Cold nanoindentation of germanium

L. Q. Huston; M. S.R.N. Kiran; L. A. Smillie; J. S. Williams; J. E. Bradby

doi:10.1063/1.4993163

Cold nanoindentation of germanium

L. Q. Huston^*, M. S.R.N. Kiran, L. A. Smillie, J. S. Williams, J. E. Bradby

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Diamond cubic Ge is subjected to high pressures via nanoindentation at temperatures between -45 °C and 20 °C. The residual impressions are studied using ex-situ Raman microspectroscopy and cross-sectional transmission electron microscopy. The deformation mechanism at 20 °C is predominately via the generation of crystalline defects. However, when the temperature is lowered, the analysis of residual indentation impressions provides evidence for deformation by phase transformation and formation of additional phases such as r8-Ge, hd-Ge, and amorphous Ge. Furthermore, these results show that at 0 °C and below, dc-Ge will reliably phase transform via nanoindentation.

Original language	English
Article number	021901
Journal	Applied Physics Letters
Volume	111
Issue number	2
DOIs	https://doi.org/10.1063/1.4993163
Publication status	Published - 10 Jul 2017

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title = "Cold nanoindentation of germanium",

abstract = "Diamond cubic Ge is subjected to high pressures via nanoindentation at temperatures between -45 °C and 20 °C. The residual impressions are studied using ex-situ Raman microspectroscopy and cross-sectional transmission electron microscopy. The deformation mechanism at 20 °C is predominately via the generation of crystalline defects. However, when the temperature is lowered, the analysis of residual indentation impressions provides evidence for deformation by phase transformation and formation of additional phases such as r8-Ge, hd-Ge, and amorphous Ge. Furthermore, these results show that at 0 °C and below, dc-Ge will reliably phase transform via nanoindentation.",

author = "Huston, {L. Q.} and Kiran, {M. S.R.N.} and Smillie, {L. A.} and Williams, {J. S.} and Bradby, {J. E.}",

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doi = "10.1063/1.4993163",

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AU - Huston, L. Q.

AU - Kiran, M. S.R.N.

AU - Smillie, L. A.

AU - Williams, J. S.

AU - Bradby, J. E.

PY - 2017/7/10

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N2 - Diamond cubic Ge is subjected to high pressures via nanoindentation at temperatures between -45 °C and 20 °C. The residual impressions are studied using ex-situ Raman microspectroscopy and cross-sectional transmission electron microscopy. The deformation mechanism at 20 °C is predominately via the generation of crystalline defects. However, when the temperature is lowered, the analysis of residual indentation impressions provides evidence for deformation by phase transformation and formation of additional phases such as r8-Ge, hd-Ge, and amorphous Ge. Furthermore, these results show that at 0 °C and below, dc-Ge will reliably phase transform via nanoindentation.

AB - Diamond cubic Ge is subjected to high pressures via nanoindentation at temperatures between -45 °C and 20 °C. The residual impressions are studied using ex-situ Raman microspectroscopy and cross-sectional transmission electron microscopy. The deformation mechanism at 20 °C is predominately via the generation of crystalline defects. However, when the temperature is lowered, the analysis of residual indentation impressions provides evidence for deformation by phase transformation and formation of additional phases such as r8-Ge, hd-Ge, and amorphous Ge. Furthermore, these results show that at 0 °C and below, dc-Ge will reliably phase transform via nanoindentation.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Cold nanoindentation of germanium

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