Quantum Valence Criticality in Heavy Fermions on Periodic and Aperiodic Crystals
Abstract
Progress of theories and experiments of the quantum valence criticality is overviewed focusing on recent discoveries of direct evidence of the quantum critical point of the valence transition in the periodic crystal α -YbAl1-xFexB4 at x = 0.014 and the quasicrystal Yb15(Al1-xGax)34(Au1-yCuy)51 at x = y = 0. The common quantum criticality as well as T/B scaling behavior in the magnetization observed in the periodic crystal β -YbAlB4 and the quasicrystal Yb15Al34Au51 is shown to be explained by the theory of critical Yb-valence fluctuations starting from the Hamiltonians for describing the low-energy electronic states in both systems.
- Publication:
-
International Conference on Strongly Correlated Electron Systems (SCES2019)
- Pub Date:
- 2020
- DOI:
- 10.7566/JPSCP.30.011023
- arXiv:
- arXiv:1910.10349
- Bibcode:
- 2020sces.confa1023W
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- 12 pages, 4 figures, proceedings of SCES2019 conference