On the ``inverse'' isotope effect in organic superconductors: New findings and implications

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The inverse deuterium isotope effect, previously found in K-(BEDT-TTF){sub 2}CU(NCS){sub 2}, is also found in two other BEDT-TTF-based superconductors with different packing motifs and different types of anions. Remarkably, the magnitude of the isotope shift is essentially identical in all three superconductors, ca. +0.26 {+-} 0.06 K. These results, when taken together with the recent results of Lang et al. on the uniaxial pressure derivatives of T{sub c}, suggest that the inverse isotope effect may not have a direct relationship to the pairing mechanism but instead is a reflection of the change in the internal lattice pressure.

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3 p.

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Kini, A. M.; Schlueter, J. A.; Ward, B. H.; Geiser, U. W. & Wang, H. H. July 24, 2000.

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The inverse deuterium isotope effect, previously found in K-(BEDT-TTF){sub 2}CU(NCS){sub 2}, is also found in two other BEDT-TTF-based superconductors with different packing motifs and different types of anions. Remarkably, the magnitude of the isotope shift is essentially identical in all three superconductors, ca. +0.26 {+-} 0.06 K. These results, when taken together with the recent results of Lang et al. on the uniaxial pressure derivatives of T{sub c}, suggest that the inverse isotope effect may not have a direct relationship to the pairing mechanism but instead is a reflection of the change in the internal lattice pressure.

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3 p.

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INIS; OSTI as DE00759056

Medium: P; Size: 3 pages

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  • International Conference on the Science and Technology of Synthetic Metals (ICSM 2000), Badgastein (AT), 07/15/2000--07/21/2000

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  • Report No.: ANL/CHM/CP-101213
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 759056
  • Archival Resource Key: ark:/67531/metadc708354

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Office of Scientific & Technical Information Technical Reports

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  • July 24, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 7:36 p.m.

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Kini, A. M.; Schlueter, J. A.; Ward, B. H.; Geiser, U. W. & Wang, H. H. On the ``inverse'' isotope effect in organic superconductors: New findings and implications, article, July 24, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc708354/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.