We report on the molecular beam epitaxy and properties of a magnetic topological insulator (TI): Cr-doped Sb2Te3. Composition analysis reveals that Cr replaces Sb, and X-ray diffraction confirms that a single-phase textured crystal structure can be obtained for (CrxSb1-x)2Te3 with x up to 0.44. A further increase in x results in phase separation or precipitates in the material. The Curie temperature TC increases with x up to 0.44 and reaches 250 K, which is the highest TC observed thus far in magnetically doped TIs.
ASJC Scopus subject areas
- Physics and Astronomy(all)