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] |
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| قاعدة البيانات: |
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