Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution

Hannah C. Robarts; Thomas E. Millichamp; Daniel A. Lagos; Jude Laverock; David Billington; Jonathan A. Duffy; Daniel O’Neill; Sean R. Giblin; Jonathan W. Taylor; Grazyna Sznajd; Małgorzata Samsel-Czekała; Hongbin Bei; Sai Mu; German D. Samolyuk; G. Malcolm Stocks; Stephen Dugdale

doi:10.1103/physrevlett.124.046402

Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution

Hannah C. Robarts, Thomas E. Millichamp, Daniel A. Lagos, Jude Laverock, David Billington, Jonathan A. Duffy, Daniel O’Neill, Sean R. Giblin, Jonathan W. Taylor, Grazyna Sznajd, Małgorzata Samsel-Czekała, Hongbin Bei, Sai Mu, German D. Samolyuk, G. Malcolm Stocks, Stephen Dugdale

Department of Physics

Research output: Contribution to journal › Article › peer-review

28 Citations (SciVal)

Abstract

We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni0.25⁢Fe0.25⁢Co0.25⁢Cr0.25. 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.

Original language	English
Article number	046402
Journal	Physical Review Letters
Volume	124
DOIs	https://doi.org/10.1103/physrevlett.124.046402
Publication status	Published - 30 Jan 2020

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Robarts, H. C., Millichamp, T. E., Lagos, D. A., Laverock, J., Billington, D., Duffy, J. A., O’Neill, D., Giblin, S. R., Taylor, J. W., Sznajd, G., Samsel-Czekała, M., Bei, H., Mu, S., Samolyuk, G. D., Stocks, G. M., & Dugdale, S. (2020). Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution. Physical Review Letters, 124, Article 046402. https://doi.org/10.1103/physrevlett.124.046402

Robarts, HC, Millichamp, TE, Lagos, DA, Laverock, J, Billington, D, Duffy, JA, O’Neill, D, Giblin, SR, Taylor, JW, Sznajd, G, Samsel-Czekała, M, Bei, H, Mu, S, Samolyuk, GD, Stocks, GM & Dugdale, S 2020, 'Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution', Physical Review Letters, vol. 124, 046402. https://doi.org/10.1103/physrevlett.124.046402

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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 Ni0.25⁢Fe0.25⁢Co0.25⁢Cr0.25. 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.",

author = "Robarts, {Hannah C.} and Millichamp, {Thomas E.} and Lagos, {Daniel A.} and Jude Laverock and David Billington and Duffy, {Jonathan A.} and Daniel O{\textquoteright}Neill and Giblin, {Sean R.} and Taylor, {Jonathan W.} and Grazyna Sznajd and Ma{\l}gorzata Samsel-Czeka{\l}a and Hongbin Bei and Sai Mu and Samolyuk, {German D.} and Stocks, {G. Malcolm} and Stephen Dugdale",

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doi = "10.1103/physrevlett.124.046402",

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AU - Robarts, Hannah C.

AU - Millichamp, Thomas E.

AU - Lagos, Daniel A.

AU - Laverock, Jude

AU - Billington, David

AU - Duffy, Jonathan A.

AU - O’Neill, Daniel

AU - Giblin, Sean R.

AU - Taylor, Jonathan W.

AU - Sznajd, Grazyna

AU - Samsel-Czekała, Małgorzata

AU - Bei, Hongbin

AU - Mu, Sai

AU - Samolyuk, German D.

AU - Stocks, G. Malcolm

AU - Dugdale, Stephen

PY - 2020/1/30

Y1 - 2020/1/30

N2 - We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni0.25⁢Fe0.25⁢Co0.25⁢Cr0.25. 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.

AB - We show that the Fermi surface can survive the presence of extreme compositional disorder in the equiatomic alloy Ni0.25⁢Fe0.25⁢Co0.25⁢Cr0.25. 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.

U2 - 10.1103/physrevlett.124.046402

DO - 10.1103/physrevlett.124.046402

M3 - Article

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 046402

ER -

Extreme Fermi Surface Smearing in a Maximally Disordered Concentrated Solid Solution

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