准粒子
物理
散粒噪声
Fano因子
凝聚态物理
噪音(视频)
量子力学
超导电性
光学
计算机科学
探测器
图像(数学)
人工智能
作者
Alexander Nikolaenko,Subir Sachdev,Aavishkar A. Patel
标识
DOI:10.1103/physrevresearch.5.043143
摘要
We extend the theory of shot noise in coherent metals to shot noise in strange metals without quasiparticle excitations. This requires a generalization of the Boltzmann equation with a noise source to distribution functions which depend independently on the excitation momentum and energy. We apply this theory to a model of a strange metal with linear in temperature ($T$) resistivity, describing a Fermi surface with a spatially random Yukawa coupling to a critical boson. We find a suppression of the Fano factor in the strange metal, and describe the dependence of the shot noise on temperature and applied voltage. At low temperatures, we obtain a Fano factor equal to $1/6$, in contrast to the $1/3$ Fano factor in diffusive metals with quasiparticles. Our results are in general agreement with recent observations by Chen et al. (arXiv:2206.00673). We further compare the random Yukawa model to quasi-elastic electron-phonon scattering that also generates $T$-linear resistivity, and argue that shot noise observations offer a useful diagnostic to distinguish between them.
科研通智能强力驱动
Strongly Powered by AbleSci AI