51 citations · 140 across the 10 of their papers we have counts for
18 papers · 1 filter
Theory of Fractionally-magnetized Quantum Ferromagnet
Isao Maruyama, Shin Miyahara
We present a theory to realize entangled quantum spin states with fractional magnetization. The origin of magnetization reduction is partly emergent antiferromagnetism, that is, sp…
Theory of absorption in a frustrated spin gap system
Shin Miyahara
We achieve a comprehensive understanding of the magnetic excitations observed by electric spin resonance and far-infrared spectroscopy in a frustrated spin gap system ${\rm SrCu_2(…
Direct coupling of ferromagnetic moment and ferroelectric polarization in BiFeO
Shiro Kawachi, Shin Miyahara, Toshimitsu Ito +4
The spin-driven component of electric polarization in a single crystal of multiferroic BiFeO was experimentally investigated in pulsed high magnetic fields up to 41 T. Sequen…
Fractionally quantized Berry phases of magnetization plateaux in spin- Heisenberg multimer chains
Isao Maruyama, Shin Miyahara
We study the fractionally quantized Berry phase, , to characterize local -mer spin structures at magnetization pl…
Raman scattering due to a one-magnon excitation process in
S. Miyahara, K. Takubo, T. Suzuki +2
Unconventional peak structure in the Raman spectra due to magnon excitation at low temperature is observed in spinel magnet , where a noncollinear spin state is rea…
Theory of electric field induced one-magnon resonance in cycloidal spin magnets
S. Miyahara, N. Furukawa
We propose a new mechanism to induce a novel one-magnon excitation by the electric component of light in cycloidal spin states, i.e. so called electromagnon process. We calculated…