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Solitons in Polyacetylene: Magnetic Susceptibility

Satoshi IkehataLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104J. KauferLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104T WoernerLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104Adam ProńLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104Mark A. DruyLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104A. V. SivakLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104Alan J. HeegerLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104Alan G. MacDiarmidLaboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104

1980en

ABI

Annotatsiya

The absoulte spin susceptibility of As${\mathrm{F}}_{5}$-doped trans-polyacetylene, ${[\mathrm{CH}{(\mathrm{As}{\mathrm{F}}_{5})}_{y}]}_{x}$, was determined by spin resonance techniques for $0.0004<~y<~0.138$. The Curie-law contribution decreases above $y=0.001$ to a level less than 1 ppm in the highly conducting regime. The temperature-independent Pauli term is small (\ensuremath{\le}5\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}8}$ emu/mole) for $y<0.01$, remains small up to $y=0.05$, and shows an abrupt increase near $y=0.07$ to a value of \ensuremath{\sim} 3 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}6}$ emu/mole at higher concentrations. The results are consistent with the soliton doping mechanism.

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DOI: 10.1103/physrevlett.45.1123

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