Gamma5 quasiparticles and avoided quantum criticality in U(Ru,Rh)2Si2

Details Gamma5 quasiparticles and avoided quantum criticality in U(Ru,Rh)2Si2 Gamma5 quasiparticles and avoided quantum criticality in U(Ru,Rh)2Si2

2005-06-15

arxiv.org/abs/cond-mat/0506384v1

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages: paper submitted to SCES'05 in Vienna

Scientific paper

We discuss recent specific heat data in high magnetic fields on URu2Si2 and 4% Rh-doped URu2Si2 as well as previously published de Haas-van Alphen data at lower magnetic fields in pure URu2Si2; both of which are consistent with quasiparticle bands formed from a hybridization between 5f-electron Gamma5 doublets and regular conduction electrons. The system exhibits itinerant electron metamagnetism that gives rise to a putative quantum critical point at \~ 34 -37 T (depending on the % of Rh) that is subsequently unstable to field-induced phases

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