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Title: Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution

Abstract

We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni0.25Fe0.25Co0.25Cr0.25. 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 $$\frac{2π}{a}$$). 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.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [3];  [3];  [2];  [4]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [6]; ORCiD logo [6]; ORCiD logo [6]; ORCiD logo [1]
  1. Univ. of Bristol (United Kingdom)
  2. Cardiff Univ. (United Kingdom)
  3. Univ. of Warwick (United Kingdom)
  4. Data Management and Software Center of the European Spallation Source, Copenhagen (Denmark)
  5. Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Low Temperature and Structure Research
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1606651
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 4; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic structure; Fermi surface; Disordered alloys; Transition-metal alloys; Compton scattering; Density functional theory

Citation Formats

Robarts, Hannah C., Millichamp, Thomas E., Lagos, Daniel A., Laverock, Jude, Billington, David, Duffy, Jonathan A., O’Neill, Daniel, Giblin, Sean R., Taylor, Jonathan W., Kontrym-Sznajd, Grazyna, Samsel-Czekala, Malgorzata, Bei, Hongbin, Mu, Sai, Samolyuk, German D., Stocks, George, and Dugdale, Stephen B. Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevLett.124.046402.
Robarts, Hannah C., Millichamp, Thomas E., Lagos, Daniel A., Laverock, Jude, Billington, David, Duffy, Jonathan A., O’Neill, Daniel, Giblin, Sean R., Taylor, Jonathan W., Kontrym-Sznajd, Grazyna, Samsel-Czekala, Malgorzata, Bei, Hongbin, Mu, Sai, Samolyuk, German D., Stocks, George, & Dugdale, Stephen B. Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution. United States. https://doi.org/10.1103/PhysRevLett.124.046402
Robarts, Hannah C., Millichamp, Thomas E., Lagos, Daniel A., Laverock, Jude, Billington, David, Duffy, Jonathan A., O’Neill, Daniel, Giblin, Sean R., Taylor, Jonathan W., Kontrym-Sznajd, Grazyna, Samsel-Czekala, Malgorzata, Bei, Hongbin, Mu, Sai, Samolyuk, German D., Stocks, George, and Dugdale, Stephen B. Thu . "Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution". United States. https://doi.org/10.1103/PhysRevLett.124.046402. https://www.osti.gov/servlets/purl/1606651.
@article{osti_1606651,
title = {Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution},
author = {Robarts, Hannah C. and Millichamp, Thomas E. and Lagos, Daniel A. and Laverock, Jude and Billington, David and Duffy, Jonathan A. and O’Neill, Daniel and Giblin, Sean R. and Taylor, Jonathan W. and Kontrym-Sznajd, Grazyna and Samsel-Czekala, Malgorzata and Bei, Hongbin and Mu, Sai and Samolyuk, German D. and Stocks, George and Dugdale, Stephen B.},
abstractNote = {We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni0.25Fe0.25Co0.25Cr0.25. 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 $\frac{2π}{a}$). 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.},
doi = {10.1103/PhysRevLett.124.046402},
journal = {Physical Review Letters},
number = 4,
volume = 124,
place = {United States},
year = {2020},
month = {1}
}

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