Observation of spin and charge stripe correlations in La<sub>2-x-y</sub>Eu<sub>y</sub>Sr<sub>x</sub>CuO<sub>4</sub>
ORAL
Abstract
The role of co-existing spin and charge (‘stripe’) orders in the La-based 214 cuprate superconductors has been a topic of enduring interest, and one with renewed relevance. Often presented as a prototypical stripe material, the family La2-x-yEuySrxCuO4 (LESCO) has been explored far less than other stripe candidates, with spin correlations almost completely unstudied to date. In this talk, we will present the results of our recent neutron and soft x-ray scattering studies of single crystals of LESCO grown at Illinois. These data imply the existence of parallel stripe order near 1/8 Sr-doping below critical temperatures TSO = 40K and TCO = 80K for spin and charge correlations, respectively. We will further discuss the measured temperature and Sr-doping dependence, as well as recent bulk magnetization measurements which reveal a strongly anisotropic Meissner response consistent with the decoupling of superconductivity between CuO2 planes. The collective results will be discussed in the context of pair-density-wave theories and the coupling between superconductivity and alternate orders in the cuprates.
*The crystal growth and neutron work presented was funded by DOE Office of Basic Energy Sciences, Grant Number DE-SC001236. X-ray work was funded by DE-FG02-06ER46285.
–
Presenters
-
Alexander Zakrzewski
- Univ of Illinois - Urbana
- Department of Physics, University of Illinois
- University of Illinois at Urbana-Champaign