Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate

Condensed Matter Physics: Charge density wave occurs in the two dimensional limit Charge density wave (CDW), a wave-like charge modulation, occurs in tri-, bi- and mono-layer crystals. A team led by Satoshi Tanda at Hokkaido University and collaborators at AIST in Japan observed CDWs in mono-, bi-,...

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Autores principales:	Daiki Sakabe, Zheng Liu, Kazutomo Suenaga, Keiji Nakatsugawa, Satoshi Tanda
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/38eb589bdab848fabcd96b38abb2bf18
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spelling	oai:doaj.org-article:38eb589bdab848fabcd96b38abb2bf182021-12-02T13:41:46ZDirect observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate10.1038/s41535-017-0025-82397-4648https://doaj.org/article/38eb589bdab848fabcd96b38abb2bf182017-04-01T00:00:00Zhttps://doi.org/10.1038/s41535-017-0025-8https://doaj.org/toc/2397-4648Condensed Matter Physics: Charge density wave occurs in the two dimensional limit Charge density wave (CDW), a wave-like charge modulation, occurs in tri-, bi- and mono-layer crystals. A team led by Satoshi Tanda at Hokkaido University and collaborators at AIST in Japan observed CDWs in mono-, bi-, and tri-layer 1T-TaS2 crystal without a substrate using a low voltage scanning transmission electron microscope. The CDW in a mono-layer sample does not exhibit a topological phase with vortex type point defects, which had been previously anticipated from a two-dimensional model. Instead, new topological CDW phases with intra-layer line defects are observed in mono-layer and bi-layer samples, suggesting a significant role of strong electron-phonon interaction in thinned samples. (In tri-layer, commensurate CDW phase without defects was observed.) These results shed a light to understand the stripe type structures in high temperature superconductors and call for new understandings in a pure material to the two dimensional limit. (141 words)Daiki SakabeZheng LiuKazutomo SuenagaKeiji NakatsugawaSatoshi TandaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 2, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Daiki Sakabe Zheng Liu Kazutomo Suenaga Keiji Nakatsugawa Satoshi Tanda Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
description	Condensed Matter Physics: Charge density wave occurs in the two dimensional limit Charge density wave (CDW), a wave-like charge modulation, occurs in tri-, bi- and mono-layer crystals. A team led by Satoshi Tanda at Hokkaido University and collaborators at AIST in Japan observed CDWs in mono-, bi-, and tri-layer 1T-TaS2 crystal without a substrate using a low voltage scanning transmission electron microscope. The CDW in a mono-layer sample does not exhibit a topological phase with vortex type point defects, which had been previously anticipated from a two-dimensional model. Instead, new topological CDW phases with intra-layer line defects are observed in mono-layer and bi-layer samples, suggesting a significant role of strong electron-phonon interaction in thinned samples. (In tri-layer, commensurate CDW phase without defects was observed.) These results shed a light to understand the stripe type structures in high temperature superconductors and call for new understandings in a pure material to the two dimensional limit. (141 words)
format	article
author	Daiki Sakabe Zheng Liu Kazutomo Suenaga Keiji Nakatsugawa Satoshi Tanda
author_facet	Daiki Sakabe Zheng Liu Kazutomo Suenaga Keiji Nakatsugawa Satoshi Tanda
author_sort	Daiki Sakabe
title	Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
title_short	Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
title_full	Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
title_fullStr	Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
title_full_unstemmed	Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate
title_sort	direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1t-tas2 by transmission electron microscopy without a substrate
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/38eb589bdab848fabcd96b38abb2bf18
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Direct observation of mono-layer, bi-layer, and tri-layer charge density waves in 1T-TaS2 by transmission electron microscopy without a substrate

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