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Related Experiment Videos

Continuous quantum phase transition in a Kndo lattice model.

Jian-Xin Zhu1, D R Grempel, Qimiao Si

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Physical Review Letters
|November 13, 2003
PubMed
Summary

This study investigates magnetic quantum phase transitions in anisotropic Kondo lattice models. Researchers found finite-temperature transitions are first-order, while zero-temperature transitions are continuous and locally critical.

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Area of Science:

  • Condensed matter physics
  • Quantum magnetism

Background:

  • Kondo lattice models exhibit complex magnetic behaviors due to competing interactions.
  • Understanding magnetic quantum phase transitions is crucial for materials science.

Purpose of the Study:

  • To investigate the magnetic quantum phase transition in an anisotropic Kondo lattice model.
  • To analyze the interplay between RKKY and Kondo interactions.

Main Methods:

  • Utilized an extended dynamic mean field theory (DMFT) for both antiferromagnetic and paramagnetic phases.
  • Employed quantum Monte Carlo (QMC) simulations to reach temperatures as low as 1% of the Kondo scale.

Main Results:

  • Finite-temperature magnetic transitions are first-order for strong RKKY interactions.

Related Experiment Videos

  • Extrapolated zero-temperature magnetic transitions are continuous and locally critical.

    • Conclusions:

    • The study provides insights into the nature of magnetic transitions in anisotropic Kondo lattice systems.
    • The findings contribute to the understanding of quantum criticality in correlated electron systems.