Recent neutron scattering results on high-temperature superconductors

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Triple-axis spectrometry has been used to determine the magnetic excitations in YBa{sub 2}Cu{sub 3}O{sub 7}. Polarized measurements at 100 K show the scattering consists of a peak near 40 meV superposed on a small relatively flat background. The 40-meV peak is found to be sharp in energy and anisotropic in momentum occupying a square portion of the Cu-O reciprocal lattice plane. The temperature dependence of the scattering is identical at the square side and corner. Polarized measurements show that the small background scattering observed at 100 K disappears below the superconducting transition. Resonant absorption measurements made to examine the Cu ... continued below

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29 p.

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Mook, H.A.; Dai, P.; Aeppli, G.; Mason, T.E.; Hecker, N.E.; Harvey, J.A. et al. September 16, 1994.

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Description

Triple-axis spectrometry has been used to determine the magnetic excitations in YBa{sub 2}Cu{sub 3}O{sub 7}. Polarized measurements at 100 K show the scattering consists of a peak near 40 meV superposed on a small relatively flat background. The 40-meV peak is found to be sharp in energy and anisotropic in momentum occupying a square portion of the Cu-O reciprocal lattice plane. The temperature dependence of the scattering is identical at the square side and corner. Polarized measurements show that the small background scattering observed at 100 K disappears below the superconducting transition. Resonant absorption measurements made to examine the Cu phonons show that no changes in the phonons occur at the superconducting transition.

Physical Description

29 p.

Notes

INIS; OSTI as DE95007028

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  • 41. Yamada conference on neutron scattering, Sendai (Japan), 11-14 Oct 1994

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  • Other: DE95007028
  • Report No.: CONF-9410165--11
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/28352 | External Link
  • Office of Scientific & Technical Information Report Number: 28352
  • Archival Resource Key: ark:/67531/metadc666346

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  • September 16, 1994

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 20, 2016, 4:17 p.m.

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Mook, H.A.; Dai, P.; Aeppli, G.; Mason, T.E.; Hecker, N.E.; Harvey, J.A. et al. Recent neutron scattering results on high-temperature superconductors, report, September 16, 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc666346/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.