Hole-Doping Effects on a Two-dimensional Kondo Insulator

Abstract

We study the effects of hole doping on the two-dimensional Heisenberg-Kondo model around the quantum critical point, where the spin liquid phase (Kondo insulator) and the magnetically ordered phase are separated via a second-order phase transition. By means of the self-consistent Born approximation within the bond operator formalism as well as the standard spin wave theory, we discuss dynamical properties of a doped hole. It is clarified that a quasi-particle state stabilized in the spin liquid phase is gradually obscured as the system approaches the quantum critical point. This is also the case for the magnetically ordered phase. We argue the similarity and the difference between these two cases.

8 pages, 14 figures

References in corpus (11)

• Spin-ladders with spin gaps: A description of a class of cuprates
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model
• Theories of non-Fermi liquid behavior in heavy fermions
• Quantum Critical Behavior in Kondo Systems
• Bond operator mean field theory of the half filled Kondo lattice model
• Phase Transitions in the Symmetric Kondo Lattice Model in Two and Three Dimensions
• Critical phenomena near the antiferromagnetic quantum critical point of Heavy-Fermions
• Phase Transitions in Bilayer Heisenberg Model with General Couplings
• Single-hole dynamics in dimerized and frustrated spin-chains
• The two-leg t-J ladder: A mean-field description

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• Magnetic properties of a Kondo insulator with RKKY interaction: Extended dynamical mean field study
• Casimir effect mechanism of pairing between fermions in the vicinity of a magnetic quantum critical point
• Impurity-induced magnetization in three dimensional antiferromagnet at quantum critical point
• Hole Dynamics in the Orthogonal-Dimer Spin System