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. doi:10.1038/NPHYS2041.
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Basic information
Original name Intense paramagnon excitations in a large family of high-temperature superconductors
Name in Czech Intenzivní paramagnonové excitace v široké třídě vyskoteplotních supravodičů
Authors 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.
Edition Nature Physics, London, Nature Publishing Group, 2011, 1745-2473.
Other information
Original language English
Type of outcome article in a journal
Field of Study 10302 Condensed matter physics
Country of publisher United Kingdom
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 18.967
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1038/NPHYS2041
UT WoS 000294485400021
Keywords (in Czech) vysokoteplotní supravodiče; spinové excitace
Keywords in English high-temperature superconductors; spin excitations
Tags International impact, Reviewed
Changed by Changed by: Mgr. Jiří Chaloupka, Ph.D., učo 53310. Changed: 4/1/2012 14:33.
Abstract
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.
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