Quasielastic neutron scattering probing H $^{-}$ dynamics in the H $^{-}$ conductors LaH $_{3-2x}$ O $_{x}$

Tamatsukuri, Hiromu ; Fukui, Keiga*; Iimura, Soshi*; Honda, Takashi*; Tada, Tomofumi*; Murakami, Yoichi*; Yamaura, Junichi*; Kuramoto, Yoshio*; Sagayama, Hajime*; Yamada, Takeshi*; Matsuura, Masato*; Shibata, Kaoru ; Kofu, Maiko ; Kawakita, Yukinobu ; Ikeda, Kazutaka*; Otomo, Toshiya; Hosono, Hideo*

A series of oxyhydrides LaH $_{3-2x}$ O $_{x}$ exhibits characteristic high H $^{-}$ conductivity. In this study, we performed the incoherent quasielastic neutron scattering measurements to investigate H $^{-}$ dynamics in LaH $_{3-2x}$ O $_{x}$ . We successfully identify two kinds of microscopic H $^{-}$ dynamics in the end member LaH $_{3}$ ; the jump diffusion and the localized back and forth jump between neighboring tetrahedral and octahedral sites. These dynamics have the common elementary jump process between the Tet and adjacent Oct sites, and become more conspicuous with increasing a concentration of H $^{-}$ . Based on these results, we discuss that the origin of the high H $^{-}$ conductivity in this system is explained by a so-called concerted migration model.

Language	:	English
Journal	:
Volume	:
Number	:
Pages	:
Publication Year/Month	:
Meeting title	:	Advanced Materials Research Grand Meeting (MRM2023/IUMRS-ICA2023)
Held date	:	2023/12
Location (city)	:	Kyoto
Location (country)	:	Japan
Patent information	:
PDF	:
Paper URL	:
DOI for research data	:
Keywords	:	ヒドリド伝導体; 中性子準弾性散乱
Research Facility	:	J-PARC物質・生命科学実験施設
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:
Altmetrics	:

Registration No. : BB20231410
JAEA Abstracts No. :
Paper Submission No. :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Quasielastic neutron scattering probing H dynamics in the H conductors LaHO

Quasielastic neutron scattering probing H $^{-}$ dynamics in the H $^{-}$ conductors LaH $_{3-2x}$ O $_{x}$