Imperial College London
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Matthew Foulkes

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

wmc.foulkes Website

 
 
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Location

 

810Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Azadi:2021:10.1103/PhysRevLett.127.086401,
author = {Azadi, S and Drummond, ND and Foulkes, WMC},
doi = {10.1103/PhysRevLett.127.086401},
journal = {Physical Review Letters},
pages = {1--6},
title = {Quasiparticle effective mass of the three-dimensional fermi liquid by quantum Monte Carlo},
url = {http://dx.doi.org/10.1103/PhysRevLett.127.086401},
volume = {127},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - According to Landau's Fermi liquid theory, the main properties of thequasiparticle excitations of an electron gas are embodied in the effective mass$m^$, which determines the energy of a single quasiparticle, and the Landauinteraction function, which indicates how the energy of a quasiparticle ismodified by the presence of other quasiparticles. This simple paradigmunderlies most of our current understanding of the physical and chemicalbehavior of metallic systems. The quasiparticle effective mass of thethree-dimensional homogeneous electron gas has been the subject of theoreticalcontroversy and there is a lack of experimental data. In this work, we deploydiffusion Monte Carlo (DMC) methods to calculate $m^$ as a function of densityfor paramagnetic and ferromagnetic three-dimensional homogeneous electrongases. The DMC results indicate that $m^$ decreases when the density isreduced, especially in the ferromagnetic case. The DMC quasiparticle energybands exclude the possibility of a reduction in the occupied bandwidth relativeto that of the free-electron model at density parameter $r_s=4$, whichcorresponds to Na metal.
AU  - Azadi,S
AU  - Drummond,ND
AU  - Foulkes,WMC
DO  - 10.1103/PhysRevLett.127.086401
EP  - 6
PY  - 2021///
SN  - 0031-9007
SP  - 1
TI  - Quasiparticle effective mass of the three-dimensional fermi liquid by quantum Monte Carlo
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.127.086401
UR  - http://arxiv.org/abs/2105.09139v1
UR  - https://link.aps.org/doi/10.1103/PhysRevLett.127.086401
UR  - http://hdl.handle.net/10044/1/90528
VL  - 127
ER  -
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