Development of a scanning tunneling microscope for in situ experiments with a synchrotron radiation hard-X-ray microbeam.
A scanning tunneling microscope dedicated to in situ experiments under the irradiation of highly brilliant hard-X-rays of synchrotron radiation has been developed. In situ scanning tunneling microscopy (STM) observation was enabled by developing an accurate alignment system in ultrahigh vacuum. Despite the noisy conditions of the synchrotron radiation facility and the radiation load around the probe tip, STM images were successfully obtained at atomic resolution. Tip-current spectra were obtained for Ge nano-islands on a clean Si(111) surface by changing the incident photon energy across the Ge absorption edge. A current modification was detected at the absorption edge with a spatial resolution of the order of 10 nm.
Department of Material and Life Science, Osaka University, Osaka 565-0871, Japan. saito@prec.eng.osaka-u.ac.jp
Akira
A
Saito
Junpei
J
Maruyama
Ken
K
Manabe
Katsuyuki
K
Kitamoto
Koji
K
Takahashi
Kazuhiro
K
Takami
Makina
M
Yabashi
Yoshihito
Y
Tanaka
Daigo
D
Miwa
Masashi
M
Ishii
Yasumasa
Y
Takagi
Megumi
M
Akai-Kasaya
Shik
S
Shin
Tetsuya
T
Ishikawa
Yuji
Y
Kuwahara
Masakazu
M
Aono