Study on momentum density of electrons and Fermi surface in niobium by positron annihilation

• Published in: Journal of the Physical Society of Japan Vol. 59; no. 12; pp. 4494 - 4502
• Main Authors: KUBOTA, T, KONDO, H, WATANABE, K, MURAKAMI, Y, YANG-KOO CHO, TANIGAWA, S, KAWANO, T, GUN-WOONG BAHNG
• Format: Journal Article
• Language: English
• Published: Tokyo Institute of Pure and Applied Physics 1990; Physical Society of Japan; The Physical Society of Japan
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron states; Exact sciences and technology; Fermi surface: calculations and measurements; effective mass, g factor; Metals. Metallurgy; Physics; Momentum distribution; Angular correlation; Transition metal; Positron annihilation; Fermi surface; Experimental study; Niobium
• ISSN: 0031-9015; 1347-4073
• DOI: 10.1143/JPSJ.59.4494

The three dimensional electron-positron momentum density in niobium has been reconstructed from measurements of two dimensional angular correlation of positron annihilation radiations (2D-ACAR) followed by the image reconstruction technique based on a direct Fourier transformation. We determined the position of the Fermi surface sheets; Γ-centered hole octahedron, multiply connected jungle-gym arms and N-centered hole ellipsoids. The Fermi surface topology is in good agreement with the theory.