Large-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>N</mml:mi></mml:math> approach to the two-channel Kondo lattice
Ari Wugalter, Yashar Komijani, Piers Coleman
Abstract
The recent discovery of a new class of 1-2-20 praseodymium compounds appears to form a new realization of the two-channel Kondo lattice. In this model, the continuous channel symmetry is spontaneously broken, forming a channel ferromagnet, in which one conduction channel forms a Kondo insulator, while the other remains conducting. This ground state can be understood using the concept of order fractionalization, in which the channel magnetization breaks up into an emergent spinor order parameter. Topological defects in the order parameter carry a U(1) flux. The effective action reveals a phase diagram that contains a nonmagnetic transition between a large and a small Fermi surface.
Topics & Concepts
PhysicsCondensed matter physicsPhase diagramSpinorLattice (music)Kondo insulatorKondo effectTopology (electrical circuits)ElectronPhase (matter)Quantum mechanicsMathematicsCombinatoricsAcousticsRare-earth and actinide compoundsQuantum and electron transport phenomenaPhysics of Superconductivity and Magnetism