Identification of a characteristic doping for charge order phenomena in Bi-2212 cuprates via RIXS
Artikel i vetenskaplig tidskrift, 2022

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 L3 edge. As doping increases, the CO wave vector decreases, saturating near a commensurate value of 0.25 reciprocal lattice unit beyond a characteristic doping pc, where the correlation length becomes shorter than the apparent periodicity (4a0). Such behavior is indicative of the fluctuating nature of the CO; the proliferation of CO excitations in the superconducting state also appears strongest at pc, consistent with expected behavior at a CO QCP. Intriguingly, pc appears to be near optimal doping, where the superconducting transition temperature Tc is maximal.

Författare

Haiyu Lu

Stanford University

Makoto Hashimoto

Stanford Synchrotron Radiation Laboratory

Su Di Chen

Stanford University

Shigeyuki Ishida

National Institute of Advanced Industrial Science and Technology (AIST)

Dongjoon Song

National Institute of Advanced Industrial Science and Technology (AIST)

H. Eisaki

National Institute of Advanced Industrial Science and Technology (AIST)

Abhishek Nag

Diamond Light Source

M. Garcia-Fernandez

Diamond Light Source

Riccardo Arpaia

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Politecnico di Milano

Giacomo Ghiringhelli

Politecnico di Milano

Lucio Braicovich

Politecnico di Milano

European Synchrotron Radiation Facility (ESRF)

Jan Zaanen

Instituut-Lorentz for Theoretical Physics, Leiden

Brian Moritz

Stanford University

Kurt Kummer

European Synchrotron Radiation Facility (ESRF)

Nicholas B. Brookes

European Synchrotron Radiation Facility (ESRF)

Ke Jin Zhou

Diamond Light Source

Zhi Xun Shen

Stanford University

Thomas P. Devereaux

Stanford University

Wei Sheng Lee

Stanford University

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 106 15 155109

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.106.155109

Mer information

Senast uppdaterat

2022-10-25