Acoustic plasmons and conducting carriers in hole-doped cuprate superconductors
A. Singh, H. Y. Huang, Christopher Lane, J. H. Li, J. Okamoto, S. Komiya, Robert S. Markiewicz, Arun Bansil, T. K. Lee, A. Fujimori, C. T. Chen, D. J. Huang
DOI 10.1103/PhysRevB.105.235105 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The layered crystal structures of cuprates enable collective charge excitations fundamentally different from those of three-dimensional metals. Acoustic plasmons have been observed in electron-doped cuprates by resonant inelastic x-ray scattering (RIXS); in contrast, the characteristics of acoustic plasmons in hole-doped cuprates are under debate, despite extensive measurements. This contrast led us to investigate the charge excitations of hole-doped cuprate La2−xSrxCuO4. Here we present incident-energy-dependent RIXS measurements and calculations of collective charge response via the loss function to reconcile the issues above. Our results provide evidence for the acoustic plasmons of Zhang-Rice singlet (ZRS), which has a character of the Cu 3dx2−y2 strongly hybridized with the O 2p orbitals; the metallic behavior is implied to result from the movement of ZRS rather than the simple hopping of O 2p holes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
Similar papers
Quantum Fluctuations of Charge Order Induce Phonon Softening in a Superconducting Cuprate
similarity 0.96H. Y. Huang et al.
Source status unknown — claims are unverified
Critical Doping for the Onset of Fermi-Surface Reconstruction by Charge-Density-Wave Order in the Cuprate Superconductor La2−xSrxCuO4
similarity 0.96S. Badoux et al.
Source status unknown — claims are unverified
Effects of carrier concentration on the superfluid density of high-Tc cuprates
similarity 0.95C. Panagopoulos et al.
Source status unknown — claims are unverified
Antiferromagnetic spin correlations in insulating, metallic, and superconducting La2−xSrxCuO4
similarity 0.95R. J. Birgeneau et al.
Source status unknown — claims are unverified
Quantum Phase Transition in the Magnetic-Field-Induced Normal State of Optimum-Doped High-Tc Cuprate Superconductors at Low Temperatures
similarity 0.95F. F. Balakirev et al.
Source status unknown — claims are unverified
Weak-coupling d-wave BCS superconductivity and unpaired electrons in overdoped La2−xSrxCuO4 single crystals
similarity 0.95Yue Wang et al.
Source status unknown — claims are unverified