| LE TACON, Mathieu, G. GHIRINGHELLI, Jiří CHALOUPKA, M. MORETTI SALA, V. HINKOV, M. W. HAVERKORT, M. MINOLA, M. BAKR, K. J. ZHOU, S. BLANCO-CANOSA, C. MONNEY, Y. T. SONG, G. L. SUN, C. T. LIN, G. M. DE LUCA, M. SALLUZZO, Giniyat KHALIULLIN, T. SCHMITT, L. BRAICOVICH and B. KEIMER. Intense paramagnon excitations in a large family of high-temperature superconductors. Nature Physics. London: Nature Publishing Group, 2011, vol. 7, No 1, p. 725-730. ISSN 1745-2473. Available from: https://dx.doi.org/10.1038/NPHYS2041. |
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@article{949331,
author = {Le Tacon, Mathieu and Ghiringhelli, G. and Chaloupka, Jiří and Moretti Sala, M. and Hinkov, V. and Haverkort, M. W. and Minola, M. and Bakr, M. and Zhou, K. J. and BlancoandCanosa, S. and Monney, C. and Song, Y. T. and Sun, G. L. and Lin, C. T. and De Luca, G. M. and Salluzzo, M. and Khaliullin, Giniyat and Schmitt, T. and Braicovich, L. and Keimer, B.},
article_location = {London},
article_number = {1},
doi = {http://dx.doi.org/10.1038/NPHYS2041},
keywords = {high-temperature superconductors; spin excitations},
language = {eng},
issn = {1745-2473},
journal = {Nature Physics},
title = {Intense paramagnon excitations in a large family of high-temperature superconductors},
url = {http://www.nature.com/nphys/journal/v7/n9/abs/nphys2041.html},
volume = {7},
year = {2011}
}
TY - JOUR
ID - 949331
AU - Le Tacon, Mathieu - Ghiringhelli, G. - Chaloupka, Jiří - Moretti Sala, M. - Hinkov, V. - Haverkort, M. W. - Minola, M. - Bakr, M. - Zhou, K. J. - Blanco-Canosa, S. - Monney, C. - Song, Y. T. - Sun, G. L. - Lin, C. T. - De Luca, G. M. - Salluzzo, M. - Khaliullin, Giniyat - Schmitt, T. - Braicovich, L. - Keimer, B.
PY - 2011
TI - Intense paramagnon excitations in a large family of high-temperature superconductors
JF - Nature Physics
VL - 7
IS - 1
SP - 725-730
EP - 725-730
PB - Nature Publishing Group
SN - 17452473
KW - high-temperature superconductors
KW - spin excitations
UR - http://www.nature.com/nphys/journal/v7/n9/abs/nphys2041.html
N2 - In the search for the mechanism of high-temperature superconductivity, intense research has been focused on the evolution of the spin excitation spectrum on doping from the antiferromagnetic insulating to the superconducting state of the cuprates. Because of technical limitations, the experimental investigation of doped cuprates has been largely focused on low-energy excitations in a small range of momentum space. Here we use resonant inelastic X-ray scattering to show that a large family of superconductors, encompassing underdoped YBa2Cu4O8 and overdoped YBa2Cu3O7, exhibits damped spin excitations (paramagnons) with dispersions and spectral weights closely similar to those of magnons in undoped cuprates. The comprehensive experimental description of this surprisingly simple spectrum enables quantitative tests of magnetic Cooper pairing models. A numerical solution of the Eliashberg equations for the magnetic spectrum of YBa2Cu3O7 reproduces its superconducting transition temperature within a factor of two, a level of agreement comparable to that of Eliashberg theories of conventional superconductors.
ER -
LE TACON, Mathieu, G. GHIRINGHELLI, Jiří CHALOUPKA, M. MORETTI SALA, V. HINKOV, M. W. HAVERKORT, M. MINOLA, M. BAKR, K. J. ZHOU, S. BLANCO-CANOSA, C. MONNEY, Y. T. SONG, G. L. SUN, C. T. LIN, G. M. DE LUCA, M. SALLUZZO, Giniyat KHALIULLIN, T. SCHMITT, L. BRAICOVICH and B. KEIMER. Intense paramagnon excitations in a large family of high-temperature superconductors. \textit{Nature Physics}. London: Nature Publishing Group, 2011, vol.~7, No~1, p.~725-730. ISSN~1745-2473. Available from: https://dx.doi.org/10.1038/NPHYS2041.
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