5 citations · 13 across the 6 of their papers we have counts for
6 papers
Emerging electro-optic molecular crystals for optoelectronic integration
Keishi Sunami, Sachio Horiuchi, Yoriko Sonoda +5
The rapid advancement of communication technology necessitates the development of hybrid optical modulators that integrate silicon photonics with electro-optic (EO) materials to en…
NMR verification of Dirac nodal lines in a single-component molecular conductor
Takahiko Sekine, Keishi Sunami, Takumi Hatamura +6
The Dirac nodal line (DNL) is a novel form of massless Dirac fermions that reside along lines in momentum space. Here, we verify genuine DNLs in the molecular material, [Ni(dmdt)$_…
Experimental Verification of Charge Soliton Excitations in the Ionic Mott-Peierls Ferroelectric, TTF-CA
R. Takehara, H. Adachi, K. Sunami +5
Strong coupling of charge, spin, and lattice in solids brings about emergent elementary excitations with their intertwining and, in one dimension, solitons are known as such. The c…
Enhanced lattice fluctuations prior to a nonmagnetic ferroelectric order in an ionic spin-chain system
Keishi Sunami, Tomohiro Baba, Kazuya Miyagawa +2
We investigated microscopic lattice states in the donor-acceptor ionic Mott insulator, TTF-BA, by Br-NQR spectroscopy to explore cross-correlated fluctuations between spin,…
Magnetic excitations in an ionic spin-chain system with a non-magnetic ferroelectric instability
K. Sunami, Y. Sakai, R. Takehara +4
Cross-correlation between magnetism and dielectric is expected to offer novel emergent phenomena. Here, magnetic excitations in the organic donor-acceptor spin-chain system, TTF-BA…
Fate of a soliton matter upon symmetry-breaking ferroelectric order
K. Sunami, R. Takehara, A. Katougi +6
In a one-dimensional (1D) system with degenerate ground states, their domain boundaries, dubbed solitons, emerge as topological excitations often carrying unconventional charges an…