6533b85bfe1ef96bd12bbd85
RESEARCH PRODUCT
Quantum critical point in ferromagnet
E. V. KirichenkoVasily R. ShaginyanVladimir A. Stephanovichsubject
Condensed Matter::Quantum GasesQuantum phase transitionPhysicsCondensed matter physicsFermionCondensed Matter PhysicsPower lawElectronic Optical and Magnetic MaterialsMomentumFerromagnetismQuantum critical pointQuasiparticleElectrical and Electronic EngineeringGround statedescription
Abstract The heavy-fermion metal CePd 1 - x Rh x can be tuned from ferromagnetism at x = 0 to non-magnetic state at the critical concentration x c . The non-Fermi liquid behavior at x ≃ x c is recognized by power law dependence of the specific heat C ( T ) given by the electronic contribution, susceptibility χ ( T ) and volume expansion coefficient α ( T ) at low temperatures: C / T ∝ χ ( T ) ∝ α ( T ) / T ∝ 1 / T . We show that this alloy exhibits a universal thermodynamic non-Fermi liquid behavior independent of magnetic ground state. This can be well understood utilizing the quasiparticle picture and the concept of fermion condensation quantum phase transition at the density ρ = p F 3 / 3 π 2 = ρ FC , p F is Fermi momentum.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-04-01 | Physica B: Condensed Matter |