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Fractional-power law susceptibility and specific heat of o-TaS3

We report on the power-law dependence on temperature of the magnetic susceptibility and the specific heat of the CDW (charge density wave) system o-TaS3. All the evidences are in favor of a typical REHAC (random exchange Heisenberg antiferromagnetic chain) behaviour [1], however in the diluted limit of spins s=1/2. We propose a consistent microscopic explanation of the corresponding elementary excitations within a new state formed below the glass transition demonstrated recently in this system [2].

charge density wave; magnetic and thermal properties; random spin chains

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