO QCP. Intriguingly, p c appears to be near optimal doping, where the superconducting transition temperature T c is maximal.

Journal Keywords: Charge order; Superconductivity; Cuprates; Strongly correlated systems; Resonant inelastic x-ray scattering

Subject Areas: Materials, Physics

Instruments: I21-Resonant Inelastic X-ray Scattering (RIXS)

Other Facilities: ID32-RIXS at ESRF

Added On: 05/10/2022 09:49

Discipline Tags:

Superconductors Quantum Materials Physics Materials Science

Technical Tags:

Scattering Resonant Inelastic X-ray Scattering (RIXS)