Journal of the Physical Society of Japan 87(3) 034706 2018年 [査読有り]
The S = 1=2 triangular-lattice Heisenberg antiferromagnet with distortion is investigated by the numerical-diagonalization method. The examined distortion type is √3 x √3. We study the case when the distortion connects the undistorted triangular l...
Journal of the Physical Society of Japan 87(6) 063706 2018年 [査読有り]
The S = 1=2 triangular- and kagome-lattice Heisenberg antiferromagnets are investigated under a magnetic field using the numerical-diagonalization method. A procedure is proposed to extract data points with very small finite-size deviations using ...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86(11) 114705 2017年11月 [査読有り]
An S = 1/2 triangular-lattice Heisenberg antiferromagnet with next-nearest-neighbor (NNN) interactions is investigated under a magnetic field by the numerical-diagonalization method. It is known that, in both cases of weak and strong NNN interacti...
The S = 1/2 kagome-lattice antiferromagnet is studied using the numerical diagonalization of finite clusters and a finite-size scaling. The susceptibility analysis at the zero magnetization indicates that the system has a gapless spin excitation. ...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86(6) 063702 2017年6月 [査読有り]
The ground state of the spin-1/2 Heisenberg antiferromagnet on a distorted triangular lattice is studied using a numerical-diagonalization method. The network of interactions is the root 3 x root 3 type; the interactions are continuously controlle...