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Despite an effective p-type dopant for PbTe, the low solubility of Na limits the fully optimization of thermoelectric properties of Na-doped PbTe. In this work, Na-doped PbTe was synthesized under high pressure. The formation of the desired rocksalt phase with substantially increased Na content leads to a high carrier concentration of 3.2×1020 cm−3 for Na0.03Pb0.97Te. Moreover, dense in-grain dislocations...
Carrier behavior of CaB6 powders was investigated by using in situ Hall effect measurement under high pressure and resistivity property was detected under low temperature with microcircuit fabricated on diamond anvil cell. Carrier behavior was analyzed by carrier concentration and Hall coefficient. The variation of defects in the grain boundary region lead the carrier concentration and the Hall coefficient...
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