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16 papers · 1 filter
Magnetization Plateaus in the Shastry-Sutherland Model for SrCu_2(BO_3)_2: Results of Fourth-Order Perturbation Expansion with a Low-Density Approximation
Yoshiyuki Fukumoto
Magnetization plateaus in the Shastry-Sutherland model for are studied by the perturbation expansion method. The fourth-order effective Hamiltonian which des…
Cantor Spectra for Double Exchange Model
Atsuo Satou, Masanori Yamanaka
We numerically study energy spectra and localization properties of the double exchange model at irrational filling factor. To obtain variational ground state, we use a mumerical te…
Double Kicker system in ATF
T. Imai, K. Nakai, H. Hayano +2
A double kicker system which extracts the ultra-low emittance multi-bunch beam stably from ATF damping ring was developed. The performance of the system was studied comparing an or…
Detecting Gapless Excitations above Ferromagnetic Domain Walls
Tohru Koma, Masanori Yamanaka
In a two or three dimensional ferromagnetic XXZ model, a low energy excitation mode above a magnetic domain wall is gapless, whereas all of the usual spin wave excitations moving a…
Metal-to-Insulator Crossover in the Low-Temperature Normal State of Bi_{2}Sr_{2-x}La_{x}CuO_{6+δ}
S. Ono, Yoichi Ando, T. Murayama +3
We measure the normal-state in-plane resistivity of La-doped Bi-2201 single crystals at low temperatures by suppressing superconductivity with 60-T pulsed magnetic fields. With dec…
NMR and Neutron Scattering Studies of Quasi One-Dimensional Magnet CuV_2O_6
Jun Kikuchi, Kazuhiro Ishiguchi, Kiyoichiro Motoya +4
Magnetic properties of a quasi one-dimensional magnet CuV_2O_6 have been studied by means of susceptibility measurement, NMR and powder neutron diffraction. Cu^{2+} spins (S=1/2) o…