Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution
2020; American Physical Society; Volume: 124; Issue: 4 Linguagem: Inglês
10.1103/physrevlett.124.046402
ISSN1092-0145
AutoresH. C. Robarts, Thomas E. Millichamp, Daniel A. Lagos, J. Laverock, David P. Billington, Jonathan A. Duffy, Daniel O’Neill, S. R. Giblin, Jonathan Taylor, G. Kontrym‐Sznajd, M. Samsel–Czekała, Hongbin Bei, Sai Mu, German D. Samolyuk, G. M. Stocks, S. B. Dugdale,
Tópico(s)High-pressure geophysics and materials
ResumoWe 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 2π/a). The extent of this smearing and its variation on and between different sheets of the Fermi surface have 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.
Referência(s)