Nearly singular magnetic fluctuations in the normal state of a high-T{sub c} cuprate superconductor
- NEC Research Institute, Princeton, NJ (United States)
- Univ. of Bristol (United Kingdom)
- Oak Ridge National Lab., TN (United States); and others
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{sub c} = 35 kelvin, up to 350 kelvin) of single crystals of La{sub 1.86}Sr{sub 0.14}CuO{sub 4}. The peaks that dominate the fluctuations have amplitudes that decreases at T{sup -2} and widths that increase in proportion to the thermal energy, k{sub B}T (where k{sub B} is Boltzmann`s constant), and energy transfer added in quadrature. The nearly singular fluctuations are consistent with a nearby quantum critical point. 17 refs., 4 figs.
- OSTI ID:
- 569323
- Journal Information:
- Science, Vol. 278, Issue 5342; Other Information: PBD: 21 Nov 1997
- Country of Publication:
- United States
- Language:
- English
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