Low-Energy Excitations of Charge Density Wave Metastable States in TaS ₃

Abstract

We have measured the specific heat of orthorhombic TaS3 between 0.08 K and 8 K. An extra-phononic contribution is shown to follow a Cp ∝ T0.32 law below 2 K. We ascribed this excess contribution to low-energy excitations between charge density wave metastable states.