Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 57: Superconductivity: Properties and Electronic Structure

TT 57.3: Vortrag

Donnerstag, 4. April 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 Lee11Stanford 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)

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