TY - JOUR
T1 - Evaluation of exchange-correlation effects on the heat-shielding performance of carrier electrons in LaB6using momentum-transfer resolved electron energy-loss spectroscopy
AU - Sato, Yohei K.
AU - Terauchi, Masami
N1 - Funding Information:
The authors are grateful to K. Adachi of Sumitomo Metal Mining Co., Ltd. for providing the LaB6 crystal. This work was partially supported by JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas under No. 21H00089 and the Cooperative Research Program of “Network Joint Research Center for Materials and Devices.” We would like to acknowledge J. Kamoi and M. Ageishi for data acquisition and technical assistance, respectively.
Publisher Copyright:
© 2022 Author(s).
PY - 2022/2/14
Y1 - 2022/2/14
N2 - Exchange-correlation (XC) effects in carrier electrons have a significant influence on the dielectric properties and electric characteristics of a material. In this study, momentum-transfer (q) resolved electron energy-loss spectroscopy was conducted to experimentally evaluate the XC effects of carrier electrons in LaB6 bulk crystals, whose nanoparticles have been used for near-infrared-light shielding filters. By measuring q dependence of plasmon energy due to carrier electrons and evaluating the deviation from the free electron gas model in random phase approximation, the dielectric correction factor due to the XC effects, i.e., the local field correction G(q), for the carrier electrons in LaB6 were experimentally derived. This experimental result confirmed that the XC effects are non-negligible for the carrier electrons in LaB6. Because the XC effects influence dipole surface plasmon energy of LaB6 nanoparticles, the evaluation of the XC effects is important for a precise understanding of the optical properties of LaB6 nanoparticles.
AB - Exchange-correlation (XC) effects in carrier electrons have a significant influence on the dielectric properties and electric characteristics of a material. In this study, momentum-transfer (q) resolved electron energy-loss spectroscopy was conducted to experimentally evaluate the XC effects of carrier electrons in LaB6 bulk crystals, whose nanoparticles have been used for near-infrared-light shielding filters. By measuring q dependence of plasmon energy due to carrier electrons and evaluating the deviation from the free electron gas model in random phase approximation, the dielectric correction factor due to the XC effects, i.e., the local field correction G(q), for the carrier electrons in LaB6 were experimentally derived. This experimental result confirmed that the XC effects are non-negligible for the carrier electrons in LaB6. Because the XC effects influence dipole surface plasmon energy of LaB6 nanoparticles, the evaluation of the XC effects is important for a precise understanding of the optical properties of LaB6 nanoparticles.
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U2 - 10.1063/5.0076692
DO - 10.1063/5.0076692
M3 - Article
AN - SCOPUS:85125091619
SN - 0021-8979
VL - 131
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 6
M1 - 063104
ER -