Research / 2020 / Article / Fig 5

Research Article

Manipulation of Band Degeneracy and Lattice Strain for Extraordinary PbTe Thermoelectrics

Figure 5

Low-magnification STEM images for Na0.03Eu0.03Mn0.03Pb0.91Te (a) and Na0.05Eu0.03Mn0.03Pb0.89Te (b), showing dense dislocations and a few nanoprecipitates (white spots). High-magnification STEM image (c) and the corresponding strain mappings (d) for Na0.03Eu0.03Mn0.03Pb0.91Te. Both samples are annealed at 900 K for 48 hours to reach the dislocation equilibrium.