Temperature and frequency dependence of the nuclear relaxation rate in Qn(TCNQ)2 |
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Authors: | E Ehrenfreund AJ Heeger |
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Institution: | Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA 19104, U.S.A. |
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Abstract: | The magnitude, frequency dependence and temperature dependence of the proton relaxation rates in Qn(TCNQ)2 are explained in terms of a theory which treats the short wavelength response as coherent and one-dimensional, while the long wavelength response is dominated by anisotropic (intrachain vs interchain) diffusion. The diffusive character of the response near q = 0 is consistent with recent attempts to understand the electronic properties of Qn(TCNQ)2 in terms of weak localization of states in one-dimension. Analysis of the data leads to the conclusion that the effective screened Coulomb interaction is relatively weak. |
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