Search results for "Fermi liquid theory"

showing 3 items of 23 documents

Violation of the Time-Reversal and Particle-Hole Symmetries in Strongly Correlated Fermi Systems: A Review

2020

In this review, we consider the time reversal T and particle-antiparticle C symmetries that, being most fundamental, can be violated at microscopic level by a weak interaction. The notable example here is from condensed matter, where strongly correlated Fermi systems like heavy-fermion metals and high Tc superconductors exhibit C and T symmetries violation due to so-called non-Fermi liquid (NFL) behavior. In these systems, tunneling differential conductivity (or resistivity) is a very sensitive tool to experimentally test the above symmetry break. When a strongly correlated Fermi system turns out to be near the topological fermion condensation quantum phase transition (FCQPT), it exhibits t…

Quantum phase transitionPhysics and Astronomy (miscellaneous)General Mathematicsmedia_common.quotation_subjectquantum phase transition; fermion condensation; tunneling conductivity; time-reversal symmetryWeak interaction01 natural sciencesAsymmetry010305 fluids & plasmastime-reversal symmetryBaryon asymmetry0103 physical sciencesComputer Science (miscellaneous)quantum phase transition010306 general physicstunneling conductivitymedia_commonPhysicsCondensed matter physicslcsh:MathematicsFermionlcsh:QA1-939Symmetry (physics)T-symmetryChemistry (miscellaneous)Computer Science::Programming LanguagesFermi liquid theoryfermion condensationSymmetry-Basel
researchProduct

Magnetic-field-induced reentrance of Fermi-liquid behavior and spin-lattice relaxation rates in

2009

Abstract A strong departure from Landau–Fermi liquid (LFL) behavior have been recently revealed in observed anomalies in both the magnetic susceptibility χ and the muon and 63Cu nuclear spin-lattice relaxation rates 1 / T 1 of YbCu 5 − x Au x ( x = 0.6 ). We show that the above anomalies along with magnetic-field-induced reentrance of LFL properties are indeed determined by the dependence of the quasiparticle effective mass M ∗ on magnetic field B and temperature T and demonstrate that violations of the Korringa law also come from M ∗ ( B , T ) dependence. We obtain this dependence theoretically utilizing our approach based on fermion condensation quantum phase transition (FCQPT) notion. Ou…

Quantum phase transitionPhysicsMagnetoresistanceCondensed matter physicsSpin–lattice relaxationGeneral Physics and Astronomy01 natural sciencesMagnetic susceptibility010305 fluids & plasmasEffective mass (solid-state physics)0103 physical sciencesQuasiparticleStrongly correlated materialFermi liquid theory010306 general physicsPhysics Letters A
researchProduct

Fermi Liquid with Fermion Condensate

2014

Here we discuss the general properties of FCQPT leading to the emergence of FC. We present a microscopic derivation of the main equations of FC, and show that Fermi systems with FC form an entirely new class of Fermi liquids with its own topological structure, protecting the FC state. We construct the phase diagram, and explore the order parameter of these systems. We show that the fermion condensate has a strong impact on the observable physical properties of systems, where it is realized, up to relatively high temperatures of a few tens kelvin. Two different scenarios of the quantum critical point (QCP), a zero-temperature instability of the Landau state, related to the divergence of the …

Quantum phase transitionPhysicsPhase transitionEffective mass (solid-state physics)Condensed matter physicsQuantum critical pointFermi surfaceObservableFermi liquid theoryFermi gas
researchProduct