In:
APL Materials, AIP Publishing, Vol. 4, No. 12 ( 2016-12-01)
Abstract:
We present a nanoscale structural and density functional study of the Mn doped 3D topological insulator Bi2Te3. X-ray absorption near edge structure shows that Mn has valency of nominally 2+. Extended x-ray absorption fine structure spectroscopy in combination with electron energy loss spectroscopy (EELS) shows that Mn is a substitutional dopant of Bi and Te and also resides in the van der Waals gap between the quintuple layers of Bi2Te3. Combination of aberration-corrected scanning transmission electron microscopy and EELS shows that Mn substitution of Te occurs in film regions with increased Mn concentration. First-principles calculations show that the Mn dopants favor octahedral sites and are ferromagnetically coupled.
Type of Medium:
Online Resource
ISSN:
2166-532X
Language:
English
Publisher:
AIP Publishing
Publication Date:
2016
detail.hit.zdb_id:
2722985-3