249 citations · 1.1k across the 47 of their papers we have counts for
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Metamagnetic jump in the spin-1/2 antiferromagnetic Heisenberg model on the square-kagome lattice
Yasumasa Hasegawa, Hiroki Nakano, Toru Sakai
The magnetization process of the spin-1/2 antiferromagnetic Heisenberg model on two-dimensional square-kagome lattice is studied theoretically. The metamagnetic jumps exist in the…
Spin-Flop Phenomenon of Two-Dimensional Frustrated Antiferromagnets without Anisotropy in Spin Space
Hiroki Nakano, Toru Sakai, Yasumasa Hasegawa
Motivated by a recent finding of a spin-flop phenomenon in a system without anisotropy in spin space reported in the S=1/2 Heisenberg antiferromagnet on the square-kagome lattice,…
Effects of Electron Correlation near Spin-Density-Wave on Angle Dependence of Magnetoconductivity
Hirono Kaneyasu, Keita Kishigi, Yasumasa Hasegawa
The effect of electron correlation on the angle dependence of magnetoconductivity is studied in quasi-one-dimensional organic conductors. We investigated the effect on the basis of…
Magic angle effects of the one-dimensional axis conductivity in quasi-one dimensional conductors
Yasumasa Hasegawa, Hirono Kaneyasu, Keita Kishigi
In quasi-one-dimensional conductors, the conductivity in both one-dimensional axis and interchain direction shows peaks when magnetic field is tilted at the magic angles in the pla…
Field-Induced gap due to four-spin exchange in a spin ladder
Atsushi Nakasu, Keisuke Totsuka, Yasumasa Hasegawa +2
The effect of the four-spin cyclic exchange interaction at each plaquette in the two-leg spin ladder is investigated at T=0, especially focusing on the field-induced gap. T…
Comment on "Magnetic Breakdown at High Fields: Semiclassical and Quantum Treatments"
Keita Kishigi, Yasumasa Hasegawa
We comment on the study of the spin-damping factor on the de Haas-van Alphen (dHvA) discussed by Han et al. (Phys. Rev. Lett. 85, 1500 (2000)).