Evidence for the R8 phase of germanium

Brett C. Johnson; Bianca Haberl; Sarita Deshmukh; Brad D. Malone; Marvin L. Cohen; Jeffrey C. McCallum; James S. Williams; Jodie E. Bradby

doi:10.1103/PhysRevLett.110.085502

Evidence for the R8 phase of germanium

Brett C. Johnson, Bianca Haberl, Sarita Deshmukh, Brad D. Malone, Marvin L. Cohen, Jeffrey C. McCallum, James S. Williams, Jodie E. Bradby

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

30 Scopus citations

Abstract

The formation of R8 germanium is reported. The β-Sn phase is first induced by the indentation of amorphous germanium (a-Ge) and the resultant phases on pressure release are characterized by Raman scattering. The expected Raman line frequencies for the various phases of Ge are determined from first-principles calculations using density functional perturbation theory of the zone-center phonons in the diamond, ST12, BC8, and R8 Ge phases. In addition to the R8 phase, traces of BC8 may also be present following pressure release.

Original language	English
Article number	085502
Journal	Physical Review Letters
Volume	110
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.110.085502
State	Published - Feb 20 2013
Externally published	Yes

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10.1103/PhysRevLett.110.085502

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title = "Evidence for the R8 phase of germanium",

abstract = "The formation of R8 germanium is reported. The β-Sn phase is first induced by the indentation of amorphous germanium (a-Ge) and the resultant phases on pressure release are characterized by Raman scattering. The expected Raman line frequencies for the various phases of Ge are determined from first-principles calculations using density functional perturbation theory of the zone-center phonons in the diamond, ST12, BC8, and R8 Ge phases. In addition to the R8 phase, traces of BC8 may also be present following pressure release.",

author = "Johnson, {Brett C.} and Bianca Haberl and Sarita Deshmukh and Malone, {Brad D.} and Cohen, {Marvin L.} and McCallum, {Jeffrey C.} and Williams, {James S.} and Bradby, {Jodie E.}",

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AU - Johnson, Brett C.

AU - Haberl, Bianca

AU - Deshmukh, Sarita

AU - Malone, Brad D.

AU - Cohen, Marvin L.

AU - McCallum, Jeffrey C.

AU - Williams, James S.

AU - Bradby, Jodie E.

PY - 2013/2/20

Y1 - 2013/2/20

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AB - The formation of R8 germanium is reported. The β-Sn phase is first induced by the indentation of amorphous germanium (a-Ge) and the resultant phases on pressure release are characterized by Raman scattering. The expected Raman line frequencies for the various phases of Ge are determined from first-principles calculations using density functional perturbation theory of the zone-center phonons in the diamond, ST12, BC8, and R8 Ge phases. In addition to the R8 phase, traces of BC8 may also be present following pressure release.

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JO - Physical Review Letters

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Evidence for the R8 phase of germanium

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