6533b82efe1ef96bd12927c9
RESEARCH PRODUCT
Quasiparticles and quantum phase transition in universal low-temperature properties of heavy-fermion metals
Vladimir A. StephanovichAlfred Z. MsezaneVasily R. ShaginyanVasily R. ShaginyanE. V. Kirichenkosubject
Condensed Matter::Quantum GasesPhysicsQuantum phase transitionStrongly Correlated Electrons (cond-mat.str-el)Condensed matter physicsCondensed Matter - SuperconductivityCondensationFOS: Physical sciencesGeneral Physics and AstronomyFermionSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsQuantum critical pointHeavy fermionQuasiparticleCondensed Matter::Strongly Correlated ElectronsElectronic systemsPhase diagramdescription
We 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 above quasiparticles form so-called fermion-condensate state, achieved by a fermion condensation quantum phase transition (FCQPT). When a heavy fermion liquid undergoes FCQPT, the fluctuations accompanying 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 above substance provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi liquid behavior.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-10-03 | Europhysics Letters (EPL) |