Wednesday, September 5, 2012

1209.0621 (O. Howczak et al.)

From magnetic and Kondo-compensated states to unconventional
superconductivity in heavy fermions: a unified approach
   [PDF]

O. Howczak, J. Kaczmarczyk, J. Spałek
Inspired by the recent experimental evidence of antiferromagnetism and superconductivity coexistence in heavy fermion CeRhIn$_5$, we propose a fully microscopic approach based on the idea of real space pairing within the Anderson-Kondo lattice model. We present an overall phase diagram incorporating the emergence of a quantum critical point, where Kondo insulating (KI), antiferromagnetic (AF) and superconducting (SC) phases meet. We also obtain the Kondo insulating state with totally compensated magnetic moments as the parental state for the emerging SC phases. Furthermore, the coexistent (AF+SC) phase may contain also a non-trivial spin-triplet gap component within the essentially spin-singlet pairing mechanism
View original: http://arxiv.org/abs/1209.0621

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