High Energy Magnetic Excitations of Bi2Sr2CaCuO8.15 Revealed by Resonant Inelastic X-ray Scattering
Hsiao-Yu Huang1,2*, Ru-Pan Wang2, Wen-Bin Wu2, Zhi-Ying Chen2,3, Wei-Sheng Lee4, Chien-Te Chen2, Di-Jing Huang2,3
1Doctor Program of Science and Technology of Synchrotron Light Source, National Tsing Hua University, Hsinchu, Taiwan
2National Synchrotron Radiation Research Center, Hsinchu, Taiwan
3Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
4SIMES, SLAC National Accelerator Laboratory, CA, United States of America
* presenting author:Hsiao-Yu Huang, email:physh.physics@gmail.com
We measured the RIXS spectra of optimally doped cuprate superconductor Bi2Sr2CaCuO8.15 (Bi-2212) at the AGM-AGS inelastic x-ray scattering beamline (05A at the Taiwan Light Source, NSRRC). The Cu L3-edge RIXS spectra of energy loss below 1 eV are dominated by broad and dispersive magnetic excitations. The features of these magnetic excitations are similar to those of spin-wave-like paramagnons. On the contrary, the RIXS spectra measured across O K-edge show no contribution from magnetic excitations. We only observed different dd excitations with different incident photon energies in the pre-edge of O K-edge.

Keywords: Cuprate superconductor, RIXS