Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6

Abstract In crystalline magnets, interaction randomness is usually thought as a negative factor preventing interesting quantum phenomena to occur. However, intriguing interplay between randomness and quantumness can also leads to unique phenomena in the strongly correlated materials. Among others, t...

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Autores principales:	Yuesheng Li, Qiao-Yi Li, Wei Li, Tao Liu, David J. Voneshen, Pabitra K. Biswas, Devashibhai Adroja
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
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/8a962738b224414c9b9664346c4f0010
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spelling	oai:doaj.org-article:8a962738b224414c9b9664346c4f00102021-12-02T14:23:31ZSpin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO610.1038/s41535-021-00333-62397-4648https://doaj.org/article/8a962738b224414c9b9664346c4f00102021-03-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00333-6https://doaj.org/toc/2397-4648Abstract In crystalline magnets, interaction randomness is usually thought as a negative factor preventing interesting quantum phenomena to occur. However, intriguing interplay between randomness and quantumness can also leads to unique phenomena in the strongly correlated materials. Among others, the random transverse-field Ising spin chain (RTIC) hosts a renowned quantum Griffiths phase. Although the RTIC model has been regarded as a toy model for long, here we materialize this model with the compound PrTiNbO6, which has a disordered ground state with pronounced quantum fluctuations and continuous spin excitations. The observed anomalous spin dynamics of PrTiNbO6 can be accounted by the RTIC model with a consistent set of parameters determined from fitting the thermodynamic data, and it is ascribed to the quantum Griffiths rare regions in the system. Our results provide a concrete example of quantum Griffiths magnet, and offer an ideal experimental platform for investigating the dynamical properties of random many-body system.Yuesheng LiQiao-Yi LiWei LiTao LiuDavid J. VoneshenPabitra K. BiswasDevashibhai AdrojaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-8 (2021)
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 Yuesheng Li Qiao-Yi Li Wei Li Tao Liu David J. Voneshen Pabitra K. Biswas Devashibhai Adroja Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
description	Abstract In crystalline magnets, interaction randomness is usually thought as a negative factor preventing interesting quantum phenomena to occur. However, intriguing interplay between randomness and quantumness can also leads to unique phenomena in the strongly correlated materials. Among others, the random transverse-field Ising spin chain (RTIC) hosts a renowned quantum Griffiths phase. Although the RTIC model has been regarded as a toy model for long, here we materialize this model with the compound PrTiNbO6, which has a disordered ground state with pronounced quantum fluctuations and continuous spin excitations. The observed anomalous spin dynamics of PrTiNbO6 can be accounted by the RTIC model with a consistent set of parameters determined from fitting the thermodynamic data, and it is ascribed to the quantum Griffiths rare regions in the system. Our results provide a concrete example of quantum Griffiths magnet, and offer an ideal experimental platform for investigating the dynamical properties of random many-body system.
format	article
author	Yuesheng Li Qiao-Yi Li Wei Li Tao Liu David J. Voneshen Pabitra K. Biswas Devashibhai Adroja
author_facet	Yuesheng Li Qiao-Yi Li Wei Li Tao Liu David J. Voneshen Pabitra K. Biswas Devashibhai Adroja
author_sort	Yuesheng Li
title	Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
title_short	Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
title_full	Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
title_fullStr	Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
title_full_unstemmed	Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6
title_sort	spin dynamics and griffiths singularity in the random quantum ising magnet prtinbo6
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8a962738b224414c9b9664346c4f0010
work_keys_str_mv	AT yueshengli spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT qiaoyili spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT weili spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT taoliu spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT davidjvoneshen spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT pabitrakbiswas spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6 AT devashibhaiadroja spindynamicsandgriffithssingularityintherandomquantumisingmagnetprtinbo6
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Spin dynamics and Griffiths singularity in the random quantum Ising magnet PrTiNbO6

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