V. R. Shaginyan et al 2006 Europhys. Lett. 76 898 doi:10.1209/epl/i2006-10346-7
V. R. Shaginyan1,2, A. Z. Msezane2, V. A. Stephanovich3 and E. V. Kirichenko3
Show affiliationsWe demonstrate, that the main universal features of the low-temperature experimental H-T phase diagram of CeCoIn5 and other heavy-fermion metals can be well explained using Landau paradigm of quasiparticles. The main point of our theory is that the above quasiparticles form the so-called fermion-condensate state, achieved by a fermion condensation quantum phase transition (FCQPT). When a heavy-fermion liquid undergoes FCQPT, the fluctuations accompanying the above quantum critical point are strongly suppressed and cannot destroy the quasiparticles. The comparison of our theoretical results with experimental data on CeCoIn5 have shown that the electronic system of the above substance provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi–liquid behavior.
71.27.+a Strongly correlated electron systems; heavy fermions
Issue 5 (December 2006)
Received 31 August 2006, accepted for publication 3 October 2006, in final form 3 October 2006
Published 1 November 2006
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