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Title: Non-monotonic temperature dependence of radiation defect dynamics in silicon carbide

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep30931· OSTI ID:1297652
 [1];  [2];  [3];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Texas A&M Univ., College Station, TX (United States)
  3. Texas A&M Univ., College Station, TX (United States)

Understanding response of solids to particle irradiation remains a major materials physics challenge. This applies even to SiC, which is a prototypical nuclear ceramic and wide-band-gap semiconductor material. The lack of predictability is largely related to the complex, dynamic nature of radiation defect formation. Here, we use a novel pulsed-ion-beam method to study dynamic annealing in 4H-SiC ion-bombarded in the temperature range of 25–250 °C. We find that, while the defect recombination efficiency shows an expected monotonic increase with increasing temperature, the defect lifetime exhibits a non-monotonic temperature dependence with a maximum at ~100 °C. This finding indicates a change in the dominant defect interaction mechanism at ~100 °C. As a result, the understanding of radiation defect dynamics may suggest new paths to designing radiation-resistant materials.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1297652
Report Number(s):
LLNL-JRNL-677429; TRN: US1601834
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (4)

Impact of pre-existing disorder on radiation defect dynamics in Si journal August 2019
Radiation defect dynamics in GaAs studied by pulsed ion beams journal July 2018
Dynamic annealing in Ge studied by pulsed ion beams journal October 2017
Effects of collision cascade density on radiation defect dynamics in 3C-SiC journal March 2017

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