TY - JOUR
T1 - p- and n-Type Ba8Ga16Ge30 studied by X-ray photoelectron spectroscopy
AU - Tang, Jun
AU - Kumashiro, Ryotaro
AU - Ju, Jing
AU - Li, Zhaofei
AU - Avila, Marcos A.
AU - Suekuni, Kouichirou
AU - Takabatake, Toshiro
AU - Guo, Fangzhun
AU - Kobayashi, Keisuke
AU - Tanigaki, Katsumi
N1 - Funding Information:
We are grateful to the staff members at SPring-8 (beamline BL02B2 and BLSU25). The synchrotron radiation experiments were performed with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) as Nanotechnology Support Project. This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan, Nos. 18204030, 19014001, 18651075 and 18204032. This work was also supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science No. P07025.
PY - 2009/4/6
Y1 - 2009/4/6
N2 - The electronic properties of p- and n-type Ba8Ga16Ge30 (BGG) are studied using soft X-ray photoelectron spectroscopy at a high-energy facility. Three bands are resolved in the valence band region. The first band for n-type BGG is sensitive to temperature, while the second band is sensitive for p-type BGG. The change in the ratio of Ba to Ga, from which the carrier type is controlled in this system, modifies the positions of Ga residing at the larger (Ga-CGe)24 cage. This modification in the host network is responsible for the large differences observed in electronic properties of p- and n-BGGs in this clathrate family.
AB - The electronic properties of p- and n-type Ba8Ga16Ge30 (BGG) are studied using soft X-ray photoelectron spectroscopy at a high-energy facility. Three bands are resolved in the valence band region. The first band for n-type BGG is sensitive to temperature, while the second band is sensitive for p-type BGG. The change in the ratio of Ba to Ga, from which the carrier type is controlled in this system, modifies the positions of Ga residing at the larger (Ga-CGe)24 cage. This modification in the host network is responsible for the large differences observed in electronic properties of p- and n-BGGs in this clathrate family.
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U2 - 10.1016/j.cplett.2009.02.061
DO - 10.1016/j.cplett.2009.02.061
M3 - Article
AN - SCOPUS:62949103797
VL - 472
SP - 60
EP - 64
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -