تقرير
Probing quantum criticality in ferromagnetic CeRh6Ge4
| العنوان: | Probing quantum criticality in ferromagnetic CeRh6Ge4 |
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| المؤلفون: | Thomas, S. M., Seo, S., Asaba, T., Ronning, F., Rosa, P. F. S., Bauer, E. D., Thompson, J. D. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | CeRh$_6$Ge$_4$ is unusual in that its ferromagnetic transition can be suppressed continuously to zero temperature, i.e., to a ferromagnetic quantum-critical point (QCP), through the application of modest hydrostatic pressure. This discovery has raised the possibility that the ferromagnetic QCP may be of the Kondo-breakdown type characterized by a jump in Fermi volume, to which thermopower S measurements should be sensitive. Though $S/T$ changes both sign and magnitude around the critical pressure P$_{c}\approx{}0.8$ GPa, these changes are not abrupt but extend over a pressure interval from within the ferromagnetic state up to P$_c$. Together with temperature and pressure variations in electrical resistivity and previously reported heat capacity, thermopower results point to the near coincidence of two sequential effects near P$_c$, delocalization of 4f degrees-of-freedom through orbital-selective hybridization followed by quantum criticality of itinerant ferromagnetism. Comment: 6 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.109.L121105 |
| URL الوصول: | http://arxiv.org/abs/2403.07812 |
| رقم الأكسشن: | edsarx.2403.07812 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.109.L121105 |
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