Quasiparticles and quantum phase transition in universal low-temperature properties of heavy-fermion metals

Abstract

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.

7 pages, 1 figure. arXiv admin note: substantial text overlap with arXiv:cond-mat/0602602

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• The break up of heavy electrons at a quantum critical point
• Quantum criticality
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Cited by in corpus (13)

• Strongly correlated Fermi-systems: non-Fermi liquid behavior, quasiparticle effective mass and their interplay
• New state of matter: heavy-fermion systems, quantum spin liquids, quasicrystals, cold gases, and high temperature superconductors
• The influence of topological phase transition on the superfluid density of overdoped copper oxides
• Universal low-temperature behavior of the CePd_{1-x}Rh_x ferromagnet
• Energy scales and magnetoresistance at a quantum critical point
• Energy scales and the non-Fermi liquid behavior in YbRh2Si2
• Flat Bands and Enigma of Metamagnetic Quantum Critical Regime in Sr3Ru2O7
• Effect of superconductivity on the shape of flat bands
• Quantum critical point in high-temperature superconductors
• Behavior of the antiferromagnetic phase transition near the fermion condensation quantum phase transition in YbRh2Si2
• Common behavior of the scaled condensation energy for both high-$T_c$ and conventional superconductors
• Universal behavior of $\mathrm{CeP}{\mathrm{d}}_{1-\mathrm{x}}\mathrm{R}{\mathrm{h}}_{\mathrm{x}}$ Ferromagnet at Quantum Critical Point
• Quantum Phase Transition in $\mathrm{CeCoI}{\mathrm{n}}_5$: Experimental Facts and Theory