Quantum criticality in a one-dimensional Ising-anisotropic Kondo lattice model

ORAL

Abstract

Heavy-fermion systems have recently emerged as a playground to study quantum critical points. Here we investigate a modified Kondo lattice model in one-dimension with an additional Ising-type interaction between the localized spins. The Ising-type interaction between local moments plays the role to induce the magnetic order, and drive a magnetic phase transition from Kondo insulator phase to magnetic ordered phase. We first identify the magnetic phase transition as a continuous type. The evolution of the dynamical susceptibility across the critical point is then numerically studied by density-matrix renormalization group. We also compare our results with the locally critical point scenario governed by the Kondo breakdown picture.

*This work was supported by DOE National Nuclear Security Administration through Los Alamos National Laboratory LDRD Program.

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Presenters

  • Wei Zhu

    • Los Alamos National Laboratory
    • LOS ALAMOS NATIONAL LABORATORY

Authors

  • Wei Zhu

    • Los Alamos National Laboratory
    • LOS ALAMOS NATIONAL LABORATORY

  • Jian-Xin Zhu

    • Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Theoretical Division
    • Theoretical Division, Los Alamos National Laboratory
    • Los Alamos Natl Lab