Probing the energy gap of high-temperature cuprate superconductors by resonant inelastic x-ray scattering

@article{ ISI:000463712700001,
Author = {Suzuki, Hakuto and Minola, Matteo and Lu, Yi and Peng, Yingying and
   Fumagalli, Roberto and Lefrancois, Emilie and Loew, Toshinao and Porras,
   Juan and Kummer, Kurt and Betto, Davide and Ishida, Shigeyuki and
   Eisaki, Hiroshi and Hu, Cheng and Zhou, Xingjiang and Haverkort, Maurits
   W. and Brookes, Nicholas B. and Braicovich, Lucio and Ghiringhelli,
   Giacomo and Le Tacon, Matthieu and Keimer, Bernhard},
Title = {{Probing the energy gap of high-temperature cuprate superconductors by
   resonant inelastic x-ray scattering}},
Journal = {{NPJ QUANTUM MATERIALS}},
Year = {{2018}},
Volume = {{3}},
Month = {{DEC 14}},
Abstract = {{The determination of the symmetry of the energy gap is crucial for
   research on the microscopic mechanisms of unconventional
   superconductivity. Here, we demonstrate experimentally that
   high-resolution resonant inelastic X-ray scattering at the Cu L-3 edge
   can serve as a momentum-resolved, bulk-sensitive probe of the
   superconducting gap. We studied two optimally doped cuprates
   Bi2Sr2CaCu2O8+delta and Bi2Sr2Ca2Cu3O10+delta, in which we observe a
   strongly momentum dependent reduction of the spectral weight upon
   entering the superconducting state, with a maximum for momenta
   connecting antinodal regions of the Fermi surface. Based on a comparison
   with the calculated charge susceptibility and electronic Raman
   scattering data, we interpret our observation as a renormalization of
   the non-local charge susceptibility due to the superconducting gap
   opening. Our data demonstrate the methodological potential of resonant
   inelastic X-ray scattering as a versatile probe of the energy gap of
   high-temperature superconductors, including buried interfaces in
   heterostructures which are inaccessible to angle-resolved photoemission
   spectroscopy.}},
Publisher = {{NATURE PUBLISHING GROUP}},
Address = {{MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Suzuki, H; Keimer, B (Corresponding Author), Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
   Suzuki, Hakuto; Minola, Matteo; Lu, Yi; Lefrancois, Emilie; Loew, Toshinao; Porras, Juan; Keimer, Bernhard, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
   Peng, Yingying; Fumagalli, Roberto; Braicovich, Lucio; Ghiringhelli, Giacomo, Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
   Kummer, Kurt; Betto, Davide; Brookes, Nicholas B.; Braicovich, Lucio, European Synchrotron Radiat Facil, 71 Ave Martyrs, F-38043 Grenoble, France.
   Ishida, Shigeyuki; Eisaki, Hiroshi, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan.
   Hu, Cheng; Zhou, Xingjiang, Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
   Haverkort, Maurits W., Heidelberg Univ, Inst Theoret Phys, Philosophenweg 19, D-69120 Heidelberg, Germany.
   Le Tacon, Matthieu, Karlsruher Inst Technol, Inst Festkorperphys, Hermann v Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany.}},
DOI = {{10.1038/s41535-018-0139-7}},
Article-Number = {{65}},
EISSN = {{2397-4648}},
Keywords-Plus = {{ELECTRONIC RAMAN-SCATTERING; INPLANE SPECTRAL WEIGHT; SINGLE-CRYSTAL
   GROWTH; T-C; DOPING DEPENDENCE; EXCITATIONS; BI2SR2CACU2O8; STATE}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Quantum Science & Technology;
   Physics, Applied; Physics, Condensed Matter}},
Author-Email = {{h.suzuki@fkf.mpg.de
   b.keimer@fkf.mpg.de}},
ResearcherID-Numbers = {{HU, Cheng/AAZ-7539-2020
   Lefrancois, Emilie/Q-4316-2019
   Lu, Yi/G-9881-2014
   , Le Tacon Matthieu/D-8023-2011
   Ghiringhelli, Giacomo/D-1159-2014
   Ishida, Shigeyuki/L-6231-2018
   peng, yingying/K-1805-2015
   Haverkort, Maurits W./D-2319-2009
   }},
ORCID-Numbers = {{HU, Cheng/0000-0003-2335-7806
   Lefrancois, Emilie/0000-0002-8959-7848
   Lu, Yi/0000-0001-9445-641X
   , Le Tacon Matthieu/0000-0002-5838-3724
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Ishida, Shigeyuki/0000-0001-9445-8079
   Braicovich, Lucio/0000-0001-6548-9140
   peng, yingying/0000-0002-2657-3590
   Suzuki, Hakuto/0000-0003-2973-0579
   Haverkort, Maurits W./0000-0002-7216-3146
   Minola, Matteo/0000-0003-4084-0664}},
Funding-Acknowledgement = {{JSPSMinistry of Education, Culture, Sports, Science and Technology,
   Japan (MEXT)Japan Society for the Promotion of Science; Alexander von
   Humboldt FoundationAlexander von Humboldt Foundation; Fondazione
   CARIPLOFondazione Cariplo; Regione Lombardia, Italy, through the
   ERC-P-ReXS project {[}2016-0790]}},
Funding-Text = {{H.S. acknowledges financial support from the JSPS Research Fellowship
   for Research Abroad. M.M. was partially supported by the Alexander von
   Humboldt Foundation. G.G. and Y.Y.P. were partially supported by the
   Fondazione CARIPLO and Regione Lombardia, Italy, through the ERC-P-ReXS
   project (2016-0790).}},
Number-of-Cited-References = {{42}},
Times-Cited = {{5}},
Usage-Count-Last-180-days = {{2}},
Usage-Count-Since-2013 = {{7}},
Journal-ISO = {{npj Quantum Mater.}},
Doc-Delivery-Number = {{HS2SQ}},
Unique-ID = {{ISI:000463712700001}},
OA = {{DOAJ Gold, Green Published}},
DA = {{2020-12-22}},
}