Seminarium Oddziału Badań Magnetyków

Effect of pressure on the heavy-electronic states in Ce_1-xR_xAl₂ and quantum critical phenomena

dr Masashi Ohashi

Uniwersytet w Kanazawie w Japonii

Seminarium odbędzie się zdalnie w aplikacji Microsoft Teams. W celu wzięcia udziału w wydarzeniu należy dołączyć do zespołu Seminarium OBM.Można do niego dołączyć na stałe przy użyciu kodu dostępu ol7omod (dotyczy to osób posiadających konto w domenie intibs.pl, pozostałe osoby proszę o kontakt z prof. dr. hab.Adamem Pikulem, prof. INTiBS PAN ())

Streszczenie:

Physical properties of materials on the border of magnetic instability are strongly dependent on external parameters such as external pressure, magnetic fields, and chemical composition. The heavy fermion (HF) compounds, which are a group of Kondo compounds that have extremely large specific heat coefficients, are typical examples having unstable electronic states, and it is well known that their physical properties are affected strongly by a change of magnetic field and external pressure. In this talk I will present characteristic electronic properties of typical HF compounds, CeAl2 and related compounds, such as quantum critical phenomena observed under high pressure.
References
[1] H. Miyagawa et al., Phys. Rev. B 78, 064403 (2008) “Electronic states of single crystal CeAl2 near the pressure-induced quantum critical point”
[2] M. Ohashi et al., Journal of Physical Society of Japan 83, 024701 (2014) “Thermal and magnetic properties in Ce1-xErxAl2 intermetallic compounds”,
[3] S. Tateno et al., Journal of Physics: Conference Series, 950, 042030 (2017) “Pressure induced structural phase transition in CeAl2”
[4] M. Ohashi et al., Journal of Physical Society of Japan 89, 074708 (2020) “Effect of pressure on the electrical resistivity of Ce1-xErxAl2 spin glass”