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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