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PreprintCC BY 4.0arXiv

Disorder into Correlation: A Microscopic Mechanism for Sub-McIntyre Avalanche Noise

  • Shafat Shahnewaz
  • Hannaneh Karimi
  • Joe C. Campbell
  • Avik W. Ghosh
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Abstract

Avalanche multiplication is intrinsically stochastic, yet experiments reveal excess noise below the minimum predicted by McIntyre's local-field theory. The microscopic origin of this noise suppression remains incompletely understood. We show that polar-optical-phonon emission, confined to a narrow forward cone, competes with elastic alloy scattering that diffuses field-collimated hot carriers out of the cone. Suppressed phonon cooling narrows the ionization path beyond the dead space and synchronizes successive ionizations into a dynamic staircase. This explains the low noise of Sb-based alloys and HgCdTe and makes alloy disorder a design parameter.

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Cite

BibTeXRIS
BibTeX
@misc{shahnewaz2026disorder,
  title = {{Disorder into Correlation: A Microscopic Mechanism for Sub-McIntyre Avalanche Noise}},
  author = {Shafat Shahnewaz and Hannaneh Karimi and Joe C. Campbell and Avik W. Ghosh},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.06915},
  eprint = {2610.06915},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.06915},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Disorder into Correlation: A Microscopic Mechanism for Sub-McIntyre Avalanche Noise
AU  - Shafat Shahnewaz
AU  - Hannaneh Karimi
AU  - Joe C. Campbell
AU  - Avik W. Ghosh
PY  - 2026
DA  - 2026/10/02
PB  - arXiv
DO  - 10.48550/arxiv.2610.06915
UR  - https://arxiv.org/abs/2610.06915
AB  - Avalanche multiplication is intrinsically stochastic, yet experiments reveal excess noise below the minimum predicted by McIntyre's local-field theory. The microscopic origin of this noise suppression remains incompletely understood. We show that polar-optical-phonon emission, confined to a narrow forward cone, competes with elastic alloy scattering that diffuses field-collimated hot carriers out of the cone. Suppressed phonon cooling narrows the ionization path beyond the dead space and synchronizes successive ionizations into a dynamic staircase. This explains the low noise of Sb-based alloys and HgCdTe and makes alloy disorder a design parameter.
ER  -