On erbium lattice location in ion implanted Si0.75Ge0.25 alloy: Computer simulation of Rutherford backscattering/channeling | Zendy

V. Touboltsev | Zendy; Pasi Jalkanen | Zendy; J. Räisänen | Zendy; P.J.M. Smulders | Zendy

Open Access

On erbium lattice location in ion implanted Si0.75Ge0.25 alloy: Computer simulation of Rutherford backscattering/channeling

Author(s) -

V. Touboltsev,

Pasi Jalkanen,

J. Räisänen,

P.J.M. Smulders

Publication year - 2003

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1555269

Subject(s) - rutherford backscattering spectrometry , materials science , erbium , fluence , channelling , ion implantation , ion , rutherford scattering , ytterbium , lattice (music) , alloy , silicon , scattering , atomic physics , thin film , chemistry , optics , doping , optoelectronics , physics , metallurgy , small angle neutron scattering , nanotechnology , neutron scattering , organic chemistry , acoustics

A high crystalline quality Si0.75Ge0.25 alloy layer grown by chemical vapor deposition was implanted with 70 keV Er+ ions to a fluence of 1015 cm−2 at temperature of 550 °C. The implantation was found to result in an Er depth distribution with 1 at. % maximum concentration 30 nm beneath the surface. The location of the erbium atoms in the host matrix lattice is derived through computer simulation of experimental axial channeling angular scans measured by in situ Rutherford backscattering/channeling spectrometry. Using computer code FLUX 7.7 it is shown that 60% of the implanted erbium atoms are located at ytterbium sites, 10% at tetrahedral sites, and the remainder are associated with random locations in the host matrix.A high crystalline quality Si0.75Ge0.25 alloy layer grown by chemical vapor deposition was implanted with 70 keV Er+ ions to a fluence of 1015 cm−2 at temperature of 550 °C. The implantation was found to result in an Er depth distribution with 1 at. % maximum concentration 30 nm beneath the surface. The location of the erbium atoms in the host matrix lattice is derived through computer simulation of experimental axial channeling angular scans measured by in situ Rutherford backscattering/channeling spectrometry. Using computer code FLUX 7.7 it is shown that 60% of the implanted erbium atoms are located at ytterbium sites, 10% at tetrahedral sites, and the remainder are associated with random locations in the host matrix.

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