Direct observation of the momentum distribution and renormalization factor in lithium
We have measured the momentum distribution and renormalization factor $$Z_{k_F}$$ 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 $$k_F$$. In this work, 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 $$Z_{k_F}$$. The experimentally obtained $$Z_{k_F} = 0.43^{+0.11}_{–0.01}$$ for liquid Li and $$0.54^{+0.11}_{–0.02}$$ for solid Li are in good agreement with theoretical results of 0.54 ± 0.01 and 0.64 ± 0.01, respectively.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- Grant/Contract Number:
- NA0001789; OCI-0725070; ACI-1238993; NA DE-NA0001789
- OSTI ID:
- 1801050
- Alternate ID(s):
- OSTI ID: 1615432
- Journal Information:
- Physical Review B, Vol. 101, Issue 16; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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