Direct imaging of lithium atoms in LiV₂O₄ by spherical aberration-corrected electron microscopy.
We visualized lithium atom columns in LiV₂O₄ crystals by combining scanning transmission electron microscopy with annular bright field (ABF) imaging using a spherical aberration-corrected electron microscope (R005) viewed from the [110] direction. The incident electron beam was coherent with a convergent angle of 30 mrad (semi-angle), and the detector collected scattered electrons over 20-30 mrad (semi-angle). The ABF image showed dark dots corresponding to lithium, vanadium and oxygen columns.
Oshima
Yoshifumi
Y
Japan Science and Technology Agency, CREST, 5 Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan. oshima.y.aa@m.titech.ac.jp
Sawada
Hidetaka
H
Hosokawa
Fumio
F
Okunishi
Eiji
E
Kaneyama
Toshikatsu
T
Kondo
Yukihito
Y
Niitaka
Seiji
S
Takagi
Hidenori
H
Tanishiro
Yasumasa
Y
Takayanagi
Kunio
K