Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 57: Superconductivity: Properties and Electronic Structure
TT 57.3: Talk
Thursday, April 4, 2019, 15:30–15:45, H7
Three-dimensional collective charge excitations in electron-doped copper oxide superconductors — •Matthias Hepting1,9, Laura Chaix1, Edwin W. Huang1,2, Roberto Fumagalli3, Ying Y. Peng3, Brian Moritz1, Kurt Kummer4, Nicholas B. Brookes4, Wei Cheng Lee5, Makoto Hashimoto6, Tarapada Sarkar7, Jun-Feng He1, Costel R. Rotundu1, Young S. Lee1, Richard L. Greene7, Lucio Braicovich3,4, Giacomo Ghiringhelli3,8, Zhi Xun Shen1, Thomas P. Devereaux1, and Wei Sheng Lee1 — 1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, USA — 2Department of Physics, Stanford University, USA — 3Dipartimento di Fisica, Politecnico di Milano, Italy — 4European Synchrotron Radiation Facility (ESRF), France — 5Department of Physics, Binghamton University, USA — 6Stanford Synchrotron Radiation Lightsource, SLAC, USA — 7Center for Nanophysics and Advanced Materials, University of Maryland, USA — 8CNR-SPIN, Politecnico di Milano, Italy — 9Max-Planck-Institute for Solid State Research, Germany
We report on three-dimensional charge collective modes observed in electron-doped copper oxides by resonant inelastic X-ray scattering (RIXS) [1]. The modes are reminiscent of acoustic plasmons predicted for layered copper oxides and suggested to play a substantial role in mediating high-temperature superconductivity.
M. Hepting et al., Nature 563, 374-378 (2018)