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Type: Artigo de periódico
Title: Vibrational And Electronic Excitations In The (ce,la)m In5 (m=co,rh) Heavy-fermion Family
Author: Martinho H.
Pagliuso P.G.
Fritsch V.
Moreno N.O.
Sarrao J.L.
Rettori C.
Abstract: We present a systematic study at ambient pressure of the phononic and electronic Raman-active excitations in the ab plane of the (Ce,La)M In5 (M=Co,Rh) heavy-fermion family. We found that the characteristic Raman spectra of this family of compounds display two phonon modes at ∼38 and ∼165 cm-1 and a broad electronic background centered at ∼40 cm-1. For CeCoIn5, the temperature dependence of these excitations shows anomalous behavior near T* =45 K that may indicate a nontrivial renormalization of the electronic structure driven by strong correlations between hybridized 4f electrons. © 2007 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.75.045108
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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