Kondo-stabilised spin liquids and heavy fermion superconductivity

The authors consider an SU(2) path integral formulation of a Kondo lattice model for heavy fermions that treats the RKKY interaction explicitly. At low temperatures they find the heavy Fermi liquid becomes unstable to the formation of a spin liquid amongst the f spins. Kondo coupling to the spin liquid stabilises it against antiferromagnetism, causing the resonating valence bonds of the spin liquid to occasionally escape into the conduction sea. This process induces off-diagonal resonant scattering in the conduction sea, thereby generating anisotropic superconductivity in the heavy fermion system.

[1]  Jones,et al.  Mean-field analysis of two antiferromagnetically coupled Anderson impurities. , 1989, Physical review. B, Condensed matter.

[2]  Andrei,et al.  Cooper instability in the presence of a spin liquid. , 1989, Physical review letters.

[3]  Collin,et al.  Abnormal behavior of sound velocity and damping in the vicinity of the smectic-A-smectic-C transition in terephthal-bis-p-p'-butylaniline (TBBA). , 1988, Physical review letters.

[4]  Zou,et al.  SU(2) gauge symmetry of the large-U limit of the Hubbard model. , 1988, Physical review. B, Condensed matter.

[5]  S. Hikami,et al.  MAGNETORESISTANCE OF HIGH TEMPERATURE SUPERCONDUCTORS , 1988 .

[6]  Peters,et al.  Quenching of interacting moments and anomalous Fermi-liquid behavior in disordered Kondo alloys at low temperatures. , 1988, Physical review letters.

[7]  Kotliar,et al.  Resonating valence bonds and d-wave superconductivity. , 1988, Physical review. B, Condensed matter.

[8]  R. Broglia,et al.  Frontiers and borderlines in many-particle physics : Varenna on Lake Como, Villa Monastero, 7-17 July 1987 , 1988 .

[9]  Lee,et al.  Large-orbital-degeneracy expansion for the lattice Anderson model. , 1987, Physical review. B, Condensed matter.

[10]  Lee,et al.  d -wave superconductivity in the large-degeneracy limit of the Anderson lattice. , 1987, Physical review letters.

[11]  Auerbach,et al.  Kondo bosons and the Kondo lattice: Microscopic basis for the heavy Fermi liquid. , 1986, Physical review letters.

[12]  K. Yosida,et al.  Orbital degeneracy effect on the dense Kondo state in real systems , 1985 .

[13]  P. Nozières.  Impuretés magnétiques et effet Kondo , 1985 .

[14]  Y. Nagaoka,et al.  A Model for Cooper Pairing. in Heavy Fermion Superconductor , 1984 .

[15]  P. Fulde,et al.  On the theory of superconductivity in Kondo lattice systems , 1984 .

[16]  J. Drouffe,et al.  Strong coupling and mean field methods in lattice gauge theories , 1983 .

[17]  D. Newns,et al.  On the solution of the Coqblin-Schreiffer Hamiltonian by the large-N expansion technique , 1983 .