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Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)

Since the discovery of the Verwey transition in magnetite, transition metal compounds with pyrochlore structures have been intensively studied as a platform for realizing remarkable electronic phase transitions. We report on a phase transition that preserves the cubic symmetry of the β-pyrochlore ox...

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Autores principales: Okamoto, Yoshihiko, Amano, Haruki, Katayama, Naoyuki, Sawa, Hiroshi, Niki, Kenta, Mitoka, Rikuto, Harima, Hisatomo, Hasegawa, Takumi, Ogita, Norio, Tanaka, Yu, Takigawa, Masashi, Yokoyama, Yasunori, Takehana, Kanji, Imanaka, Yasutaka, Nakamura, Yuto, Kishida, Hideo, Takenaka, Koshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7305186/
https://www.ncbi.nlm.nih.gov/pubmed/32561729
http://dx.doi.org/10.1038/s41467-020-16873-7
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author Okamoto, Yoshihiko
Amano, Haruki
Katayama, Naoyuki
Sawa, Hiroshi
Niki, Kenta
Mitoka, Rikuto
Harima, Hisatomo
Hasegawa, Takumi
Ogita, Norio
Tanaka, Yu
Takigawa, Masashi
Yokoyama, Yasunori
Takehana, Kanji
Imanaka, Yasutaka
Nakamura, Yuto
Kishida, Hideo
Takenaka, Koshi
author_facet Okamoto, Yoshihiko
Amano, Haruki
Katayama, Naoyuki
Sawa, Hiroshi
Niki, Kenta
Mitoka, Rikuto
Harima, Hisatomo
Hasegawa, Takumi
Ogita, Norio
Tanaka, Yu
Takigawa, Masashi
Yokoyama, Yasunori
Takehana, Kanji
Imanaka, Yasutaka
Nakamura, Yuto
Kishida, Hideo
Takenaka, Koshi
author_sort Okamoto, Yoshihiko
collection PubMed
description Since the discovery of the Verwey transition in magnetite, transition metal compounds with pyrochlore structures have been intensively studied as a platform for realizing remarkable electronic phase transitions. We report on a phase transition that preserves the cubic symmetry of the β-pyrochlore oxide CsW(2)O(6), where each of W 5d electrons are confined in regular-triangle W(3) trimers. This trimer formation represents the self-organization of 5d electrons, which can be resolved into a charge order satisfying the Anderson condition in a nontrivial way, orbital order caused by the distortion of WO(6) octahedra, and the formation of a spin-singlet pair in a regular-triangle trimer. An electronic instability due to the unusual three-dimensional nesting of Fermi surfaces and the strong correlations of the 5d electrons characteristic of the pyrochlore oxides are both likely to play important roles in this charge-orbital-spin coupled phenomenon.
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spelling pubmed-73051862020-06-26 Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6) Okamoto, Yoshihiko Amano, Haruki Katayama, Naoyuki Sawa, Hiroshi Niki, Kenta Mitoka, Rikuto Harima, Hisatomo Hasegawa, Takumi Ogita, Norio Tanaka, Yu Takigawa, Masashi Yokoyama, Yasunori Takehana, Kanji Imanaka, Yasutaka Nakamura, Yuto Kishida, Hideo Takenaka, Koshi Nat Commun Article Since the discovery of the Verwey transition in magnetite, transition metal compounds with pyrochlore structures have been intensively studied as a platform for realizing remarkable electronic phase transitions. We report on a phase transition that preserves the cubic symmetry of the β-pyrochlore oxide CsW(2)O(6), where each of W 5d electrons are confined in regular-triangle W(3) trimers. This trimer formation represents the self-organization of 5d electrons, which can be resolved into a charge order satisfying the Anderson condition in a nontrivial way, orbital order caused by the distortion of WO(6) octahedra, and the formation of a spin-singlet pair in a regular-triangle trimer. An electronic instability due to the unusual three-dimensional nesting of Fermi surfaces and the strong correlations of the 5d electrons characteristic of the pyrochlore oxides are both likely to play important roles in this charge-orbital-spin coupled phenomenon. Nature Publishing Group UK 2020-06-19 /pmc/articles/PMC7305186/ /pubmed/32561729 http://dx.doi.org/10.1038/s41467-020-16873-7 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Okamoto, Yoshihiko
Amano, Haruki
Katayama, Naoyuki
Sawa, Hiroshi
Niki, Kenta
Mitoka, Rikuto
Harima, Hisatomo
Hasegawa, Takumi
Ogita, Norio
Tanaka, Yu
Takigawa, Masashi
Yokoyama, Yasunori
Takehana, Kanji
Imanaka, Yasutaka
Nakamura, Yuto
Kishida, Hideo
Takenaka, Koshi
Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title_full Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title_fullStr Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title_full_unstemmed Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title_short Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW(2)O(6)
title_sort regular-triangle trimer and charge order preserving the anderson condition in the pyrochlore structure of csw(2)o(6)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7305186/
https://www.ncbi.nlm.nih.gov/pubmed/32561729
http://dx.doi.org/10.1038/s41467-020-16873-7
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