التفاصيل البيبلوغرافية
العنوان: |
Variation of Pressure-Induced Valence Transition with Approximation Degree in Yb-Based Quasicrystalline Approximants. |
المؤلفون: |
Keiichiro Imura, Yuki Yoneyama, Hideyuki Ando, Noriyuki Kabeya, Hitoshi Yamaoka, Nozomu Hiraoka, Hirofumi Ishii, Tsutomu Ishimasa, Sato, Noriaki K. |
المصدر: |
Journal of the Physical Society of Japan; 9/15/2023, Vol. 92 Issue 9, p1-4, 4p |
مستخلص: |
We have synthesised new Tsai-type Yb-based intermediate-valence approximant crystals (ACs) with different degrees of approximation to quasicrystals, Zn–Au–Yb 1=1 and 2=1 ACs, and investigated the external pressure effect on their Yb mean-valence ν. While 1=1 AC distinctly exhibits a first-order transition-like jump in ν at a transition pressure Pv, the 2=1 AC only exhibits an indistinct anomaly at Pv. We have also investigated the pressure dependence of the ν of the Au– Al–Yb 1=1 AC, which is a prototypal AC exhibiting pressure-induced quantum criticality. It shows a continuous valence anomaly at the critical pressure Pc, where magnetic susceptibility diverges toward zero temperature, in contrast to the valence jump in the Zn–Au–Yb 1=1 AC. These results are discussed based on a theoretical model of quantum critical valence fluctuation. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of the Physical Society of Japan is the property of Physical Society of Japan and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Complementary Index |