Extreme fermi surface smearing in a maximally disordered concentrated solid soluti

Robarts, Hannah C., Millichamp, Thomas E., Lagos, Daniel A., Laverock, Jude, Billington, David, Duffy, Jonathan A., O'Neill, Daniel, Giblin, Sean R. ORCID: https://orcid.org/0000-0003-1876-8619, Taylor, Jonathan W., Kontrym-Sznajd, Grazyna, Samsel-Czekala, Malgorzata, Bei, Hongbin, Mu, Sai, Stocks, G. Malcolm, Samolyuk, German D. and Dugdale, Stephen B. 2020. Extreme fermi surface smearing in a maximally disordered concentrated solid soluti. Physical Review Letters 124 (4) , 046402. 10.1103/PhysRevLett.124.046402

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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 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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	0031-9007
Date of First Compliant Deposit:	31 January 2020
Date of Acceptance:	30 January 2020
Last Modified:	05 May 2023 19:26
URI:	https://orca.cardiff.ac.uk/id/eprint/129223

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