[seminar] Today: Alberto Fraile: CeTX3 Heavy Fermions

[Damir Pajic]

Podsjetnik na današnji seminar:

Drage kolegice i kolege,
Drago mi je da mogu najaviti sljedeć‡i Seminar Fizičkog odsjeka:

Dear colleagues,
I would like to invite you to the following Seminar of the Department of 
Physics:

petak/Friday  17.02. u 13.15 h
room F201 (floor II)

CeTX3 Heavy Fermions

Alberto Fraile
Department of Physics, Faculty of Science, University of Zagreb

Ce-based heavy fermion systems, whose electronic ground state properties 
are determined by strongly competing Ruderman-Kittel-Kasuya-Yosida 
(RKKY) and Kondo interactions, have attracted much attention due to 
their intriguing properties (including valence fluctuations (VF), 
heavy-fermion (HF) behavior, and different types of magnetic ordering). 
A wide range of intriguing physical properties have been observed in the 
proximity of a quantum critical point (QCP).
In particular, BaNiSn3-type HF antiferromagnets CeRhSi3, CeCoGe3 and 
CeIrSi3 were reported to become superconductors under pressure [1-3]. 
These discoveries received considerable attention, because BaNiSn3-type 
crystal structure lacks the center symmetry that was considered 
necessary for HF superconductivity [4].
In this talk our inelastic neutron scattering (INS) and muon spin 
rotation (muSR) studies on similar compounds (belonging to the CeTX3 
family, T = transition metal, X = metal) will be presented. Namely, some 
surprises found in CeCuAl3 will be discussed along with the features 
observed in CeAuAl3 (and, in less detail, CeRhSn3 and CeCuGa3).

References:

[1] Kimura N, Ito K, Saitoh K, Umeda Y and Aoki H. 2005 Phys. Rev. Lett. 
95 247004
[2] Sugitani I et al. 2006 J. Phys. Soc. Jpn. 75 043703
[3] Settai R, Sugitani I, Okuda Y, Thamizhavel A, Nakashima M, Onuki Y 
and Harima H. 2007 J. Magn. Magn. Mater. 310 84
[4] Anderson P W. 1984 Phys. Rev. B 30 400


Lijep pozdrav / Best regards
Damir Pajić