An important feature of the high-transition-temperature (high-Tc)
copper oxide superconductors is the magnetism that results from the
spins associated with the incomplete outer electronic shells (3d9)
of the copper ions. Fluctuations of these spins give rise to magnetic
excitations of the material, and might mediate the electron pairing
that leads to superconductivity. If the mechanism for high-Tc superconductivity
is the same for all copper oxide systems, their spin fluctuations
should be universal. But so far, theopposite has seemed to be the
case: neutron scattering data reveal clear differences between the
spin fluctuations for two major classes of high-Tc materials, La2-xSrxCuO4
(refs 1-3) and YBa2Cu3O7-x (refs 4-6), whose respective building
blocks are CuO2 layers and bilayers. Here we report two-dimensional
neutron-scattering imaging of YBa2Cu3O6.6, which reveals that the
low-frequency magnetic excitations are virtually identical to those
of similarly doped La2-xSrxCuO4. Thus, the high-temperature (Tc 92
K) superconductivity of the former materials may be related to spatially
coherent low-frequency spin excitations that were previously thought
to be unique to the lower-Tc (<40 K) single-layer La2-xSrxCuO4 family.
%0 Journal Article
%1 Mook1998
%A Mook, H. A.
%A Dai, Pengcheng
%A Hayden, S. M.
%A Aeppli, G.
%A Perring, T. G.
%A Dogan, F.
%D 1998
%J Nature
%K imported
%N 6702
%P 580--582
%T Spin fluctuations in YBa$_2$Cu$_3$O$_6.6$
%U http://dx.doi.org/10.1038/26931
%V 395
%X An important feature of the high-transition-temperature (high-Tc)
copper oxide superconductors is the magnetism that results from the
spins associated with the incomplete outer electronic shells (3d9)
of the copper ions. Fluctuations of these spins give rise to magnetic
excitations of the material, and might mediate the electron pairing
that leads to superconductivity. If the mechanism for high-Tc superconductivity
is the same for all copper oxide systems, their spin fluctuations
should be universal. But so far, theopposite has seemed to be the
case: neutron scattering data reveal clear differences between the
spin fluctuations for two major classes of high-Tc materials, La2-xSrxCuO4
(refs 1-3) and YBa2Cu3O7-x (refs 4-6), whose respective building
blocks are CuO2 layers and bilayers. Here we report two-dimensional
neutron-scattering imaging of YBa2Cu3O6.6, which reveals that the
low-frequency magnetic excitations are virtually identical to those
of similarly doped La2-xSrxCuO4. Thus, the high-temperature (Tc 92
K) superconductivity of the former materials may be related to spatially
coherent low-frequency spin excitations that were previously thought
to be unique to the lower-Tc (<40 K) single-layer La2-xSrxCuO4 family.
@article{Mook1998,
abstract = {An important feature of the high-transition-temperature (high-Tc)
copper oxide superconductors is the magnetism that results from the
spins associated with the incomplete outer electronic shells (3d9)
of the copper ions. Fluctuations of these spins give rise to magnetic
excitations of the material, and might mediate the electron pairing
that leads to superconductivity. If the mechanism for high-Tc superconductivity
is the same for all copper oxide systems, their spin fluctuations
should be universal. But so far, theopposite has seemed to be the
case: neutron scattering data reveal clear differences between the
spin fluctuations for two major classes of high-Tc materials, La2-xSrxCuO4
(refs 1-3) and YBa2Cu3O7-x (refs 4-6), whose respective building
blocks are CuO2 layers and bilayers. Here we report two-dimensional
neutron-scattering imaging of YBa2Cu3O6.6, which reveals that the
low-frequency magnetic excitations are virtually identical to those
of similarly doped La2-xSrxCuO4. Thus, the high-temperature (Tc 92
K) superconductivity of the former materials may be related to spatially
coherent low-frequency spin excitations that were previously thought
to be unique to the lower-Tc (<40 K) single-layer La2-xSrxCuO4 family.},
added-at = {2010-11-06T00:14:39.000+0100},
author = {Mook, H. A. and Dai, Pengcheng and Hayden, S. M. and Aeppli, G. and Perring, T. G. and Dogan, F.},
biburl = {https://www.bibsonomy.org/bibtex/27d9dc177023e0fcbfe1bd3618e0874d0/nplumb},
comment = {10.1038/26931},
file = {:C\:\\Users\\Nick\\Documents\\Papers\\Mook et al. - Spin fluctuations in YBCO.pdf:PDF},
interhash = {5f8d3be046aba731590c163e0e69898b},
intrahash = {7d9dc177023e0fcbfe1bd3618e0874d0},
issn = {0028-0836},
journal = {Nature},
keywords = {imported},
month = oct,
number = 6702,
owner = {Nick},
pages = {580--582},
timestamp = {2010-11-06T00:14:43.000+0100},
title = {Spin fluctuations in YBa$_2$Cu$_3$O$_{6.6}$},
url = {http://dx.doi.org/10.1038/26931},
volume = 395,
year = 1998
}