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Invariant Energy Levels and Flat Band Engineering in a Kondo Lattice Model on Geometrically Frustrated Lattices
Masafumi Udagawa, Hiroaki Ishizuka, Yukitoshi Motome
We show the existence of invariant energy levels in a Kondo lattice model on an isolated complete graph, such as a triangle and a tetrahedron. These energy levels always have fixed…
Monte Carlo Study of an Effective Ising Model for the Spin-ice type Kondo Lattice Model
Hiroaki Ishizuka, Masafumi Udagawa, Yukitoshi Motome
An effective Ising model for the spin-ice type Kondo lattice model is investigated by the classical Monte Carlo simulation. We clarify the magnetic phase diagram with four phases:…
On the Stability of Quantum Hall Kagome-ice Insulator
Hiroaki Ishizuka, Yukitoshi Motome
The stability of the kagome-ice insulator against the three dimensionality and the canting angle of the spin anisotropy axes is studied numerically using the exact diagonalization…
Spontaneous Spatial Inversion Symmetry Breaking and Spin Hall Effect in a Spin-ice Double-exchange Model on a Pyrochlore Lattice
Hiroaki Ishizuka, Yukitoshi Motome
A formation of tetrahedral spin clusters is discovered by Monte Carlo simulation for a spin-ice type double-exchange model on a pyrochlore lattice. The spin-cluster phase is magnet…
Loop Liquid in an Ising-Spin Kondo Lattice Model on a Kagome Lattice
Hiroaki Ishizuka, Yukitoshi Motome
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…
Polynomial Expansion Monte Carlo Study of Frustrated Itinerant Electron Systems: Application to a Spin-ice type Kondo Lattice Model on a Pyrochlore Lattice
Hiroaki Ishizuka, Masafumi Udagawa, Yukitoshi Motome
We present the benchmark of the polynomial expansion Monte Carlo method to a Kondo lattice model with classical localized spins on a geometrically frustrated lattice. The method en…
Thermally-induced Phases in an Ising Kondo Lattice Model on a Triangular Lattice: Partial Disorder and Kosterlitz-Thouless State
Hiroaki Ishizuka, Yukitoshi Motome
Magnetic and electronic properties of a Kondo lattice model with Ising localized spins are studied on an isotropic triangular lattice. By using Monte Carlo simulation, we present t…