发表机构
University of Virginia（弗吉尼亚大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究揭示极-光学-声子发射与弹性合金散射的竞争抑制声子冷却，使电离路径变窄并同步化，从而解释亚麦金太尔雪崩噪声，并将合金无序作为设计参数。
AI 中文摘要
雪崩倍增本质上是随机的，然而实验显示在麦金太尔局域场理论预测的最小值以下存在过量噪声。这种噪声抑制的微观起源尚未完全理解。我们表明，极-光学-声子发射被限制在窄前向锥内，与弹性合金散射竞争，后者将场准直的热载流子扩散出锥体。受抑制的声子冷却使电离路径在死区之外变窄，并将连续电离同步为动态阶梯。这解释了锑基合金和碲镉汞的低噪声，并使合金无序成为设计参数。
英文摘要
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.
