High-resolution Compton scattering study of Li: Asphericity of the Fermi surface and electron correlation effects

Journal Article · Mon Mar 20 00:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.2252· OSTI ID:6567805

Sakurai, Y; Tanaka, Y; Bansil, A; Kaprzyk, S; Stewart, A T; Nagashima, Y; Hyodo, T; Nanao, S; Kawata, H; Shiotani, N ^[1]

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1. Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-01 (Japan) Department of Physics, Northeastern University, Boston, Massachusetts 02115 (United States) Academy of Mining and Metallurgy, Cracow, Al. Mickiewicza 30 (Poland) Physics Department, Queen's University, Ontario K7L 3N6 (Canada) College of General Education, The University of Tokyo, Komaba, Tokyo 153 (Japan) Institute of Industrial Science, The University of Tokyo, Minato, Tokyo 106 (Japan) National Laboratory for High Energy Physics, Tsukuba, Ibaraki, 305 (Japan) Tokyo University of Fisheries, Kounan, Minato, Tokyo 108 (Japan)

We present high-resolution Compton scattering spectra from Li single crystals together with corresponding highly accurate local-density-approximation (LDA) based computations. The data are analyzed to obtain Fermi surface radii along the three principal symmetry directions; the maximum measured anisotropy is found to be (4.6[plus minus]1.0)%. Comparisons between the measured and computed spectra clearly reveal departures from the conventional one-particle LDA picture of the ground state momentum density of the electron gas. This study establishes the potential of Compton scattering as a tool for investigating Fermiology-related issues in materials.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6567805
• Journal Information: Physical Review Letters; (United States), Vol. 74:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPTON SPECTROMETERS
LITHIUM
ELECTRONIC STRUCTURE
ANISOTROPY
COMPTON EFFECT
CORRELATION FUNCTIONS
ENERGY RESOLUTION
FERMI LEVEL
MEASURING METHODS
SYNCHROTRON RADIATION
ALKALI METALS
BASIC INTERACTIONS
BREMSSTRAHLUNG
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
FUNCTIONS
GAMMA SPECTROMETERS
INTERACTIONS
MEASURING INSTRUMENTS
METALS
RADIATIONS
RESOLUTION
SCATTERING
SPECTROMETERS
360104* - Metals & Alloys- Physical Properties
665100 - Nuclear Techniques in Condensed Matter Physics - (1992-)