Homologous series of layered tetradymite-like compounds in Bi-Te and GeTe-Bi2Te3 systems

Boundaries of the homologous phases in Sb–Te and Bi–Te binary alloy systems

“…However, Sb 20 Te 3 is present at a Te concentration of 13.0 at.%, which means that the range of the homologous phase has spread by 3.5% toward the Sb-rich side. In the case of the Bi-Te system, although the Bi 7 Te 3 (30.0 at.% Te) phase has been considered to the Bi-rich boundary [3,7], it was found that the homologous Bi 8 Te 3 (27.3 at.% Te) phase is the boundary of the X phase on the Bi-rich side.…”

“…In the Bi-Te binary system, which is a same V-VI system, the intermetallic compound Bi 2 Te 3 exists at 60 at.% Te. Shelimova et al [7] and Bos et al [3] reported the presence of seven compounds, all of which are homologous structures based on the A7 structure of the Bi phase and the structure of the Bi 2 Te 3 phase. The relation between this system and the Sb-Te system seems to be interesting.…”

Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys

“…Here we investigate Sb 2+ x Te 3 alloys grown epitaxially by MBE on silicon substrate. Several antimony telluride lamellar phases exist in the homologous series (Sb 2 Te 3 ) m (Sb 2 ) n , in which Sb 2 double layers (DLs) are inserted between Sb 2 Te 3 QLs forming ordered stacking sequences (also named adaptive natural SLs) . While the composition related increase of the lattice parameter is well known and used in ref.…”

Observation of a highly spin-polarized topological surface state in GeBi2Te4

“…12 A homologous series of pseudobinary compounds, nGeTemBi 2 Te 3 , was intensively studied in terms of its thermoelectric, galvanomagnetic, and thermomagnetic properties. [27][28][29][30] Among them, GeBi 2 Te 4 was theoretically proposed as a member of the 3D TIs. [31][32][33] It was experimentally verified to be a 3D TI possessing a single TSS by an angleresolved photoemission spectroscopy (ARPES) experiment.…”