Journal ArticleDOI
Determination of the π-charge distribution of the DMe-DCNQI molecule in (DMe-DCNQI)2M, M=Li, Ag, and Cu
Kenji Mizoguchi,Yukie Shinohara,S. Kazama,Maki Hiraoka,Maki Hiraoka,Hirokazu Sakamoto,Reizo Kato,Ko-ichi Hiraki,Toshihiro Takahashi +8 more
TLDR
In this article, the spin/charge distribution in a DMe-DCNQI molecule of the Li-salt from the Knight shifts at each atom on the molecule was determined.Abstract:
Solid state high-resolution NMR of 1H and 13C along with 15N is analyzed to investigate the electronic states of the charge transfer salts (DMe-DCNQI)2M, (M=Li, Ag, and Cu). We determined the spin/charge distribution in a DMe-DCNQI molecule of the Li-salt from the Knight shifts at each atom on the molecule. It is found that the obtained charge distribution is similar to the theoretical prediction. The charge density on the DCNQI molecules of the Ag-salt is found to be smaller by 20% than the Li-salt, which could be an origin of differences from the Li-salt. This result is consistent with the first principle calculations (Miyazaki and Terakura, Phys. Rev. B 54, 10452, 1996).read more
Citations
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From charge- and spin-ordering to superconductivity in the organic charge-transfer solids
R. T. Clay,Sumit Mazumdar +1 more
TL;DR: In this article, it was shown that the spin-singlet in the quarter-filled band is necessarily charge-disproportionated, with charge-rich pairs of nearest neighbor sites separated by charge-poor pairs of sites in the insulating state.
Journal ArticleDOI
From charge- and spin-ordering to superconductivity in the organic charge-transfer solids
R. T. Clay,Sumit Mazumdar +1 more
TL;DR: In this paper, the authors present a valence-bond theory of superconductivity in charge-transfer solids, in which the superconducting state is reached by the destabilization of the PEC by additional pressure-induced lattice frustration that makes the spin-singlets mobile.
References
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Journal ArticleDOI
Electron Spin Paramagnetism of Lithium and Sodium
TL;DR: In this paper, the Langevin-Debye formula was used to measure the paramagnetic susceptibility of conduction electron spin resonances in terms of the nuclear static susceptibility of metal nuclei in the same sample and at the same frequency, the resonance being observed merely by changing the static magnetic field.
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Conductive Copper Salts of 2,5-Disubstituted N,N′-Dicyanobenzoquinonediimines (DCNQIs): Structural and Physical Properties
TL;DR: In this paper, structural and physical properties of the Cu salts of a series of π-acceptors N,N′-dicyanobenzoquinonediimines (DCNQIs) are described.
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First-principles theoretical study of metallic states of DCNQI-(Cu,Ag) systems: Simplicity and variety in complex systems.
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X-ray scattering evidence for dimerization (4 kF) and spin-Peierls distortion (2 kF) in silver salts of dicyanoquinodiimine (2,5 MR-DCNQI )2 Ag (R = CH3, Cl or Br, M = CH3)
TL;DR: In this article, structural instabilities of 2,5(MR-DCNQI) 2 Ag (R=CH 3, Cl or Br, M=CH3 ) using low-temperature X-ray diffuse scattering and diffraction techniques were studied.