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October 8, 2025Open Access

Effect of Group-V Impurities on the Electronic Properties of Germanium Detectors: An Insight from First-Principles Calculations

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Authors

SASandip AryalLos Alamos National LaboratoryEBEnrique R. BatistaLos Alamos National LaboratoryGWGaoxue WangLos Alamos National Laboratory

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Implication

Density functional theory reveals charge trapping mechanisms in germanium from group-V impurities, suggesting performance limitations.

Key Points

  • The presence of n-type group-V impurities significantly affects energy resolution in germanium detectors, leading to charge trapping.
  • Density functional theory shows that phosphorus, arsenic, and antimony create shallow traps, while nitrogen leads to deep trap states.
  • Defect complexes formed by n-type defects and germanium vacancies provide deep traps in detectors, degrading their performance.
  • The study underscores the importance of purity in germanium detectors to achieve optimal energy sensitivity and resolution.

Cite This Study

Aryal et al. (2025) studied this question.

synapsesocial.com/papers/68e6a0f4718ef0a556b33eedhttps://doi.org/10.48550/arxiv.2507.17676
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1First-Principles insights into group-V impurities and their impact on germanium detector performance2025 · 1 citations
  2. 2Exploring the Potential of Residual Impurities in Germanium Detectors for MeV-Scale Dark Matter Detection2024 · 3 citations
  3. 3Investigating Influential Parameters for High-Purity Germanium Crystal Growth2024 · 7 citations
  4. 4Hybrid density functional theory simulation of sodium impurity and impurity–vacancy defect complexes in germanium: perspectives of defect engineering for activation of shallow donors2024 · 4 citations
  5. 5Donor-induced electrically charged defect levels: examining the role of indium and n-type defect-complexes in germanium2024 · 4 citations