New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts
The syntheses, structures, selected physical properties, and band electronic structures of three copper (I) dicyanamide halide salts of bis(ethylenedithio)tetrathiafulvalene ({kappa}-(ET){sub 2}Cu(N(CN){sub 2})X, where X = Cl, Br, and I) are discussed. X-ray crystallographic studies demonstrate that...
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Sandia National Laboratories
1990
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ftunivnotexas:info:ark/67531/metadc1194262 2023-05-15T15:52:57+02:00 New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts Wang, H. H. Carlson, K. D. Geiser, U. Kini, A. M. Schultz, A. J. Williams, J. M. Montgomery, L. K. Kwok, W. K. Welp, U. Vandervoort, K. G. Boryschuk, S. J. Strieby Crouch, A. V. Kommers, J. M. Watkins, D. M. Schirber, J. E. Overmyer, D. L. Jung, D. Novoa, J. J. Whangbo, M. H. United States. Department of Energy. Office of Energy Research. 1990 8 pages Text https://digital.library.unt.edu/ark:/67531/metadc1194262/ English eng Sandia National Laboratories other: DE91000029 rep-no: SAND-90-2470C rep-no: CONF-9009257--1 grantno: AC04-76DP00789 grantno: FG05-86ER45259 grantno: W-31109-ENG-38 osti: 6549234 https://digital.library.unt.edu/ark:/67531/metadc1194262/ ark: ark:/67531/metadc1194262 International conference on science and technology of synthetic metals, Tuebingen (Germany, F.R.), 2-7 Sep 1990 Electronic Structure Organic Compounds Superconductivity Carbonic Acid Derivatives 75 Condensed Matter Physics Superconductivity And Superfluidity Synthesis 36 Materials Science Organic Nitrogen Compounds Cyanamides Halogen Compounds Superconductors 360601 -- Other Materials-- Preparation & Manufacture Physical Properties Transition Element Compounds 360603* -- Materials-- Properties 656100 -- Condensed Matter Physics-- Superconductivity Halides Copper Compounds Salts Electric Conductivity Electrical Properties Article 1990 ftunivnotexas 2021-07-03T22:08:04Z The syntheses, structures, selected physical properties, and band electronic structures of three copper (I) dicyanamide halide salts of bis(ethylenedithio)tetrathiafulvalene ({kappa}-(ET){sub 2}Cu(N(CN){sub 2})X, where X = Cl, Br, and I) are discussed. X-ray crystallographic studies demonstrate that the three derivatives are isostructural. The bromide salt is an ambient pressure superconductor with an inductive onset at 11.6 K and a resistive onset at 12.5 K. {kappa}-(ET){sub 2}Cu(N(CN){sub 2})Cl exhibits the highest reported superconducting transition temperature ({Tc} = 12.8 K, 0.3 kbar) for an organic superconductor, once a semiconductor-semiconductor transition (42 K) is suppressed. The application of GE varnish or Apiezon N grease to crystals of {kappa}-(ET){sub 2}Cu(N(CN){sub 2})Cl provides sufficient stress to induce superconductivity at ambient pressure.'' Crystals of the iodide remain metallic to {approximately}150 K, where they become weakly semiconductive. No sign of superconductivity was detected at pressures (hydrostatic and shearing) up to 5.2 kbar and at temperatures as low as 1.1 K. The band electronic structures of the three salts are essentially identical. The differences in superconducting properties are explained in terms of differences in lattice softness, which are strongly influenced by short C-H{hor ellipsis}donor and C-H{hor ellipsis}anion contacts. 17 refs., 2 figs. Article in Journal/Newspaper Carbonic acid University of North Texas: UNT Digital Library |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Electronic Structure Organic Compounds Superconductivity Carbonic Acid Derivatives 75 Condensed Matter Physics Superconductivity And Superfluidity Synthesis 36 Materials Science Organic Nitrogen Compounds Cyanamides Halogen Compounds Superconductors 360601 -- Other Materials-- Preparation & Manufacture Physical Properties Transition Element Compounds 360603* -- Materials-- Properties 656100 -- Condensed Matter Physics-- Superconductivity Halides Copper Compounds Salts Electric Conductivity Electrical Properties |
spellingShingle |
