Elastic properties of one dimensional compounds |
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Authors: | M Barmatz LR Testardi AF Garito AJ Heeger |
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Institution: | Bell Laboratories, Murray Hill, New Jersey 07974, USA;Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19174, U.S.A. |
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Abstract: | We have investigated the elastic properties of several one-dimensional compounds using a vibrating reed technique. A model calculation shows that a vanishing Young's modulus will occur for elastic one-dimensionality. TTF-TCNQ exhibits a small modulus which decreases with increasing temperature extrapolating to zero at T ≈ 500–700K. The uniaxial stress dependence of the metal-insulator transition temperature is calculated to be . KCP shows a much higher modulus and a phase transformation at ~ 35 K. |
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