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Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo

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Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo. / Azadi, Sam; Drummond, Neil; Foulkes, W. M. C.
In: Physical review letters, Vol. 127, No. 8, 086401, 17.08.2021.

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Azadi S, Drummond N, Foulkes WMC. Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo. Physical review letters. 2021 Aug 17;127(8):086401. doi: 10.1103/PhysRevLett.127.086401

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Azadi, Sam ; Drummond, Neil ; Foulkes, W. M. C. / Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo. In: Physical review letters. 2021 ; Vol. 127, No. 8.

Bibtex

@article{3bef7c58df1d483e95826a61862df06f,
title = "Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo",
abstract = "According to Landau{\textquoteright}s Fermi liquid theory, the main properties of the quasiparticle excitations of an electron gas are embodied in the effective mass m∗, which determines the energy of a single quasiparticle, and the Landau interaction function, which indicates how the energy of a quasiparticle is modified by the presence of other quasiparticles. This simple paradigm underlies most of our current understanding of the physical and chemical behavior of metallic systems. The quasiparticle effective mass of the three-dimensional homogeneous electron gas has been the subject of theoretical controversy, and there is a lack of experimental data. In this Letter, we deploy diffusion Monte Carlo (DMC) methods to calculate m∗ as a function of density for paramagnetic and ferromagnetic three-dimensional homogeneous electron gases. The DMC results indicate that m∗ decreases when the density is reduced, especially in the ferromagnetic case. The DMC quasiparticle energy bands exclude the possibility of a reduction in the occupied bandwidth relative to that of the free-electron model at density parameter rs=4, which corresponds to Na metal.",
author = "Sam Azadi and Neil Drummond and Foulkes, {W. M. C.}",
note = "{\textcopyright} 2021 American Physical Society ",
year = "2021",
month = aug,
day = "17",
doi = "10.1103/PhysRevLett.127.086401",
language = "English",
volume = "127",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "8",

}

RIS

TY - JOUR

T1 - Quasiparticle effective mass of the three-dimensional Fermi liquid by quantum Monte Carlo

AU - Azadi, Sam

AU - Drummond, Neil

AU - Foulkes, W. M. C.

N1 - © 2021 American Physical Society

PY - 2021/8/17

Y1 - 2021/8/17

N2 - According to Landau’s Fermi liquid theory, the main properties of the quasiparticle excitations of an electron gas are embodied in the effective mass m∗, which determines the energy of a single quasiparticle, and the Landau interaction function, which indicates how the energy of a quasiparticle is modified by the presence of other quasiparticles. This simple paradigm underlies most of our current understanding of the physical and chemical behavior of metallic systems. The quasiparticle effective mass of the three-dimensional homogeneous electron gas has been the subject of theoretical controversy, and there is a lack of experimental data. In this Letter, we deploy diffusion Monte Carlo (DMC) methods to calculate m∗ as a function of density for paramagnetic and ferromagnetic three-dimensional homogeneous electron gases. The DMC results indicate that m∗ decreases when the density is reduced, especially in the ferromagnetic case. The DMC quasiparticle energy bands exclude the possibility of a reduction in the occupied bandwidth relative to that of the free-electron model at density parameter rs=4, which corresponds to Na metal.

AB - According to Landau’s Fermi liquid theory, the main properties of the quasiparticle excitations of an electron gas are embodied in the effective mass m∗, which determines the energy of a single quasiparticle, and the Landau interaction function, which indicates how the energy of a quasiparticle is modified by the presence of other quasiparticles. This simple paradigm underlies most of our current understanding of the physical and chemical behavior of metallic systems. The quasiparticle effective mass of the three-dimensional homogeneous electron gas has been the subject of theoretical controversy, and there is a lack of experimental data. In this Letter, we deploy diffusion Monte Carlo (DMC) methods to calculate m∗ as a function of density for paramagnetic and ferromagnetic three-dimensional homogeneous electron gases. The DMC results indicate that m∗ decreases when the density is reduced, especially in the ferromagnetic case. The DMC quasiparticle energy bands exclude the possibility of a reduction in the occupied bandwidth relative to that of the free-electron model at density parameter rs=4, which corresponds to Na metal.

U2 - 10.1103/PhysRevLett.127.086401

DO - 10.1103/PhysRevLett.127.086401

M3 - Journal article

VL - 127

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 8

M1 - 086401

ER -