Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La2−xCexCuO4±δ
I. M. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, R. L. Greene
DOI 10.1103/PhysRevB.95.115125 · 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
We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La2−xCexCuO4 (LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above Tc, we observe fluence-dependent relaxation rates that begin at a temperature similar to the one where transport measurements first show signatures of antiferromagnetic correlations. Upon suppressing superconductivity with a magnetic field, it is found that the fluence and temperature dependence of relaxation rates are consistent with bimolecular recombination of electrons and holes across a gap (2ΔAF) originating from antiferromagnetic correlations which comprise the pseudogap in electron-doped cuprates. This can be used to learn about coupling between electrons and high-energy (ω>2ΔAF) excitations in these compounds and set limits on the time scales on which antiferromagnetic correlations are static.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | unknown |
| La2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
Similar papers
Quantum criticality tuned by magnetic field in optimally electron-doped cuprate thin films
similarity 0.97Xu Zhang et al.
Source status unknown — claims are unverified
Transport properties of electron-doped La2−xCexCuO4 cuprate thin films
similarity 0.97H. Wu et al.
Source status unknown — claims are unverified
Electron-doped superconductor La2−xCexCuO4: Preparation of thin films and modified doping range for superconductivity
similarity 0.96A. Sawa et al.
Source status unknown — claims are unverified
Anomalous enhancement of the superconducting transition temperature of electron-doped La2−xCexCuO4 and Pr2−xCexCuO4 cuprate heterostructures
similarity 0.96K. Jin et al.
Source status unknown — claims are unverified
BCS d-wave behavior in the terahertz electrodynamic response of electron-doped cuprate superconductors
similarity 0.95Zhenisbek Tagay et al.
Source status unknown — claims are unverified
Phase Diagram of the Electron-Doped La2−xCexCuO4 Cuprate Superconductor from Andreev Bound States at Grain Boundary Junctions
similarity 0.95M. Wagenknecht et al.
Source status unknown — claims are unverified