The charge and spin correlations in La1.875Ba0.125CuO4 (LBCO 1/8) are studied using Cu L3 edge resonant inelastic x-ray scattering (RIXS). The static charge order (CO) is observed at a wavevector of (0.24,0) and its charge nature confirmed by measuring the dependence of this peak on the incident x-ray polarization. The paramagnon excitation in LBCO 1/8 is then measured as it disperses through the CO wavevector. Within the experimental uncertainty no changes are observed in the paramagnon due to the static CO, and the paramagnon seems to be similar to that measured in other cuprates, which have no static CO. Given that the stripe correlation modulates both the charge and spin degrees of freedom, it is likely that subtle changes do occur in the paramagnon due to CO. Consequently, we propose that future RIXS measurements, realized with higher energy resolution and sensitivity, should be performed to test for these effects.
@article{arxiv.1305.1317,
title = {Magnetic excitations in stripe-ordered La$_{1.875}$Ba$_{0.125}$CuO$_4$ studied using resonant inelastic x-ray scattering},
author = {M. P. M. Dean and G. Dellea and M. Minola and S. B. Wilkins and R. M. Konik and G. D. Gu and M. Le Tacon and N. B. Brookes and F. Yakhou-Harris and K. Kummer and J. P. Hill and L. Braicovich and G. Ghiringhelli},
journal= {arXiv preprint arXiv:1305.1317},
year = {2013}
}