Experimental Realization of a Quantum Pentagonal Lattice

Geometric frustration, in which competing interactions give rise to degenerate ground states, potentially induces various exotic quantum phenomena in magnetic materials. Minimal models comprising triangular units, such as triangular and Kagome lattices, have been investigated for decades to realize...

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Main Authors:	Yamaguchi, Hironori, Okubo, Tsuyoshi, Kittaka, Shunichiro, Sakakibara, Toshiro, Araki, Koji, Iwase, Kenji, Amaya, Naoki, Ono, Toshio, Hosokoshi, Yuko
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606929/

id	pubmed-4606929
recordtype	oai_dc
spelling	pubmed-46069292015-10-28 Experimental Realization of a Quantum Pentagonal Lattice Yamaguchi, Hironori Okubo, Tsuyoshi Kittaka, Shunichiro Sakakibara, Toshiro Araki, Koji Iwase, Kenji Amaya, Naoki Ono, Toshio Hosokoshi, Yuko Article Geometric frustration, in which competing interactions give rise to degenerate ground states, potentially induces various exotic quantum phenomena in magnetic materials. Minimal models comprising triangular units, such as triangular and Kagome lattices, have been investigated for decades to realize novel quantum phases, such as quantum spin liquid. A pentagon is the second-minimal elementary unit for geometric frustration. The realization of such systems is expected to provide a distinct platform for studying frustrated magnetism. Here, we present a spin-1/2 quantum pentagonal lattice in the new organic radical crystal α-2,6-Cl2-V [=α-3-(2,6-dichlorophenyl)-1,5-diphenylverdazyl]. Its unique molecular arrangement allows the formation of a partially corner-shared pentagonal lattice (PCPL). We find a clear 1/3 magnetization plateau and an anomalous change in magnetization in the vicinity of the saturation field, which originate from frustrated interactions in the PCPL. Nature Publishing Group 2015-10-15 /pmc/articles/PMC4606929/ /pubmed/26468930 http://dx.doi.org/10.1038/srep15327 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Yamaguchi, Hironori Okubo, Tsuyoshi Kittaka, Shunichiro Sakakibara, Toshiro Araki, Koji Iwase, Kenji Amaya, Naoki Ono, Toshio Hosokoshi, Yuko
spellingShingle	Yamaguchi, Hironori Okubo, Tsuyoshi Kittaka, Shunichiro Sakakibara, Toshiro Araki, Koji Iwase, Kenji Amaya, Naoki Ono, Toshio Hosokoshi, Yuko Experimental Realization of a Quantum Pentagonal Lattice
author_facet	Yamaguchi, Hironori Okubo, Tsuyoshi Kittaka, Shunichiro Sakakibara, Toshiro Araki, Koji Iwase, Kenji Amaya, Naoki Ono, Toshio Hosokoshi, Yuko
author_sort	Yamaguchi, Hironori
title	Experimental Realization of a Quantum Pentagonal Lattice
title_short	Experimental Realization of a Quantum Pentagonal Lattice
title_full	Experimental Realization of a Quantum Pentagonal Lattice
title_fullStr	Experimental Realization of a Quantum Pentagonal Lattice
title_full_unstemmed	Experimental Realization of a Quantum Pentagonal Lattice
title_sort	experimental realization of a quantum pentagonal lattice
description	Geometric frustration, in which competing interactions give rise to degenerate ground states, potentially induces various exotic quantum phenomena in magnetic materials. Minimal models comprising triangular units, such as triangular and Kagome lattices, have been investigated for decades to realize novel quantum phases, such as quantum spin liquid. A pentagon is the second-minimal elementary unit for geometric frustration. The realization of such systems is expected to provide a distinct platform for studying frustrated magnetism. Here, we present a spin-1/2 quantum pentagonal lattice in the new organic radical crystal α-2,6-Cl2-V [=α-3-(2,6-dichlorophenyl)-1,5-diphenylverdazyl]. Its unique molecular arrangement allows the formation of a partially corner-shared pentagonal lattice (PCPL). We find a clear 1/3 magnetization plateau and an anomalous change in magnetization in the vicinity of the saturation field, which originate from frustrated interactions in the PCPL.
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606929/
_version_	1613488610699378688

Experimental Realization of a Quantum Pentagonal Lattice

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