TY - JOUR
T1 - High energy-resolution electron energy-loss spectroscopy analysis of dielectric property and electronic structure of hexagonal diamond
AU - Sato, Yohei
AU - Terauchi, Masami
AU - Inami, Wataru
AU - Yoshiasa, Akira
N1 - Funding Information:
The authors thank Mr. F. Sato for his skillful technical assistance. The present research was supported in part by a Grant-in-Aid for Scientific Research in Priority Area, “New Materials Science Using Regulated Nano Space Strategy in Ubiquitous Elements” by the Ministry of Education, Culture, Sports, Science, and Technology of Japan (No. 19051002 ).
PY - 2012/5
Y1 - 2012/5
N2 - Electron energy-loss spectroscopy measurements of a hexagonal diamond (h-DIA) were performed using a transmission electron microscope equipped with a monochromator. From the measurements, the dielectric function of h-DIA was derived using Kramers-Kronig analysis (KKA) for the first time. The results of KKA showed that the band gap energy of h-DIA was 4.2 eV, which is 1.3 eV smaller than that of a cubic diamond (c-DIA). The peak energies that appeared in the imaginary part of the dielectric function were assigned to the interband transition energies predicted by theoretical calculations. The K-shell excitation spectrum of h-DIA, which was apparently different from that of c-DIA, also showed good agreement with the reported theoretical prediction.
AB - Electron energy-loss spectroscopy measurements of a hexagonal diamond (h-DIA) were performed using a transmission electron microscope equipped with a monochromator. From the measurements, the dielectric function of h-DIA was derived using Kramers-Kronig analysis (KKA) for the first time. The results of KKA showed that the band gap energy of h-DIA was 4.2 eV, which is 1.3 eV smaller than that of a cubic diamond (c-DIA). The peak energies that appeared in the imaginary part of the dielectric function were assigned to the interband transition energies predicted by theoretical calculations. The K-shell excitation spectrum of h-DIA, which was apparently different from that of c-DIA, also showed good agreement with the reported theoretical prediction.
KW - Band structure
KW - Dielectric properties
KW - Electron energy-loss spectroscopy
KW - Hexagonal diamond
KW - Optical properties
UR - http://www.scopus.com/inward/record.url?scp=84857670810&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857670810&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2012.02.013
DO - 10.1016/j.diamond.2012.02.013
M3 - Article
AN - SCOPUS:84857670810
SN - 0925-9635
VL - 25
SP - 40
EP - 44
JO - Diamond and Related Materials
JF - Diamond and Related Materials
ER -