13C NMR Study of Layered Organic Superconductors Based on BEDT-TTF Molecules.
作者： A. Kawamoto , K. Miyagawa , Y. Nakazawa , K. Kanoda
DOI: 10.1103/PHYSREVLETT.74.3455
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摘要: The normal state of the layered organic superconductors $\ensuremath{\kappa}\ensuremath{-}(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{TF}{)}_{2}X$ ( $X\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\mathrm{Cu}(\mathrm{NCS}{)}_{2}$ and Cu[N(CN${)}_{2}$]Br) has been studied by ${}^{13}$C NMR for first time. nuclear spin-lattice relaxation rate, ${T}_{1}^{\ensuremath{-}1}$, is greatly enhanced over value expected from Korringa relation shows an anomalous peak around 50 K both compounds. This experimental evidence strong antiferromagnetic spin fluctuations in these materials. depression observed below coincides with appearance Fermi liquid behavior charge transport.
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sci-hub.se 参考文章(17)
Jack M. Williams, Aravinda M. Kini, Hau H. Wang, K. Douglas Carlson, Urs Geiser, Lawrence K. Montgomery, Gloria J. Pyrka, Diana M. Watkins, Jefferson M. Kommers, From semiconductor-semiconductor transition (42 K) to the highest-Tc organic superconductor, κ-(ET)2Cu[N(CN)2]Cl (Tc = 12.5 K) Inorganic Chemistry. ,vol. 29, pp. 3272- 3274 ,(1990) , 10.1021/IC00343A003
J. E. Schirber, D. L. Overmyer, K. D. Carlson, J. M. Williams, A. M. Kini, H. Hau Wang, H. A. Charlier, B. J. Love, D. M. Watkins, G. A. Yaconi, Pressure-temperature phase diagram, inverse isotope effect, and superconductivity in excess of 13 K in κ-(BEDT-TTF)2Cu[N(CN)2]Cl, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene Physical Review B. ,vol. 44, pp. 4666- 4669 ,(1991) , 10.1103/PHYSREVB.44.4666
Hatsumi Urayama, Hideki Yamochi, Gunzi Saito, Kiyokazu Nozawa, Tadashi Sugano, Minoru Kinoshita, Shoichi Sato, Kokichi Oshima, Atsushi Kawamoto, Jiro Tanaka, A New Ambient Pressure Organic Superconductor Based on BEDT-TTF with TCHigher than 10 K (TC=10.4 K) Chemistry Letters. ,vol. 17, pp. 55- 58 ,(1988) , 10.1246/CL.1988.55
Aravinda M Kini, Urs Geiser, Hau H Wang, K Douglas Carlson, Jack M Williams, WK Kwok, KG Vandervoort, James E Thompson, Daniel L Stupka, None, A new ambient-pressure organic superconductor, .kappa.-(ET)2Cu[N(CN)2]Br, with the highest transition temperature yet observed (inductive onset Tc = 11.6 K, resistive onset = 12.5 K) Inorganic Chemistry. ,vol. 29, pp. 2555- 2557 ,(1990) , 10.1021/IC00339A004
K. Murata, M. Tokumoto, H. Anzai, Y. Honda, N. Kinoshita, T. Ishiguro, N. Toyota, T. Sasaki, Y. Muto, Superconductivity of BEDT-TTF salts: (I)Effect, of pressure and alloying and (II) Shubnikov de Haas effect Synthetic Metals. ,vol. 27, ,(1988) , 10.1016/0379-6779(88)90410-9
Keizo Murata, Masayoshi Ishibashi, Yoshiaki Honda, Nathanael A. Fortune, Madoka Tokumoto, Nobumori Kinoshita, Hiroyuki Anzai, Temperature dependence of hall effect in κ-(BEDT-TTF)2Cu(NCS)2 Solid State Communications. ,vol. 76, pp. 377- 381 ,(1990) , 10.1016/0038-1098(90)90858-9
T Takahashi, T Tokiwa, K Kanoda, H Urayama, H Yamochi, G Saito, NMR relaxation in the organic superconductor (BEDT-TTF)2Cu(NCS)2 Synthetic Metals. ,vol. 27, ,(1988) , 10.1016/0379-6779(88)90418-3
A.V. Skripov, A.P. Stepanov, Mechanisms of nuclear spin relaxation in (BEDT-TTF)-based organic superconductors Physica C-superconductivity and Its Applications. ,vol. 197, pp. 89- 94 ,(1992) , 10.1016/0921-4534(92)90240-D
S. M. De Soto, C. P. Slichter, H. H. Wang, U. Geiser, J. M. Williams, Evidence for the role of fluxoids in enhancing NMR spin-lattice relaxation and implications for intrinsic pinning of the flux lattice in organic superconductors. Physical Review Letters. ,vol. 70, pp. 2956- 2959 ,(1993) , 10.1103/PHYSREVLETT.70.2956
Jan Larsen, Christine Lenoir, Synthesis of Bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) Synthesis. ,vol. 1989, pp. 134- 134 ,(1989) , 10.1055/S-1989-27175