Loop Liquid in an Ising-Spin Kondo Lattice Model on a Kagome Lattice

Abstract

Phase diagram of an Ising-spin Kondo lattice model on a kagome lattice is investigated by a Monte Carlo simulation. We find that the system exhibits a peculiar ferrimagnetic state at a finite temperature, in which each triangle is in a two-up one-down spin configuration but the spin correlation does not develop any superstructure. We call this state the loop liquid, as it is characterized by the emergent degree of freedom, self-avoiding up-spin loops. We elucidate that the system shows phase transitions from the loop liquid to ferrimagnetically ordered states and a crossover to a partially ferromagnetic state by changing the electron density and temperature. These can be viewed as crystallization and cohesion of the loops, respectively. We demonstrate that the loop formation is observed in the optical conductivity as a characteristic resonant peak.

5 pages, 4 figures, accepted for publication in Rapid Communication section of Phys. Rev. B

References in corpus (6)

• Non-Kondo mechanism for resistivity minimum in spin ice conduction systems
• Quantum Anomalous Hall Effect in Kagome Ice
• Electronic transport in the Coulomb phase of the pyrochlore spin ice
• Thermally-induced Phases in an Ising Kondo Lattice Model on a Triangular Lattice: Partial Disorder and Kosterlitz-Thouless State
• Itinerant electrons in the Coulomb phase
• Metal-insulator transition caused by the coupling to localized charge-frustrated systems under ice-rule local constraint

Cited by in corpus (8)

• Quantum Monte Carlo Simulation of Frustrated Kondo Lattice Models
• Clustering of Topological Charges in a Kagome Classical Spin Liquid
• Noncollinear magnetic ordering in a frustrated magnet: Metallic regime and the role of frustration
• Exotic magnetic phases in an Ising-spin Kondo lattice model on a kagome lattice
• Noncollinear magnetic ordering in the Shastry-Sutherland Kondo lattice model: Insulating regime and the role of Dzyaloshinskii-Moriya interaction
• Phase Diagram of the Shastry-Sutherland Kondo Lattice Model with Classical Localized Spins: A Variational Calculation Study
• Topological Hall effect in the Shastry-Sutherland lattice
• Bosonic Peierls state emerging from the one-dimensional Ising-Kondo interaction