图4. 样品(AgBiSe2)0.75(SnTe)0.25沿(a)$[\bar{1}11]$和(b)[001]方向的HRTEM照片以及对应的(c, d)FFT图像
Fig. 4. Series HRTEM images along (a) $[\bar{1}11]$and (b) [001] zone axes for (AgBiSe2)0.75(SnTe)0.25 and (c, d) corresponding FFT images