2024-03-29T09:57:34Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00005519
2023-01-16T05:03:25Z
673:674:675
Thermoelectric properties of Al_{82.6−x}Re_{17.4}Si_x (7≼x≼12) 1/1-cubic approximants
Takeuchi, Tsunehiro
Otagiri, Toshio
Sakagami, Hiroki
Kondo, Takeshi
Mizutani, Uichiro
Sato, Hirokazu
open access
Copyright: American Physical Society, All rights reserved.
The thermoelectric power S(T) and thermal conductivity _k(T) were systematically studied for a series of Al_{82.6−x}Re_{17.4}Si_x(7≼x≼12) 1/1-cubic approximants. We found that S(T) of these approximants is characterized by large magnitude, sign reversal with varying composition, and nonlinear temperature dependence, all of which are also known as characteristics of the corresponding quasicrystals. The calculated S(T) on the basis of the Boltzmann transport formula with accurately determined electronic structure showed extremely good agreement with the measured ones not only in their magnitude but also in the temperature and composition dependence. These results strongly indicate that these characteristic behaviors in S(T) of the approximants and the corresponding quasicrystals are brought about by their characteristic electronic structure, i.e., the presence of a pseudogap across the Fermi level.
The American Physical Society
2004-10-01
eng
journal article
VoR
http://hdl.handle.net/2237/7125
https://nagoya.repo.nii.ac.jp/records/5519
https://doi.org/10.1103/PhysRevB.70.144202
1098-0121
Physical Review B
70
14
144202
144202
https://nagoya.repo.nii.ac.jp/record/5519/files/PhysRevB_70_144202.pdf
application/pdf
111.5 kB
2018-02-19