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[ISSP Colloquiums]
Coherence and Crystal Fields in Ce-based heavy Fermions
Title : Coherence and Crystal Fields in Ce-based heavy Fermions
Date :
Time :
4:00 PM - 5:00 PM 
Place : Lecture Room (A632), 6th Floor, ISSP   
Lecturer : Prof. Zachary Fisk
Affiliation : Department of Astronomy and Physics, University of California Irvine, Irvine CA
Summary : The establishment of coherent Bloch states in heavy Fermion materials involves entangling the f-spin degrees of freedom with those of the conduction electrons with corresponding change in the Fermi surface. Coherence only develops when excited crystal field levels become depopulated in heavy Fermions, intermediate valent materials belonging to a different regime of f-electron - conduction electron coupling. Kondo insulators are argued to be a particular instance of coherent behavior, with data from La3Bi4Pt3 - Ce3Bi4Pt3 alloys showing how coherence develops only at high Ce concentration.

Contact : Takeo Kato , Minoru Yamashita