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Lee, Kap Ho,Dharmaiah, Peyala,Hong, Soon-Jik Elsevier 2019 Scripta materialia Vol.162 No.-
<P><B>Abstract</B></P> <P>The formation mechanism of twin structures in <I>p-type</I> (Bi<SUB>0.25</SUB>Sb<SUB>0.75</SUB>)<SUB>2</SUB>Te<SUB>3</SUB> compound was examined using high-resolution transmission electron microscopy (HR-TEM) and computer simulations. The results shown that the formation of twins is analogous to the twinning mechanism via synchronized activation of Shockley partial dislocations commonly observed terminating {111} growth and annealing twins in face centered cubic (FCC) metals. The 10 1 ¯ 0 boundary, as an incoherent twin boundary (ITB), is mobile due to its lower shear stress compared to that of the coherent {0001} twin boundary; thickness of the twin region can be reduced or increased according to the direction of the movement.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>