Structure and electron–ion correlation of liquid germanium

✍ Scribed by Y. Kawakita; S. Fujita; S. Kohara; K. Ohshima; H. Fujii; Y. Yokota; S. Takeda

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 148 KB
• Volume: 238
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2005.06.032

✦ Synopsis

Structure factor of liquid germanium (Ge) has a shoulder at h = 3.2 A ˚À1 in the high-momentum-transfer region of the first peak. To investigate the origin of such a non-simplicity in the structure, high energy X-ray diffraction measurements have been performed using 113.26 keV incident X-ray, at BL04B2 beamline of SPring-8. By a combination of the obtained structure factor with the reported neutron diffraction data, charge density function and electron-ion partial structure factor have been deduced. The peak position of the charge distribution is located at about 1 A ˚, rather smaller r value than the half value of nearest neighbor distance ($2.7 A ˚), which suggests that valence electrons of liquid Ge play a role of screening electrons around a metallic ion rather than covalently bonding electrons.