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Extreme Fermi surface smearing in a maximally disordered concentrated solid solution

Research output: Contribution to journalArticle

Original languageEnglish
JournalPhysical Review Letters
DateAccepted/In press - 20 Dec 2019

Abstract

We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni
0.25
Fe
0.25
Co
0.25
Cr
0.25
. Our high-resolution Compton scattering experiments reveal a Fermi surface which is smeared across a significant fraction of the Brillouin zone (up to 40% of
2
π
a

). The extent of this smearing and its variation on and between different sheets of the Fermi surface has been determined, and estimates of the electron mean-free-path and residual resistivity have been made by connecting this smearing with the coherence length of the quasiparticle states.

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