Nematic correlation length in optimally doped Ba(Fe0.94Co0.06)2As2
Nematicity is ubiquitous in electronic phases of high-Tc superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they have been restricted to uniform or momentum averaged fluctuations. In previous experiments using inelastic neutron and x-ray scattering we have measured the softening of the in-plane polarized transverse acoustic phonon along the [010] direction, which is sensitive to the shear modulus C66 and, hence, to nematic fluctuations. We showed [Weber PRB 2018] that these measurements can be used to extract the nematic correlation length ξ in Ba(Fe0.94Co0.06)2As2. However, a precise determination and clear connection of the neutron scattering results to ultrasound data at q = 0, necessitate high-resolution experiments only possible on a high-flux cold triple-axis spectrometer such as THALES. Hence, we ask for 7 days of beam time in order to measure the transverse acoustic dispersion at very low energies and momenta.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
WEBER Frank; LI Zehua and STEFFENS Paul. (2020). Nematic correlation length in optimally doped Ba(Fe0.94Co0.06)2As2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-522
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.