1998/06/29 by Y. Naveh, Naveh, Y.
Medicine · Physics and Astronomy · #Advanced MRI Techniques and Applications #Atomic and Subatomic Physics Research #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9806348
3 pages, 2 figures. Fig. 1 is color-coded - hard copies also available from author. Note change in e-mail address
arxiv created 1998/06/29 · openalex publication_date 1998/06/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using the 'drift-diffusion-Langevin' equation we show that, at least in one geometry, finite-frequency shot noise is of the order of the 'full' shot noise 2eI provided the sample is either short or long enough, L > L0(ω). Here L0(ω) = D'/\lph ω with D' the effective diffusion coefficient, \lph the electron-phonon energy relaxation length with energy transfer eV, and ω the observation frequency. For example, in a typical 'zero frequency' experiment, actually performed at 10 KHz, shot noise may be large for L larger than a few centimeters. At 100 MHz shot noise may be large for any length of the sample. The physical reason for this result -- a competition between the equilibration length and the dynamic screening length -- is discussed in the text.