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9 papers · 1 filter
A pentaquark model for Lambda(1405)
Takahi Inoue
We study a pentaquark model of the negative parity hyperon Lambda(1405). We choose a specific quark configuration for trial, and use the perturbative chiral quark model extended to…
Perelman's Invariant, Ricci Flow, and the Yamabe Invariants of Smooth Manifolds
Kazuo Akutagawa, Masashi Ishida, Claude LeBrun
In his study of Ricci flow, Perelman introduced a smooth-manifold invariant called lambda-bar. We show here that, for completely elementary reasons, this invariant simply equals th…
Internal magnetic field effect on magnetoelectricity in orthorhombic crystals
K. Noda, M. Akaki, F. Nakamura +2
We have investigated the role of the 4 moment on the magnetoelectric (ME) effect of orthorhombic MnO (=rare earth ions). In order to clarify the role of the 4 mom…
Impurity-induced magnetic order in the mixture of two spin gap systems (CH3)2CHNH3CuCl3 and (CH3)2CHNH3CuBr3
Keishi Kanada, Takehiro Saito, Akira Oosawa +3
The ground state of the solid solution of the two spin gap systems (CH3)2CHNH3CuCl3 and (CH3)2CHNH3CuBr3 has been investigated by 1H-NMR. The existence of a magnetic ordering in th…
Cu-NMR study on the disordered quantum spin magnet with the Bose-glass ground state
T. Fujiwara, H. Inoue, A. Oosawa +9
Cu-NMR study has been performed on the disordered spin-gap system Tl1-xKxCuCl3 In the high-field H > HC=Δ/μ_B, where Δis the spin-gap, the hyperfine field becomes extremely inhomog…
Mesoscopic Hall effect driven by chiral spin order
Jun-ichiro Ohe, Tomi Ohtsuki, Bernhard Kramer
A Hall effect due to spin chirality in mesoscopic systems is predicted. We consider a 4-terminal Hall system including local spins with geometry of a vortex domain wall, where stro…