X-ray search for CDW in single crystal YBa{sub 2}CU{sub 3}O{sub 7-{delta}}

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Recently, H.L. Edwards et al. observed, in STM experiments at 20K, modulations in the CuO chain layer of cold-cleaved single crystals of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} which they interpreted as a possible charge density wave (CDW). Since X-ray scattering is an ideal tool for the study of static or dynamic lattice displacements, we performed a synchrotron X-ray study at beamline X14 at the NSLS of BNL on a high quality single crystal of YBa{sub 2}Cu{sub 3}O{sub 7- {delta}}, which was mainly single domain with a spacially well localized volume fraction of other twin orientations of roughly 10%. Appropriate scattering configurations ... continued below

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4 p.

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Wochner, P.; Isaacs, E.; Moss, S.C.; Zschack, P.; Giapintzakis, J. & Ginsberg, D.M. June 1, 1996.

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Recently, H.L. Edwards et al. observed, in STM experiments at 20K, modulations in the CuO chain layer of cold-cleaved single crystals of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} which they interpreted as a possible charge density wave (CDW). Since X-ray scattering is an ideal tool for the study of static or dynamic lattice displacements, we performed a synchrotron X-ray study at beamline X14 at the NSLS of BNL on a high quality single crystal of YBa{sub 2}Cu{sub 3}O{sub 7- {delta}}, which was mainly single domain with a spacially well localized volume fraction of other twin orientations of roughly 10%. Appropriate scattering configurations were chosen to enable observations of longitudinal or transverse CDWs with polarization either in the chain direction, {parallel} <001> or {perpendicular} to it in <001>. The X-ray energy of 16keV allowed us to reach large momentum transfers to increase the sensitivity to lattice displacements. In none of our scans, which definitely covered the case of a 1-dimensional longitudinal CDW with propagation in the b direction as proposed by Edwards et al., did we find intensity other than the main Bragg peak(s) and the twin reflections. We therefore suspect that the STM finding may be a surface-induced phenomenon.

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4 p.

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INIS; OSTI as DE96010688

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  • 10. anniversary high temperature superconductivity workshop on physics, materials and applications, Houston, TX (United States), 12-16 Mar 1996

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  • Other: DE96010688
  • Report No.: BNL--63039
  • Report No.: CONF-960366--11
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 242694
  • Archival Resource Key: ark:/67531/metadc673420

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  • June 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Aug. 23, 2016, 3:26 p.m.

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Wochner, P.; Isaacs, E.; Moss, S.C.; Zschack, P.; Giapintzakis, J. & Ginsberg, D.M. X-ray search for CDW in single crystal YBa{sub 2}CU{sub 3}O{sub 7-{delta}}, article, June 1, 1996; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc673420/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.