Abstract:At very low temperatures, the tunneling theory for amorphous solids predicts a thermal conductivity κ ∝ T p , with p = 2. We have studied the effect of the Nuclear Quadrupole moment on the thermal conductivity of glasses at very low temperatures. We developed a theory that couples the tunneling motion to the nuclear quadrupoles moment in order to evaluate the thermal conductivity. Our result suggests a cross over between two different regimes at the temperature close to the nuclear quadrupoles energy. Below th… Show more
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