Do strange metals carry current in electron-like quasiparticles? · revision history

Revision 2

Accepted · cosmetic change · record

Changes against revision 1:

Title · changed
Revision 1: Do strange metals carry current in electron-like quasiparticles
Revision 2: Do strange metals carry current in electron-like quasiparticles?
Plain
Shot noise, the current fluctuation caused by charge arriving in discrete packets, reveals whether current is carried by electron-like particles; in one strange metal the noise was far smaller than expected.
Precise
Measure the Fano factor $F = S_I/(2 e I)$ in mesoscopic wires of strange metals in the $T$-linear regime and determine whether suppression of $F$ below the Fermi-liquid values ($1/3$ for elastic diffusive transport, $\sqrt{3}/4$ for hot electrons) reflects the absence of quasiparticles or electron-phonon energy relaxation. An answer is a cross-material data set with independently measured electron-phonon length plus a theory of shot noise without quasiparticles that matches it.
Settled by
Length- and temperature-dependent shot-noise measurements in at least two strange-metal families with control wires of a conventional metal in the same geometry.
Kind
well-posed
Answer type
yes-no
References
(empty)
Literature status
contested
Status note · changed
Revision 1: Strongly suppressed shot noise was reported in YbRh2Si2 nanowires in 2023; whether electron-phonon relaxation can explain it is debated.
Revision 2: Strongly suppressed shot noise was reported in $\mathrm{YbRh_2Si_2}$ nanowires in 2023; whether electron-phonon relaxation can explain it is debated.
Posed since
2023

Decisions