148 citations · 645 across the 14 of their papers we have counts for
14 papers
Exact non-magnetic ground state and residual entropy of S = 1/2 Heisenberg diamond spin lattices
K. Morita, N. Shibata
Exactly solvable frustrated quantum spin models consisting of a diamond unit structure are presented. The ground states are characterized by tetramer-dimer states with a macroscopi…
Spin-Orbit Interaction Enhanced Fractional Quantum Hall States in the Second Landau Level
T. Ito, K. Nomura, N. Shibata
We study the fractional quantum Hall effect at filling fractions 7/3 and 5/2 in the presence of the spin-orbit interaction, using the exact diagonalization method and the density m…
Ground state phase diagram of 2D electrons in high magnetic field
Naokazu Shibata, Daijiro Yoshioka
The ground state phase diagram of two-dimensional electrons in high magnetic field is studied by the density matrix renormalization group (DMRG) method. The low energy excitations…
Ground State Phase Diagram of 2D Electrons in High Magnetic Field
N. Shibata, D. Yoshioka
The ground state of 2D electrons in high magnetic field is studied by the density matrix renormalization group method. The ground state energy, excitation gap, and pair correlation…
Thermodynamic Properties of the S=1/2 Heisenberg Chain with Staggered Dzyaloshinsky-Moriya Interaction
N. Shibata, K. Ueda
Thermodynamic properties of the S=1/2 Heisenberg chain in transverse staggered magnetic field H^y_s and uniform magnetic field H^x perpendicular to the staggered field is studied b…
Ground state phase diagram of 2D electrons in a high Landau level: - DMRG study
N. Shibata, D. Yoshioka
The ground state phase diagram of 2D electrons in a high Landau level (index N=2) is studied by the density matrix renormalization group method. Pair correlation functions are syst…