Low-frequency spin fluctuations in the superconducting La{sub 2-x}Sr{sub x}CuO{sub 4}

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Recent progress in low-energy neutron scattering study on the spatially modulated or so-called incommensurate spin fluctuations is reviewed. Well-defined incommensurate spin fluctuations are observed beyond x approx 0.05 and up to the highest Sr-concentration x approx. 0.25 in the present study. The incommensurability delta(x) is saturated at around 1/8 in the overdoped region and linearly scaled with the upper limit of Tc(x) between the underdoped and optimally doped region. A characteristic energy E* below which the dynamical magnetic susceptibility dramatically diminishes in the superconducting state can be determined to be around 7 meV in the energy spectrum of the spin ... continued below

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6 p.

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Yamada, K.; Lee, C.H.; Endoh, Y.; Shirane, G.; Birgeneau, R.J. & Kastner, M.A. February 1, 1997.

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Recent progress in low-energy neutron scattering study on the spatially modulated or so-called incommensurate spin fluctuations is reviewed. Well-defined incommensurate spin fluctuations are observed beyond x approx 0.05 and up to the highest Sr-concentration x approx. 0.25 in the present study. The incommensurability delta(x) is saturated at around 1/8 in the overdoped region and linearly scaled with the upper limit of Tc(x) between the underdoped and optimally doped region. A characteristic energy E* below which the dynamical magnetic susceptibility dramatically diminishes in the superconducting state can be determined to be around 7 meV in the energy spectrum of the spin fluctuations for x=0.15 and x=0.18 crystals. The disorder effect induces a low-frequency component of the incommensurate spin fluctuations below E*.

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6 p.

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INIS; OSTI as DE97008937

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  • International conference on materials and mechanisms of superconductivity: high temperature superconductors, Beijing (China), 28 Feb - 4 Mar 1997

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  • Other: DE97008937
  • Report No.: BNL--64556
  • Report No.: CONF-970235--
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 628793
  • Archival Resource Key: ark:/67531/metadc690516

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  • February 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 10, 2015, 1:41 p.m.

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Yamada, K.; Lee, C.H.; Endoh, Y.; Shirane, G.; Birgeneau, R.J. & Kastner, M.A. Low-frequency spin fluctuations in the superconducting La{sub 2-x}Sr{sub x}CuO{sub 4}, article, February 1, 1997; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc690516/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.