Swift heavy ion irradiation of GaSb: From ion tracks to nanoporous networks
Date
2020
Authors
Notthoff, Christian
Jordan, Simon
Hadley, Andrea
Mota-Santiago, Pablo
Elliman, Robert
Lei, Wen
Kirby, N
Kluth, Patrick
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Ion track formation, amorphization, and the formation of porosity in crystalline GaSb induced by 185 MeV 197Au swift heavy ion irradiation is investigated as a function of fluence and irradiation angle relative to the surface normal. Rutherford backscattering spectrometry in channeling configuration and small-angle x-ray scattering reveal an ion track radius between 3 and 5 nm. The observed pore morphology and saturation swelling of GaSb films shows a strong irradiation angle dependence. Raman spectroscopy and scanning electron microscopy show that the ion tracks act as a source of strain in the material, leading to macroscopic plastic flow at high fluences and off-normal irradiation. The results are consistent with the ion hammering model for glasses. Furthermore, wide-angle x-ray scattering reveals the formation of nanocrystallites inside otherwise amorphous GaSb after the onset of porosity.
Description
Keywords
Citation
Collections
Source
Physical Review Materials
Type
Journal article
Book Title
Entity type
Access Statement
Open Access