Deconfined quantum criticality in the two dimensional Kondo lattice model

Abstract

We investigate the continuous quantum phase transition from an antiferromagnetic metal to a heavy fermion liquid based on the Kondo lattice model in two dimensions. We propose that antiferromagnetic spin fluctuations and conduction electrons fractionalize into neutral bosonic spinons and charged spinless fermions at the quantum critical point. This deconfined quantum criticality leads us to establish a critical field theory in terms of the fractionalized fields interacting via emergent U(1) gauge fields. The critical field theory not only predicts non-Fermi liquid physics near the quantum critical point but also recovers Fermi liquid physics away from the quantum critical point.

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Cited by in corpus (4)

• Deconfinement in the presence of a Fermi surface
• The Kondo-lattice state and non-Fermi-liquid behavior in the presence of Van Hove singularities
• Antiferromagnetic metal to heavy-fermion metal quantum phase transition in the Kondo lattice model: A strong coupling approach
• Competition between superconductivity and charge density waves