On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A$_{0.9}$Mo$_6$O$_{17}$ (A=Na, K)

We report a comparative study of the specific heat, electrical resistivity and thermal conductivity of the quasi-two-dimensional purple bronzes Na $_{0.9}$ Mo $_{6}$ O $_{17}$ and K $_{0.9}$ Mo $_{6}$ O $_{17}$ , with special emphasis on the behavior near their respective charge-density-wave transition temperatures $T_{P}$ . The contrasting behavior of both the transport and the thermodynamic properties near $T_{P}$ is argued to arise predominantly from the different levels of intrinsic disorder in the two systems. A significant proportion of the enhancement of the thermal conductivity above $T_{P}$ in Na $_{0.9}$ Mo $_{6}$ O $_{17}$ , and to a lesser extent in K $_{0.9}$ Mo $_{6}$ O $_{17}$ , is attributed to the emergence of phason excitations.

On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A $_{0.9}$ Mo $_{6}$ O $_{17}$ (A=Na, K)

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On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A $_{0.9}$ Mo $_{6}$ O $_{17}$ (A=Na, K)

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On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A0.90.9​Mo66​O1717​ (A=Na, K)

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On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A0.90.9​Mo66​O1717​ (A=Na, K)

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On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A $_{0.9}$ Mo $_{6}$ O $_{17}$ (A=Na, K)

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On the transport and thermodynamic properties of quasi-two-dimensional purple bronzes A $_{0.9}$ Mo $_{6}$ O $_{17}$ (A=Na, K)

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