Quantum criticality and superconducting pairing in Ce(1-x)Yb(x)CoIn5 alloys
arXiv:1411.3368 · doi:10.1088/1742-6596/592/1/012078
Abstract
In this paper we review some of our recent experimental and theoretical results on transport and thermodynamic properties of heavy-fermion alloys Ce(1-x)Yb(x)CoIn5. Charge transport measurements under magnetic field and pressure on these single crystalline alloys revealed that: (i) relatively small Yb substitution suppresses the field induced quantum critical point, with a complete suppression for nominal Yb doping x>0.20; (ii) the superconducting transition temperature Tc and Kondo lattice coherence temperature T* decrease with x, yet they remain finite over the wide range of Yb concentrations; (iii) both Tc and T* increase with pressure; (iv) there are two contributions to resistivity, which show different temperature and pressure dependences, implying that both heavy and light quasiparticles contribute to inelastic scattering. We also analyzed theoretically the pressure dependence of both T* and Tc within the composite pairing theory. In the purely static limit, when we ignore the lattice dynamics, we find that the composite pairing mechanism necessarily causes opposite behaviors of T* and Tc with pressure: if T* grows with pressure, Tc must decrease with pressure and vice versa.
arXiv comment10 pages, 8 figures; invited paper SCES'14
References in corpus (27)
- A Common Thread: the pairing interaction for the unconventional superconductors
- Superconducting phases of f-electron compounds
- The Challenge of Unconventional Superconductivity
- Field-Induced Quantum Critical Point in CeCoIn5
- Superconductivity and Quantum Criticality in CeCoIn_5
- Odd Frequency Pairing in the Kondo Lattice
- Possible Realization of Odd Frequency Pairing in Heavy Fermion Compounds
- Supplementary material to Heavy electrons and the symplectic symmetry of spin
- Heavy electrons and the symplectic symmetry of spin
- Anisotropic superconducting gap in transuranium superconductor PuRhGa: Ga NQR study on a single crystal
- Incoherent non-Fermi liquid scattering in a Kondo lattice
- Towards the identification of a quantum critical line in the (p, B) phase diagram of CeCoIn5
- Effects of La substitution on superconducting state of CeCoIn5
- Superconductivity of Composite Particles in Two-Channel Kondo Lattice
- Co-operative Kondo Effect in the two-channel Kondo Lattice
- Tandem Pairing in Heavy Fermion Superconductors
- Strong magnetic fluctuations in superconducting state of CeCoIn
- Non-Fermi liquid behavior with and without quantum criticality in Ce(1-x)Yb(x)CoIn(5)
- Yb Valence Change in (Ce,Yb)CoIn5 from spectroscopy and bulk properties
- Composite pairing in a mixed valent two channel Anderson model
- Composite Spin-Triplet Superconductivity in an Symmetric Lattice Model
- Breakup of a Stoner model for the 2D ferromagnetic quantum critical point
- Composite spin and orbital triplet superconductivity formed out of a Non-Fermi Liquid phase
- Resolution of the discrepancy between the variation of the physical properties of Ce1-xYbxCoIn5 single crystals and thin films with Yb composition
- From local moment to mixed-valence regime in Ce(1-x)Yb(x)CoIn5 alloys
- Theory for effects of pressure on heavy-fermion alloys
- Correlated disorder in Kondo lattice