Electronic Structure Organic Compounds Superconductivity Carbonic Acid Derivatives 75 Condensed Matter Physics Superconductivity And Superfluidity Synthesis 36 Materials Science Organic Nitrogen Compounds Cyanamides Halogen Compounds Superconductors 360601 -- Other Materials-- Preparation & Manufacture Physical Properties Transition Element Compounds 360603* -- Materials-- Properties 656100 -- Condensed Matter Physics-- Superconductivity Halides Copper Compounds Salts Electric Conductivity Electrical Properties Wang, H. H. Carlson, K. D. Geiser, U. Kini, A. M. Schultz, A. J. Williams, J. M. Montgomery, L. K. Kwok, W. K. Welp, U. Vandervoort, K. G. Boryschuk, S. J. Strieby Crouch, A. V. Kommers, J. M. Watkins, D. M. Schirber, J. E. Overmyer, D. L. Jung, D. Novoa, J. J. Whangbo, M. H. New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
topic_facet |
Electronic Structure Organic Compounds Superconductivity Carbonic Acid Derivatives 75 Condensed Matter Physics Superconductivity And Superfluidity Synthesis 36 Materials Science Organic Nitrogen Compounds Cyanamides Halogen Compounds Superconductors 360601 -- Other Materials-- Preparation & Manufacture Physical Properties Transition Element Compounds 360603* -- Materials-- Properties 656100 -- Condensed Matter Physics-- Superconductivity Halides Copper Compounds Salts Electric Conductivity Electrical Properties |
description |
The syntheses, structures, selected physical properties, and band electronic structures of three copper (I) dicyanamide halide salts of bis(ethylenedithio)tetrathiafulvalene ({kappa}-(ET){sub 2}Cu(N(CN){sub 2})X, where X = Cl, Br, and I) are discussed. X-ray crystallographic studies demonstrate that the three derivatives are isostructural. The bromide salt is an ambient pressure superconductor with an inductive onset at 11.6 K and a resistive onset at 12.5 K. {kappa}-(ET){sub 2}Cu(N(CN){sub 2})Cl exhibits the highest reported superconducting transition temperature ({Tc} = 12.8 K, 0.3 kbar) for an organic superconductor, once a semiconductor-semiconductor transition (42 K) is suppressed. The application of GE varnish or Apiezon N grease to crystals of {kappa}-(ET){sub 2}Cu(N(CN){sub 2})Cl provides sufficient stress to induce superconductivity at ambient pressure.'' Crystals of the iodide remain metallic to {approximately}150 K, where they become weakly semiconductive. No sign of superconductivity was detected at pressures (hydrostatic and shearing) up to 5.2 kbar and at temperatures as low as 1.1 K. The band electronic structures of the three salts are essentially identical. The differences in superconducting properties are explained in terms of differences in lattice softness, which are strongly influenced by short C-H{hor ellipsis}donor and C-H{hor ellipsis}anion contacts. 17 refs., 2 figs. |
author2 |
United States. Department of Energy. Office of Energy Research. |
format |
Article in Journal/Newspaper |
author |
Wang, H. H. Carlson, K. D. Geiser, U. Kini, A. M. Schultz, A. J. Williams, J. M. Montgomery, L. K. Kwok, W. K. Welp, U. Vandervoort, K. G. Boryschuk, S. J. Strieby Crouch, A. V. Kommers, J. M. Watkins, D. M. Schirber, J. E. Overmyer, D. L. Jung, D. Novoa, J. J. Whangbo, M. H. |
author_facet |
Wang, H. H. Carlson, K. D. Geiser, U. Kini, A. M. Schultz, A. J. Williams, J. M. Montgomery, L. K. Kwok, W. K. Welp, U. Vandervoort, K. G. Boryschuk, S. J. Strieby Crouch, A. V. Kommers, J. M. Watkins, D. M. Schirber, J. E. Overmyer, D. L. Jung, D. Novoa, J. J. Whangbo, M. H. |
author_sort |
Wang, H. H. |
title |
New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
title_short |
New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
title_full |
New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
title_fullStr |
New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
title_full_unstemmed |
New k-phase materials, k-(ET) sub 2 Cu(N(CN) sub 2 )X: X = Cl, Br and I: The synthesis, structure and superconductivity above 11 K in the Cl ( Tc = 12. 8 K, 0. 3 kbar) and Br( Tc = 11. 6 K) salts |
title_sort |
new k-phase materials, k-(et) sub 2 cu(n(cn) sub 2 )x: x = cl, br and i: the synthesis, structure and superconductivity above 11 k in the cl ( tc = 12. 8 k, 0. 3 kbar) and br( tc = 11. 6 k) salts |
publisher |
Sandia National Laboratories |
publishDate |
1990 |
url |
https://digital.library.unt.edu/ark:/67531/metadc1194262/ |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
International conference on science and technology of synthetic metals, Tuebingen (Germany, F.R.), 2-7 Sep 1990 |
op_relation |
other: DE91000029 rep-no: SAND-90-2470C rep-no: CONF-9009257--1 grantno: AC04-76DP00789 grantno: FG05-86ER45259 grantno: W-31109-ENG-38 osti: 6549234 https://digital.library.unt.edu/ark:/67531/metadc1194262/ ark: ark:/67531/metadc1194262 |
_version_ |
1766388032954433536 |