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Nearly Singular Magnetic Fluctuations in the Normal State of a High-T_c Cuprate Superconductor | | G. Aeppli
; T.E. Mason
; S.M. Hayden
; H.A. Mook
; J. Kulda
; | | Date: |
16 Dec 1997 | | Journal: | Science, Vol 278, 21 November 1997, 1432-1435 | | Subject: | Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con | | Affiliation: | NEC Research), T.E. Mason (University of Toronto), S.M. Hayden (University of Bristol), H.A. Mook (Oak Ridge National Laboratory), and J. Kulda (Institut Laue Langevin | | Abstract: | Polarized and unpolarized neutron scattering was used to measure the wave vector- and frequency-dependent magnetic fluctuations in the normal state (from the superconducting transition temperature, T_c=35, up to 350 K) of single crystals of La_{1.86}Sr_{0.14}CuO_4. The peaks which dominate the fluctuations have amplitudes that decrease as T^{-2} and widths that increase in proportion to the thermal energy, k_B T (where k_B is Boltzmann’s constant), and energy transfer added in quadrature. The nearly singular fluctuations are consistent with a nearby quantum critical point. | | Source: | arXiv, cond-mat/9801169 | | Services: | Forum | Review | PDF | Favorites | |
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