英语翻译As shown in Fig.9(a),for a control sample of p-type PbTe

英语翻译
As shown in Fig.9(a),for a control sample of p-type PbTe doped with 1% Na2Te,the carrier mobility at room temperature is x02350 cm2 Vx031 sx031.The corresponding carrier mobility for a sample containing
1% (and 2%) SrTe is x02340 cm2 Vx031 sx031 (for the same carrier concentration of x025.6 x04 1019 cmx033).The growth of
endotaxial SrTe nanocrystals in the PbTe matrix does not appear to affect the hole scattering.This is believed to occur by (1) endotaxial alignment of SrTe and PbTe with coherent/semicoherent
interfaces,and (2) the alignment of the energies of the valence bands in the two materials where the band offset is very small at >300 K.The favorable valence band top alignment of the PbTe and SrTe phases is also suggested by first-principles band calculations.As can be seen from Fig.9(b) the alignment
of the valence band top is favorable and indeed p-type Na doping in the PbTe–SrTe system does result in negligible reduction of the carrier mobility relative to pure PbTe.14