by Dean, M. P. M., Dellea, G., Springell, R. S., Yakhou-Harris, F., Kummer, K., Brookes, N. B., Liu, X., Sun, Y-J., Strle, J., Schmitt, T., Braicovich, L., Ghiringhelli, G., Bozovic, I. and Hill, J. P.
Abstract:
One of the most intensely studied scenarios of high-temperature superconductivity (HTS) postulates pairing by exchange of magnetic excitations(1). Indeed, such excitations have been observed up to optimal doping in the cuprates(2-7). In the heavily overdoped regime, neutron scattering measurements indicate that magnetic excitations have effectively disappeared(8-10), and this has been argued to cause the demise of HTS with overdoping(1,8,10). Here we use resonant inelastic X-ray scattering, which is sensitive to complementary parts of reciprocal space, to measure the evolution of the magnetic excitations in La2-xSrxCuO4 across the entire phase diagram, from a strongly correlated insulator (x = 0) to a non-superconducting metal (x = 0.40). For x = 0, well-defined magnon excitations are observed(11). These magnons broaden with doping, but they persist with a similar dispersion and comparable intensity all the way to the non-superconducting, heavily overdoped metallic phase. The destruction of HTS with overdoping is therefore caused neither by the general disappearance nor by the overall softening of magnetic excitations. Other factors, such as the redistribution of spectral weight, must be considered.
Reference:
Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal (Dean, M. P. M., Dellea, G., Springell, R. S., Yakhou-Harris, F., Kummer, K., Brookes, N. B., Liu, X., Sun, Y-J., Strle, J., Schmitt, T., Braicovich, L., Ghiringhelli, G., Bozovic, I. and Hill, J. P.), In NATURE MATERIALS, NATURE PUBLISHING GROUP, volume 12, 2013.
Bibtex Entry:
@article{ ISI:000326099300016,
Author = {Dean, M. P. M. and Dellea, G. and Springell, R. S. and Yakhou-Harris, F.
   and Kummer, K. and Brookes, N. B. and Liu, X. and Sun, Y-J. and Strle,
   J. and Schmitt, T. and Braicovich, L. and Ghiringhelli, G. and Bozovic,
   I. and Hill, J. P.},
Title = {{Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped
   insulator to the heavily overdoped non-superconducting metal}},
Journal = {{NATURE MATERIALS}},
Year = {{2013}},
Volume = {{12}},
Number = {{11}},
Pages = {{1018-1022}},
Month = {{NOV}},
Abstract = {{One of the most intensely studied scenarios of high-temperature
   superconductivity (HTS) postulates pairing by exchange of magnetic
   excitations(1). Indeed, such excitations have been observed up to
   optimal doping in the cuprates(2-7). In the heavily overdoped regime,
   neutron scattering measurements indicate that magnetic excitations have
   effectively disappeared(8-10), and this has been argued to cause the
   demise of HTS with overdoping(1,8,10). Here we use resonant inelastic
   X-ray scattering, which is sensitive to complementary parts of
   reciprocal space, to measure the evolution of the magnetic excitations
   in La2-xSrxCuO4 across the entire phase diagram, from a strongly
   correlated insulator (x = 0) to a non-superconducting metal (x = 0.40).
   For x = 0, well-defined magnon excitations are observed(11). These
   magnons broaden with doping, but they persist with a similar dispersion
   and comparable intensity all the way to the non-superconducting, heavily
   overdoped metallic phase. The destruction of HTS with overdoping is
   therefore caused neither by the general disappearance nor by the overall
   softening of magnetic excitations. Other factors, such as the
   redistribution of spectral weight, must be considered.}},
Publisher = {{NATURE PUBLISHING GROUP}},
Address = {{MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Dean, MPM (Corresponding Author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
   Dean, M. P. M.; Liu, X.; Sun, Y-J.; Strle, J.; Bozovic, I.; Hill, J. P., Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
   Dellea, G.; Braicovich, L.; Ghiringhelli, G., Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy.
   Springell, R. S., Univ Bristol, Interface Anal Ctr, Royal Commiss Exhibit Res Fellow 1851, Bristol BS2 8BS, Avon, England.
   Yakhou-Harris, F.; Kummer, K.; Brookes, N. B., European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Liu, X.; Sun, Y-J., Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
   Liu, X.; Sun, Y-J., Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
   Strle, J., Jozef Stefan Inst, Dept Complex Matter, Ljubljana 1000, Slovenia.
   Schmitt, T., Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.}},
DOI = {{10.1038/NMAT3723}},
ISSN = {{1476-1122}},
EISSN = {{1476-4660}},
Keywords-Plus = {{ENERGY SPIN EXCITATIONS; X-RAY-SCATTERING; SUPERCONDUCTORS; DYNAMICS;
   STRIPES}},
Research-Areas = {{Chemistry; Materials Science; Physics}},
Web-of-Science-Categories  = {{Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter}},
Author-Email = {{mdean@bnl.gov}},
ResearcherID-Numbers = {{Ghiringhelli, Giacomo/D-1159-2014
   Schmitt, Thorsten/A-7025-2010
   Dean, Mark/B-4541-2011
   Brookes, Nicholas B/C-6718-2019
   Dean, Mark/Y-4832-2019
   }},
ORCID-Numbers = {{Ghiringhelli, Giacomo/0000-0003-0867-7748
   Dean, Mark/0000-0001-5139-3543
   Brookes, Nicholas B/0000-0002-1342-9530
   Dean, Mark/0000-0001-5139-3543
   Braicovich, Lucio/0000-0001-6548-9140}},
Funding-Acknowledgement = {{Center for Emergent Superconductivity, an Energy Frontier Research
   Center; US DOE, Office of Basic Energy SciencesUnited States Department
   of Energy (DOE); Office of Basic Energy Sciences, Division of Materials
   Science and Engineering, US Department of EnergyUnited States Department
   of Energy (DOE) {[}DEAC02-98CH10886]; Italian Ministry of Research
   MIURMinistry of Education, Universities and Research (MIUR) {[}PRIN-
   20094W2LAY]}},
Funding-Text = {{M.P.M.D. and J.P.H. are supported by the Center for Emergent
   Superconductivity, an Energy Frontier Research Center funded by the US
   DOE, Office of Basic Energy Sciences. Work at Brookhaven National
   Laboratory was supported by the Office of Basic Energy Sciences,
   Division of Materials Science and Engineering, US Department of Energy
   under Award No. DEAC02-98CH10886. This work was also partially supported
   by the Italian Ministry of Research MIUR (Grant No. PRIN- 20094W2LAY).
   The experiment was performed using the AXES instrument at ID08 at the
   European Synchrotron Radiation Facility. We acknowledge insightful,
   continuing discussions with A. James, R. Konik and J. Tranquada.}},
Number-of-Cited-References = {{32}},
Times-Cited = {{149}},
Usage-Count-Last-180-days = {{4}},
Usage-Count-Since-2013 = {{109}},
Journal-ISO = {{Nat. Mater.}},
Doc-Delivery-Number = {{240LZ}},
Unique-ID = {{ISI:000326099300016}},
DA = {{2020-12-22}},
}

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