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Nearly Singular Magnetic Fluctuations in the Normal State of a High-T_c Cuprate Superconductor

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arxiv cond-mat/9801169 v1 pith:34UZ3GZW submitted 1998-01-16 cond-mat.str-el cond-mat.supr-con

G. Aeppli (NEC Research) , T.E. Mason (University of Toronto) , S.M. Hayden (University of Bristol) , H.A. Mook (Oak Ridge National Laboratory) , J. Kulda (Institut Laue Langevin) This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords fluctuationsenergymagneticnearlynormalsingularstateadded
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fractionalized Fermi liquids and the cuprate phase diagram

    cond-mat.str-el 2025-08 unverdicted novelty 3.0 of 10

    Reviews the FL* theory for cuprates using ancilla layer models and SU(2) gauge theories to explain pseudogap hole pockets of area p/8, Fermi arcs, and transitions to d-wave superconductivity and Fermi liquid behavior.

  2. The foot, the fan, and the cuprate phase diagram: Fermi-volume-changing quantum phase transitions

    cond-mat.str-el 2025-01 conditional novelty 3.0 of 10

    The paper attributes the cuprate 'foot' to a disordered spin-density-wave transition and the 'fan' to a disorder-tuned FL-to-FL* Fermi-volume-changing transition described by a two-dimensional Yukawa-SYK model.

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