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 Kontrym-Sznajd; Malgorzata Samsel-Czekala; Hongbin Bei; Sai Mu; German D. Samolyuk; G. Malcolm Stocks; Stephen B. 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 Kontrym-Sznajd, Malgorzata Samsel-Czekala, Hongbin Bei, Sai Mu, German D. Samolyuk, G. Malcolm Stocks, Stephen B. Dugdale

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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 2π=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.

Original language	English
Article number	046402
Number of pages	6
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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Electronic Structure and Magnetic Properties of Transition Metal High Entropy Alloys
Author: Lagos, D. A., 12 May 2020
Supervisor: Dugdale, S. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of Philosophy (PhD)

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NiFeCoCr
Dugdale, S. B. (Creator), University of Bristol, 1 Nov 2019
DOI: 10.5523/bris.1a9u533pcxzk23lbwu1p56ica, http://data.bris.ac.uk/data/dataset/1a9u533pcxzk23lbwu1p56ica
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HPC (High Performance Computing) Facility
Polly E Eccleston (Other), Simon H Atack (Other), D A G Williams (Manager), Sadaf R Alam (Manager) & Steven A Chapman (Manager)
Facility/equipment: Facility

Professor Stephen B Dugdale
- S.B.Dugdalebristol.acuk
- School of Physics - Professor of Physics
Person: Academic

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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., Kontrym-Sznajd, G., Samsel-Czekala, M., Bei, H., Mu, S., Samolyuk, G. D., Stocks, G. M., & Dugdale, S. B. (2020). Extreme Fermi surface smearing in a maximally disordered concentrated solid solution. Physical Review Letters, 124, [046402]. https://doi.org/10.1103/PhysRevLett.124.046402

@article{88b37a6b546947b1a1db727f0f9ec515,

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 2π=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.",

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'Neill and Giblin, {Sean R.} and Taylor, {Jonathan W.} and Grazyna Kontrym-Sznajd and Malgorzata Samsel-Czekala and Hongbin Bei and Sai Mu and Samolyuk, {German D.} and Stocks, {G. Malcolm} and Dugdale, {Stephen B.}",

year = "2020",

month = jan,

day = "30",

doi = "10.1103/PhysRevLett.124.046402",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

}

Robarts, HC, Millichamp, TE, Lagos, DA, Laverock, J, Billington, D, Duffy, JA, O'Neill, D, Giblin, SR, Taylor, JW, Kontrym-Sznajd, G, Samsel-Czekala, M, Bei, H, Mu, S, Samolyuk, GD, Stocks, GM & Dugdale, SB 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

TY - JOUR

T1 - Extreme Fermi surface smearing in a maximally disordered concentrated solid solution

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 - Kontrym-Sznajd, Grazyna

AU - Samsel-Czekala, Malgorzata

AU - Bei, Hongbin

AU - Mu, Sai

AU - Samolyuk, German D.

AU - Stocks, G. Malcolm

AU - Dugdale, Stephen B.

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 Ni0.25Fe0.25Co0.25Cr0.25. 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 2π=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.

AB - 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 2π=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.

U2 - 10.1103/PhysRevLett.124.046402

DO - 10.1103/PhysRevLett.124.046402

M3 - Article (Academic Journal)

C2 - 32058766

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

M1 - 046402

ER -

Extreme Fermi surface smearing in a maximally disordered concentrated solid solution

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Student Theses

Electronic Structure and Magnetic Properties of Transition Metal High Entropy Alloys

Datasets

NiFeCoCr

Equipment

HPC (High Performance Computing) Facility

Profiles

Professor Stephen B Dugdale

Cite this