Link between spin fluctuations and electron pairing in copper oxide superconductors

K. Jin, N. P. Butch, K. Kirshenbaum, J. Paglione and R. L. Greene ()
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K. Jin: Center for Nanophysics & Advanced Materials, University of Maryland, College Park, Maryland 20742, USA
N. P. Butch: Center for Nanophysics & Advanced Materials, University of Maryland, College Park, Maryland 20742, USA
K. Kirshenbaum: Center for Nanophysics & Advanced Materials, University of Maryland, College Park, Maryland 20742, USA
J. Paglione: Center for Nanophysics & Advanced Materials, University of Maryland, College Park, Maryland 20742, USA
R. L. Greene: Center for Nanophysics & Advanced Materials, University of Maryland, College Park, Maryland 20742, USA

Nature, 2011, vol. 476, issue 7358, 73-75

Abstract: Spin fluctuation scattering in organic superconductors The relative importance of phenomena such as spin and charge (stripe) order and a pseudogap phase are still a matter of great debate with regard to the high-transition-temperature copper oxides. In electron-doped materials, the absence of a pseudogap phase in the underdoped region of the phase diagram and weaker electron correlations suggest that antiferromagnetic spin fluctuations are the dominant feature. Jin et al. report a study of magnetotransport in thin films of the electron-doped copper oxide La2 − xCexCuO4 (LCCO). They show that a linear-temperature (T-linear) scattering rate is correlated with the electron pairing. Comparison with similar behaviour found in organic superconductors strongly suggests that the T-linear resistivity is caused by spin-fluctuation scattering.

Date: 2011
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DOI: 10.1038/nature10308

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