STM investigation of the superconducting state of BSCCO 2212 and borocarbide materials

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We present spectroscopic Scanning Tunneling Microscope (STM) measurements performed at 4.2 K on BSCCO 2212 single crystals and Y, Lu and Er based borocarbide compounds. The conductance versus voltage spectra on BSCCO 2212 reveal a reproducible dip feature near e{vert_bar}V{vert_bar} = 2{Delta}, for both voltage polarities pointing to a strong coupling origin of the feature. The conductance spectra obtained on YNi{sub 2}B{sub 2}C thin films and LuNi{sub 2}B{sub 2}C single crystals are similar and correspond to a BCS ratio of 3.2 indicating weak coupling superconductivity in these compounds. On Er Ni{sub 2}B{sub 2}C single crystals, the conductance spectra show a ... continued below

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7 p.

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Iavarone, M.; Guptasarma, P. & Hinks, D.G. October 1, 1997.

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Description

We present spectroscopic Scanning Tunneling Microscope (STM) measurements performed at 4.2 K on BSCCO 2212 single crystals and Y, Lu and Er based borocarbide compounds. The conductance versus voltage spectra on BSCCO 2212 reveal a reproducible dip feature near e{vert_bar}V{vert_bar} = 2{Delta}, for both voltage polarities pointing to a strong coupling origin of the feature. The conductance spectra obtained on YNi{sub 2}B{sub 2}C thin films and LuNi{sub 2}B{sub 2}C single crystals are similar and correspond to a BCS ratio of 3.2 indicating weak coupling superconductivity in these compounds. On Er Ni{sub 2}B{sub 2}C single crystals, the conductance spectra show a pronounced broadening compared to the spectra obtained on LuNi{sub 2}B{sub 2}C and YNi{sub 2}B{sub 2}C, which is attributed to the pair-breaking effect due to the Er magnetic ions.

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7 p.

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OSTI as DE98000294

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  • Spectroscopies of novel superconductors conference, Falmouth, MA (United States), 14-18 Sep 1997

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  • Other: DE98000294
  • Report No.: ANL/MSD/CP--94368
  • Report No.: CONF-970959--
  • Grant Number: W-31109-ENG-38;W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 539887
  • Archival Resource Key: ark:/67531/metadc689547

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 24, 2016, 1:39 p.m.

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Iavarone, M.; Guptasarma, P. & Hinks, D.G. STM investigation of the superconducting state of BSCCO 2212 and borocarbide materials, article, October 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc689547/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.