Observation of Systematic Variation in Yb Ion Valence as a Function of Interatomic Spacing in Icosahedral Approximant Crystals
| Autor: | Shuya Matsukawa, Kazuhiko Deguchi, Minami Hayashi, Noriaki K. Sato, Keiichiro Imura |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Valence (chemistry)
Materials science Condensed matter physics Icosahedral symmetry Alloy General Physics and Astronomy Quasicrystal 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Ion Condensed Matter::Materials Science Criticality 0103 physical sciences engineering 010306 general physics 0210 nano-technology Quantum Atomic spacing |
| Zdroj: | Journal of the Physical Society of Japan. 86(4):043702-043702 |
| ISSN: | 0031-9015 |
| Popis: | We discovered two alloy systems, Pd–Ga–Yb and Pd–Ge–Yb, that belong to the Tsai-type 1/1 approximant to the Au–Al–Yb quasicrystal exhibiting the unusual quantum criticality and show a similar behavior to Kondo lattice systems with a magnetically ordered ground state. Combining the results of other Yb-based approximant crystals, we find that there is a systematic variation in the Yb ion valence vs the lattice constant. This proves that the Au–Al–Yb approximant is located at the border of the valence change, in favor of the idea that the valence fluctuation plays a crucial role in the quantum criticality of the Au–Al–Yb system. |
| Databáze: | OpenAIRE |
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