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Partial Kondo screening in frustrated Kondo lattice systems
Yukitoshi Motome1, Kyoya Nakamikawa, Youhei Yamaji
1Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan.
Physical Review Letters
|September 28, 2010
Summary
Geometrical frustration in Kondo lattice systems creates a novel quantum phase. This phase partially orders, relieving frustration via sublattice magnetic ordering and Kondo screening.
Area of Science:
- Condensed matter physics
- Quantum magnetism
- Strongly correlated electron systems
Background:
- Kondo lattice systems exhibit complex magnetic and electronic behaviors.
- Geometrical frustration significantly impacts magnetic ordering and electronic properties.
- Understanding the interplay between Kondo coupling and RKKY interactions is crucial.
Purpose of the Study:
- To investigate the influence of geometrical frustration on Kondo lattice systems.
- To explore the competition between Kondo coupling and Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions.
- To identify emergent quantum phases under frustrated conditions.
Main Methods:
- Variational Monte Carlo simulations were employed.
- The study focused on Kondo lattice models with geometrical frustration.
- Analysis involved examining magnetic ordering and electronic screening.
Main Results:
- An emergent quantum phase with partial magnetic ordering was discovered.
- Frustration is relieved by forming magnetic order on a sublattice.
- The remaining sites exhibit Kondo screening and spin-singlet formation.
Conclusions:
- Geometrical frustration drives the formation of a unique partially ordered quantum phase.
- This phase highlights a novel mechanism for relieving frustration in correlated electron systems.
- Quantum fluctuations and spin-charge interplay play key roles in this emergent state.
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