Three-dimensional collective charge excitations in electron-doped copper oxide superconductors

@article{ ISI:000450048400054,
Author = {Hepting, M. and Chaix, L. and Huang, E. W. and Fumagalli, R. and Peng,
   Y. Y. and Moritz, B. and Kummer, K. and Brookes, N. B. and Lee, W. C.
   and Hashimoto, M. and Sarkar, T. and He, J-F and Rotundu, C. R. and Lee,
   Y. S. and Greene, R. L. and Braicovich, L. and Ghiringhelli, G. and
   Shen, Z. X. and Devereaux, T. P. and Lee, W. S.},
Title = {{Three-dimensional collective charge excitations in electron-doped copper
   oxide superconductors}},
Journal = {{NATURE}},
Year = {{2018}},
Volume = {{563}},
Number = {{7731}},
Pages = {{374+}},
Month = {{NOV 15}},
Abstract = {{High-temperature copper oxide superconductors consist of stacked CuO2
   planes, with electronic band structures and magnetic excitations that
   are primarily two-dimensional(1,2), but with superconducting coherence
   that is three-dimensional. This dichotomy highlights the importance of
   out-of-plane charge dynamics, which has been found to be incoherent in
   the normal state(3,4) within the limited range of momenta accessible by
   optics. Here we use resonant inelastic X-ray scattering to explore the
   charge dynamics across all three dimensions of the Brillouin zone.
   Polarization analysis of recently discovered collective excitations
   (modes) in electron-doped copper oxides(5-7) reveals their charge
   origin, that is, without mixing with magnetic components(5-7). The
   excitations disperse along both the in-plane and out-of-plane
   directions, revealing its three-dimensional nature. The periodicity of
   the out-of-plane dispersion corresponds to the distance between
   neighbouring CuO2 planes rather than to the crystallographic c-axis
   lattice constant, suggesting that the interplane Coulomb interaction is
   responsible for the coherent out-of-plane charge dynamics. The observed
   properties are hallmarks of the long-sought `acoustic plasmon, which is
   a branch of distinct charge collective modes predicted for layered
   systems(8-12) and argued to play a substantial part in mediating
   high-temperature superconductivity(10-12).}},
Publisher = {{NATURE PUBLISHING GROUP}},
Address = {{MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Shen, ZX; Devereaux, TP; Lee, WS (Corresponding Author), Stanford Inst Mat & Energy Sci, SLAG Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
   Shen, ZX; Devereaux, TP; Lee, WS (Corresponding Author), Stanford Univ, Menlo Pk, CA 94025 USA.
   Hepting, M.; Chaix, L.; Huang, E. W.; Moritz, B.; He, J-F; Rotundu, C. R.; Lee, Y. S.; Shen, Z. X.; Devereaux, T. P.; Lee, W. S., Stanford Inst Mat & Energy Sci, SLAG Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
   Hepting, M.; Chaix, L.; Huang, E. W.; Moritz, B.; He, J-F; Rotundu, C. R.; Lee, Y. S.; Shen, Z. X.; Devereaux, T. P.; Lee, W. S., Stanford Univ, Menlo Pk, CA 94025 USA.
   Huang, E. W., Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Fumagalli, R.; Peng, Y. Y.; Braicovich, L.; Ghiringhelli, G., Politecn Milan, Dipartimento Fis, Milan, Italy.
   Kummer, K.; Brookes, N. B.; Braicovich, L., ESRF, Grenoble, France.
   Lee, W. C., SUNY Binghamton, Dept Phys, Binghamton, NY 13902 USA.
   Hashimoto, M., SLAG Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA USA.
   Sarkar, T.; Greene, R. L., Univ Maryland, Ctr Nanophys & Adv Mat, Dept Phys, College Pk, MD 20742 USA.
   Ghiringhelli, G., Politecn Milan, CNR SPIN, Milan, Italy.
   Chaix, L., Univ Grenoble Alpes, CNRS, Inst Neel, Grenoble, France.
   Peng, Y. Y., Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA.
   Peng, Y. Y., Univ Illinois, Seitz Mat Res Lab, Urbana, IL 61801 USA.
   He, J-F, Univ Sci & Technol China, Dept Phys, Hefei, Anhui, Peoples R China.}},
DOI = {{10.1038/s41586-018-0648-3}},
ISSN = {{0028-0836}},
EISSN = {{1476-4687}},
Keywords-Plus = {{CUPRATE SUPERCONDUCTIVITY; ENERGY; PLASMONS; GAS; ELECTRODYNAMICS}},
Research-Areas = {{Science & Technology - Other Topics}},
Web-of-Science-Categories  = {{Multidisciplinary Sciences}},
Author-Email = {{zxshen@stanford.edu
   tpd@stanford.edu
   leews@stanford.edu}},
ResearcherID-Numbers = {{Sarkar, Tarapada/J-7879-2019
   Hepting, Matthias/AAH-1592-2019
   Ghiringhelli, Giacomo/D-1159-2014
   Moritz, Brian J/D-7505-2015
   Brookes, Nicholas B/C-6718-2019
   }},
ORCID-Numbers = {{Sarkar, Tarapada/0000-0002-4204-4250
   Hepting, Matthias/0000-0002-5824-8901
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Moritz, Brian J/0000-0002-3747-8484
   Brookes, Nicholas B/0000-0002-1342-9530
   Braicovich, Lucio/0000-0001-6548-9140
   Huang, Edwin/0000-0002-6250-9529
   Chaix, Laura/0000-0002-6757-9040
   He, Junfeng/0000-0001-5584-9827}},
Funding-Acknowledgement = {{US Department of Energy (DOE), Office of Science, Basic Energy Sciences,
   Materials Sciences and Engineering DivisionUnited States Department of
   Energy (DOE) {[}DE-AC02-76SF00515]; Department of Energy, SLAC
   Laboratory Directed Research and Development {[}DE-AC02-76SF00515];
   ERC-P-ReXS project of the Fondazione CARIPLOFondazione Cariplo
   {[}2016-0790]; Regione Lombardia, in Italy; NSFNational Science
   Foundation (NSF) {[}DMR-1708334]; US DOEUnited States Department of
   Energy (DOE) {[}DE-AC02-05CH11231]}},
Funding-Text = {{This work is supported by the US Department of Energy (DOE), Office of
   Science, Basic Energy Sciences, Materials Sciences and Engineering
   Division, under contract DE-AC02-76SF00515. L.C. acknowledges support
   from the Department of Energy, SLAC Laboratory Directed Research and
   Development funder contract under DE-AC02-76SF00515. RIXS data were
   taken at beamline ID32 of the European Synchrotron Radiation Facility
   (ESRF, Grenoble, France) using the ERIXS spectrometer designed jointly
   by the ESRF and the Politecnico di Milano. G.G. and Y.Y.P. were
   supported by the by ERC-P-ReXS project (2016-0790) of the Fondazione
   CARIPLO and Regione Lombardia, in Italy. R.L.G. and T.S. acknowledge
   support from NSF award DMR-1708334. Computational work was performed on
   the Sherlock cluster at Stanford University and on resources of the
   National Energy Research Scientific Computing Center, supported by the
   US DOE under contract number DE-AC02-05CH11231.}},
Number-of-Cited-References = {{40}},
Times-Cited = {{31}},
Usage-Count-Last-180-days = {{14}},
Usage-Count-Since-2013 = {{105}},
Journal-ISO = {{Nature}},
Doc-Delivery-Number = {{HA2EY}},
Unique-ID = {{ISI:000450048400054}},
DA = {{2020-12-22}},
}