Journal of the Physical Society of Japan 82(12) 2013年12月
Spin scalar chiral ordering gives rise to nontrivial topological characters and peculiar transport properties. Here, we examine how quantum spin fluctuations affect the spin scalar chiral ordering in itinerant electron systems. We consider the Kon...
We show the existence of invariant energy levels in a Kondo lattice model on<br />
an isolated complete graph, such as a triangle and a tetrahedron. These energy<br />
levels always have fixed eigenenergies , irrespective of the<br />
c...
An effective Ising model for the spin-ice type Kondo lattice model is<br />
investigated by the classical Monte Carlo simulation. We clarify the magnetic<br />
phase diagram with four phases: ice-ferro, ice-(0,0,2\pi), 32-sublattice, and<br />
all...
We study the anomalous Hall effect due to noncoplanar magnetism on a pyrochlore structure. We focus on the frustration-induced spatial inhomogeneity of different magnetic low-temperature regimes, between which one can efficiently tune using an ext...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 81(11) 2012年11月
A phase diagram of a spin-ice type Kondo lattice model, potentially relevant to metallic pyrochlore oxides, is obtained by the Monte Carlo simulation implementing the polynomial expansion technique up to a system size with 2048 sites. We identifie...
We study the collective behavior of Majorana modes in the vortex state of chiral p-wave superconductors. Away from the isolated vortex limit, the zero-energy Majorana states communicate with each other on a vortex lattice, and form a coherent band...
人文科学研究科
理学部