The Transport Properties of Quasi-One-Dimensional Ba3Co2O6(CO3)(0.7)

We have performed combined elastic neutron diffuse, electrical transport, specific heat, and thermal conductivity measurements on the quasi-one-dimensional Ba3Co2O6(CO3)(0.7) single crystal to characterize its transport properties. A modulated superstructure of polyatomic CO32- is formed, which not only interferes the electronic properties of this compound, but also reduces the thermal conductivity along the c-axis. Furthermore, a large magnetic entropy is observed to be contributed to the heat conduction. Our investigations reveal the influence of both structural and magnetic effects on its transport properties and suggest a theoretical improvement on the thermoelectric materials by building up superlattice with conducting ionic group.