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Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
The crystal structure of the excitonic insulator Ta(2)NiSe(5) has been investigated under a range of pressures, as determined by the complementary analysis of both single-crystal and powder synchrotron X-ray diffraction measurements. The monoclinic ambient-pressure excitonic insulator phase II trans...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5947720/ https://www.ncbi.nlm.nih.gov/pubmed/29765605 http://dx.doi.org/10.1107/S2052252517018334 |
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author | Nakano, Akitoshi Sugawara, Kento Tamura, Shinya Katayama, Naoyuki Matsubayashi, Kazuyuki Okada, Taku Uwatoko, Yoshiya Munakata, Kouji Nakao, Akiko Sagayama, Hajime Kumai, Reiji Sugimoto, Kunihisa Maejima, Naoyuki Machida, Akihiko Watanuki, Tetsu Sawa, Hiroshi |
author_facet | Nakano, Akitoshi Sugawara, Kento Tamura, Shinya Katayama, Naoyuki Matsubayashi, Kazuyuki Okada, Taku Uwatoko, Yoshiya Munakata, Kouji Nakao, Akiko Sagayama, Hajime Kumai, Reiji Sugimoto, Kunihisa Maejima, Naoyuki Machida, Akihiko Watanuki, Tetsu Sawa, Hiroshi |
author_sort | Nakano, Akitoshi |
collection | PubMed |
description | The crystal structure of the excitonic insulator Ta(2)NiSe(5) has been investigated under a range of pressures, as determined by the complementary analysis of both single-crystal and powder synchrotron X-ray diffraction measurements. The monoclinic ambient-pressure excitonic insulator phase II transforms upon warming or under a modest pressure to give the semiconducting C-centred orthorhombic phase I. At higher pressures (i.e. >3 GPa), transformation to the primitive orthorhombic semimetal phase III occurs. This transformation from phase I to phase III is a pressure-induced first-order phase transition, which takes place through coherent sliding between weakly coupled layers. This structural phase transition is significantly influenced by Coulombic interactions in the geometric arrangement between interlayer Se ions. Furthermore, upon cooling, phase III transforms into the monoclinic phase IV, which is analogous to the excitonic insulator phase II. Finally, the excitonic interactions appear to be retained despite the observed layer sliding transition. |
format | Online Article Text |
id | pubmed-5947720 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-59477202018-05-15 Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5) Nakano, Akitoshi Sugawara, Kento Tamura, Shinya Katayama, Naoyuki Matsubayashi, Kazuyuki Okada, Taku Uwatoko, Yoshiya Munakata, Kouji Nakao, Akiko Sagayama, Hajime Kumai, Reiji Sugimoto, Kunihisa Maejima, Naoyuki Machida, Akihiko Watanuki, Tetsu Sawa, Hiroshi IUCrJ Research Papers The crystal structure of the excitonic insulator Ta(2)NiSe(5) has been investigated under a range of pressures, as determined by the complementary analysis of both single-crystal and powder synchrotron X-ray diffraction measurements. The monoclinic ambient-pressure excitonic insulator phase II transforms upon warming or under a modest pressure to give the semiconducting C-centred orthorhombic phase I. At higher pressures (i.e. >3 GPa), transformation to the primitive orthorhombic semimetal phase III occurs. This transformation from phase I to phase III is a pressure-induced first-order phase transition, which takes place through coherent sliding between weakly coupled layers. This structural phase transition is significantly influenced by Coulombic interactions in the geometric arrangement between interlayer Se ions. Furthermore, upon cooling, phase III transforms into the monoclinic phase IV, which is analogous to the excitonic insulator phase II. Finally, the excitonic interactions appear to be retained despite the observed layer sliding transition. International Union of Crystallography 2018-01-26 /pmc/articles/PMC5947720/ /pubmed/29765605 http://dx.doi.org/10.1107/S2052252517018334 Text en © Akitoshi Nakano et al. 2018 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/2.0/uk/ |
spellingShingle | Research Papers Nakano, Akitoshi Sugawara, Kento Tamura, Shinya Katayama, Naoyuki Matsubayashi, Kazuyuki Okada, Taku Uwatoko, Yoshiya Munakata, Kouji Nakao, Akiko Sagayama, Hajime Kumai, Reiji Sugimoto, Kunihisa Maejima, Naoyuki Machida, Akihiko Watanuki, Tetsu Sawa, Hiroshi Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5) |
title | Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
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title_full | Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
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title_fullStr | Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
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title_full_unstemmed | Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
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title_short | Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta(2)NiSe(5)
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title_sort | pressure-induced coherent sliding-layer transition in the excitonic insulator ta(2)nise(5) |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5947720/ https://www.ncbi.nlm.nih.gov/pubmed/29765605 http://dx.doi.org/10.1107/S2052252517018334 |
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