Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]

N. E B Cowern, S. Simdyankin, J. P. Goss, E. Napolitani, D. De Salvador, E. Bruno, S. Mirabella, C. Ahn, N. S. Bennett

Research output: Contribution to journalComment/debate

Abstract

The authors of the above paper call into question recent evidence on the properties of self-interstitials, I, in Ge [Cowern et al., Phys. Rev. Lett. 110, 155501 (2013)]. We show that this judgment stems from invalid model assumptions during analysis of data on B marker-layer diffusion during proton irradiation, and that a corrected analysis fully supports the reported evidence. As previously stated, I-mediated self-diffusion in Ge exhibits two distinct regimes of temperature, T: high-T, dominated by amorphous-like mono-interstitial clusters - i-morphs - with self-diffusion entropy30k, and low-T, where transport is dominated by simple self-interstitials. In a transitional range centered on 475°C both mechanisms contribute. The experimental I migration energy of 1.84±0.26 eV reported by the Münster group based on measurements of self-diffusion during irradiation at 550°C<T<680°C further establishes our proposed i-morph mechanism.

Original languageEnglish
Article number036101
JournalApplied Physics Reviews
Volume2
Issue number3
DOIs
Publication statusPublished - Sep 2015

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germanium
interstitials
proton irradiation
stems
markers
irradiation
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Cowern, N. E. B., Simdyankin, S., Goss, J. P., Napolitani, E., De Salvador, D., Bruno, E., ... Bennett, N. S. (2015). Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]. Applied Physics Reviews, 2(3), [036101]. https://doi.org/10.1063/1.4929762
Cowern, N. E B ; Simdyankin, S. ; Goss, J. P. ; Napolitani, E. ; De Salvador, D. ; Bruno, E. ; Mirabella, S. ; Ahn, C. ; Bennett, N. S. / Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]. In: Applied Physics Reviews. 2015 ; Vol. 2, No. 3.
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Cowern, NEB, Simdyankin, S, Goss, JP, Napolitani, E, De Salvador, D, Bruno, E, Mirabella, S, Ahn, C & Bennett, NS 2015, 'Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]', Applied Physics Reviews, vol. 2, no. 3, 036101. https://doi.org/10.1063/1.4929762

Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]. / Cowern, N. E B; Simdyankin, S.; Goss, J. P.; Napolitani, E.; De Salvador, D.; Bruno, E.; Mirabella, S.; Ahn, C.; Bennett, N. S.

In: Applied Physics Reviews, Vol. 2, No. 3, 036101, 09.2015.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]

AU - Cowern, N. E B

AU - Simdyankin, S.

AU - Goss, J. P.

AU - Napolitani, E.

AU - De Salvador, D.

AU - Bruno, E.

AU - Mirabella, S.

AU - Ahn, C.

AU - Bennett, N. S.

PY - 2015/9

Y1 - 2015/9

N2 - The authors of the above paper call into question recent evidence on the properties of self-interstitials, I, in Ge [Cowern et al., Phys. Rev. Lett. 110, 155501 (2013)]. We show that this judgment stems from invalid model assumptions during analysis of data on B marker-layer diffusion during proton irradiation, and that a corrected analysis fully supports the reported evidence. As previously stated, I-mediated self-diffusion in Ge exhibits two distinct regimes of temperature, T: high-T, dominated by amorphous-like mono-interstitial clusters - i-morphs - with self-diffusion entropy30k, and low-T, where transport is dominated by simple self-interstitials. In a transitional range centered on 475°C both mechanisms contribute. The experimental I migration energy of 1.84±0.26 eV reported by the Münster group based on measurements of self-diffusion during irradiation at 550°C<T<680°C further establishes our proposed i-morph mechanism.

AB - The authors of the above paper call into question recent evidence on the properties of self-interstitials, I, in Ge [Cowern et al., Phys. Rev. Lett. 110, 155501 (2013)]. We show that this judgment stems from invalid model assumptions during analysis of data on B marker-layer diffusion during proton irradiation, and that a corrected analysis fully supports the reported evidence. As previously stated, I-mediated self-diffusion in Ge exhibits two distinct regimes of temperature, T: high-T, dominated by amorphous-like mono-interstitial clusters - i-morphs - with self-diffusion entropy30k, and low-T, where transport is dominated by simple self-interstitials. In a transitional range centered on 475°C both mechanisms contribute. The experimental I migration energy of 1.84±0.26 eV reported by the Münster group based on measurements of self-diffusion during irradiation at 550°C<T<680°C further establishes our proposed i-morph mechanism.

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Cowern NEB, Simdyankin S, Goss JP, Napolitani E, De Salvador D, Bruno E et al. Comment on “Diffusion of n-type dopants in germanium” [Appl. Phys. Rev. 1, 011301 (2014)]. Applied Physics Reviews. 2015 Sep;2(3). 036101. https://doi.org/10.1063/1.4929762