Shot noise in a phenomenological model of a marginal Fermi liquid
ORAL
Abstract
The strange metal is a mysterious non-Fermi liquid which shows linear-in-T resistivity behavior at finite temperatures, and, as found in recent experiment, vanishingly small shot noise in the linear-in-T regime. Here, we investigate the shot noise of a strange metal based on a phenomenological model of marginal Fermi liquid (MFL), where fermions couple to some collective boson mode, leading to T-linear scattering rate at finite T. It is found that in the diffusive regime where the MFL scattering length is small compared to the system size, the shot noise vanishes, and the thermal noise becomes a temperature- and voltage-independent constant. Introducing additional impurity scattering increases the shot noise, and is probably consistent with the current experiment.
*Y.-M.W. acknowledges the Gordon and Betty Moore Foundation's EPiQS Initiative through GBMF8686 for support. J.J.Y. was supported in part by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1656518. Y.- M. W., J.J.Y. and S.R. are supported in part by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-76SF00515.
–
Publication: arXiv:2409.16398
Presenters
-
Yi-Ming Wu
- Stanford Institute for Theoretical Physics
- Stanford University