Antimony segregation in Si layers grown by molecular beam epitaxy on Si wafers with different crystallographic orientations
- Authors: Yurasov D.V.1,2, Drozdov M.N.1, Shmagin V.B.1, Novikov A.V.1,2
-
Affiliations:
- Institute for Physics of Microstructures
- Lobachevsky State University of Nizhny Novgorod
- Issue: Vol 51, No 12 (2017)
- Pages: 1552-1556
- Section: XXI International Symposium “Nanophysics and Nanoelectronics”, Nizhny Novgorod, March 13–16, 2017
- URL: https://journals.rcsi.science/1063-7826/article/view/201982
- DOI: https://doi.org/10.1134/S1063782617120211
- ID: 201982
Cite item
Abstract
The segregation of Sb in Si layers grown by molecular beam epitaxy on Si substrates with the (111), (110), and (115) crystallographic orientations is studied; the results obtained for these orientations are compared with those obtained for the most widely used orientation (001). It is found that there is a qualitative similarity between the temperature dependences of the Sb segregation ratio (r) for all studied orientations; in particular, it is possible to separate two characteristic temperature ranges corresponding to the kinetically limited and equilibrium regimes of segregation. However, quantitatively, the values of r for the orientations under study differ significantly from those for the Si(001) case at the same temperatures. For all orientations, narrow temperature ranges within which the values of r vary by nearly five orders of magnitude are revealed for all dependences of r on the growth temperature. This finding allows us to adopt the method of selective doping, which was for the first time suggested by us for structures grown on Si (001) and is based on the controlled use of the segregation effect, to structures grown on Si substrates with an orientation different from (001). Using this method, selectively doped Si:Sb/Si(111) structures are fabricated; in these structures, a variation in the Sb concentration by an order of magnitude occurs at the scale of several nanometers.
About the authors
D. V. Yurasov
Institute for Physics of Microstructures; Lobachevsky State University of Nizhny Novgorod
Author for correspondence.
Email: Inquisitor@ipmras.ru
Russian Federation, Nizhny Novgorod Region, 603087; Nizhny Novgorod, 603950
M. N. Drozdov
Institute for Physics of Microstructures
Email: Inquisitor@ipmras.ru
Russian Federation, Nizhny Novgorod Region, 603087
V. B. Shmagin
Institute for Physics of Microstructures
Email: Inquisitor@ipmras.ru
Russian Federation, Nizhny Novgorod Region, 603087
A. V. Novikov
Institute for Physics of Microstructures; Lobachevsky State University of Nizhny Novgorod
Email: Inquisitor@ipmras.ru
Russian Federation, Nizhny Novgorod Region, 603087; Nizhny Novgorod, 603950