Direct observation of the momentum distribution and renormalization factor in lithium

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http://hdl.handle.net/10138/319681

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Hiraoka , N , Yang , Y , Hagiya , T , Niozu , A , Matsuda , K , Huotari , S , Holzmann , M & Ceperley , D M 2020 , ' Direct observation of the momentum distribution and renormalization factor in lithium ' , Physical Review B , vol. 101 , no. 16 , 165124 . https://doi.org/10.1103/PhysRevB.101.165124

Title: Direct observation of the momentum distribution and renormalization factor in lithium
Author: Hiraoka, N.; Yang, Y.; Hagiya, T.; Niozu, A.; Matsuda, K.; Huotari, S.; Holzmann, M.; Ceperley, D. M.
Contributor: University of Helsinki, Department of Physics
Date: 2020-04-20
Language: eng
Number of pages: 5
Belongs to series: Physical Review B
ISSN: 2469-9950
URI: http://hdl.handle.net/10138/319681
Abstract: We have measured the momentum distribution and renormalization factor Z(kF) in liquid and solid lithium by high-resolution Compton scattering. High-resolution data over a wide momentum range exhibit a clear feature of the renormalization and a sharp drop of momentum densities at the Fermi momentum k(F). These results are compared with those computed by quantum Monte Carlo simulation performed both on a disordered crystal and a liquid exhibiting very good agreement. Asymptotic behavior of the experimental and theoretical momentum distributions are examined to estimate Z(kF). The experimentally obtained Z(kF) = 0.43(-0.01)(+0.11) for liquid Li and 0.54(-0.02)(+0.11) for solid Li are in good agreement with theoretical results of 0.54 +/- 0.01 and 0.64 +/- 0.01, respectively.
Subject: MONTE-CARLO CALCULATION
COMPTON PROFILES
SCATTERING
LI
ENERGY
114 Physical sciences
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