43 citations · 182 across the 11 of their papers we have counts for
11 papers
Degenerate Soft Modes and Selective Condensation in BaAlO via Inelastic X-ray Scattering
Yui Ishii, Arisa Yamamoto, Alfred Q. R. Baron +2
BaAlO is a ferroelectric material that exhibits structural quantum criticality through chemical composition tuning. Although theoretical calculations and several diffractio…
Impact of in-plane disorders on the thermal conductivity of AgCrSe
Shota Izumi, Yui Ishii, Jinfeng Zhu +5
Superionic conductors have recently attracted renewed attention for their use as thermoelectric materials due to their extremely low lattice thermal conductivity. Of central intere…
Superconductivity enhanced by abundant low-energy phonons in (SrCa)RhSn
Yasuhiro Terasaki, Ratsuki Yamaguchi, Yui Ishii +3
The effects of structural quantum criticality on the strong-coupling superconductivity of (SrCa)RhSn have been investigated via electrical resistivity an…
Lorentz microscopy and small-angle electron diffraction study of magnetic textures in LaSrMnO (0.15 0.30): the role of magnetic anisotropy
A. Kotani, H. Nakajima, K. Harada +2
Magnetic textures in the ferromagnetic phases of LaSrMnO for 0.15 0.30 have been investigated by Lorentz microscopy combined with small-angle electron diffr…
Field-temperature phase diagram of magnetic bubbles spanning chargeorbital ordered and metallic phases in LaSrMnO ()
A. Kotani, H. Nakajima, K. Harada +2
We report formation of magnetic textures in the ferromagnetic (FM) phase of LaSrMnO for 0.125; these textures are magnetic bubbles, magnetic stripe domains, a…
Formation mechanisms of magnetic bubbles in an M-type hexaferrite: the role of chirality reversals at domain walls
H. Nakajima, A. Kotani, K. Harada +2
We examined the formation mechanisms of magnetic bubbles in an M-type hexaferrite via Lorentz microscopy. When magnetic fields were perpendicularly applied to a thin sample of BaFe…
Foucault imaging and small-angle electron diffraction in controlled external magnetic fields
Hiroshi Nakajima, Atsuhiro Kotani, Ken Harada +2
We report a method for acquiring Foucault images and small-angle electron diffraction patterns in external magnetic fields using a conventional transmission electron microscope wit…
Glass-like features of crystalline solids in the quantum critical regime
Y. Ishii, Y. Ouchi, S. Kawaguchi +3
There has been growing interest in structural quantum phase transitions and quantum fluctuations of phonons in the research area of condensed matter physics. Here, we report the ob…
Giant Thermal Vibrations in the Framework Compounds Ba1-xSrxAl2O4
S. Kawaguchi, Y. Ishii, E. Tanaka +3
Synchrotron X-ray diffraction (XRD) experiments were performed on the network compounds Ba1-xSrxAl2O4 at temperatures between 15 and 800 K. The ferroelectric phase of the parent Ba…
An Unconventional Phase Transition in BaAl2O4 Driven by Two Competing Soft Modes
Y. Ishii, S. Mori, Y. Nakahira +4
We investigated the temperature dependence of the superlattice intensity and thermal diffuse scattering intensity of BaAl2O4, which has a network structure with corner-sharing AlO4…
YCr6Ge6 as a Candidate Compound for a Kagome Metal
Yui Ishii, Hisatomo Harima, Yoshihiko Okamoto +2
We show that YCr6Ge6, comprising a kagome lattice made up of Cr atoms, is a plausible candidate compound for a kagome metal that is expected to exhibit anomalous phenomena such as…