Hiroki
KOBAYASHI

Publication List

* indicates the corresponding author

2024

Co-authored research paper

Hydrogen bond symmetrisation in D2O ice observed by neutron diffraction

Nature Communications (2024)

Kazuki Komatsu*, Takanori Hattori, Stefan Klotz*, Shinichi Machida, Keishiro Yamashita, Hayate Ito, Hiroki Kobayashi, Tetsuo Irifune, Toru Shinmei, Asami Sano-Furukawa, and Hiroyuki Kagi.

Co-authored research paper

High-pressure and high-temperature Raman spectroscopic study of zircon as a pressure scale in hydrothermal DACs

Journal of Raman Spectroscopy (2024)

Naoko Takahashi*, Hiroki Kobayashi, and Hiroyuki Kagi.

2023

Corresponding-author research paper

Slightly Hydrogen-Ordered State of Ice IV Evidenced by In-Situ Neutron Diffraction

The Journal of Physical Chemistry Letters (2023)

Hiroki Kobayashi*, Kazuki Komatsu, Hayate Ito, Shinichi Machida, Takanori Hattori, and Hiroyuki Kagi.

Many ice polymorphs comprise a hydrogen disorder-order pair, but a metastable high-p phase ice IV lacks its hydrogen-ordered counterpart. Here, we report crystallographic evidence for weak hydrogen ordering in DCl-doped ice IV upon cooling for the first time based on in-situ neutron diffraction observations. We have gotten the tail of a new ice - but we also think that our sample suffered from large kinetic effects that hampers the structural transformation at low temperatures. More ordered samples are needed to finally declare the discovery of a new phase.