Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6

Abstract Geometrical frustration among interacting spins combined with strong quantum fluctuations destabilize long-range magnetic order in favor of more exotic states such as spin liquids. By following this guiding principle, a number of spin liquid candidate systems were identified in quasi-two-di...

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Autores principales:	Christian Thurn, Paul Eibisch, Arif Ata, Maximilian Winkler, Peter Lunkenheimer, István Kézsmárki, Ulrich Tutsch, Yohei Saito, Steffi Hartmann, Jan Zimmermann, Abanoub R. N. Hanna, A. T. M. Nazmul Islam, Shravani Chillal, Bella Lake, Bernd Wolf, Michael Lang
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/75b46d2188c14aacb487bb3ebc1d7d23
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spelling	oai:doaj.org-article:75b46d2188c14aacb487bb3ebc1d7d232021-11-21T12:41:48ZSpin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O610.1038/s41535-021-00395-62397-4648https://doaj.org/article/75b46d2188c14aacb487bb3ebc1d7d232021-11-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00395-6https://doaj.org/toc/2397-4648Abstract Geometrical frustration among interacting spins combined with strong quantum fluctuations destabilize long-range magnetic order in favor of more exotic states such as spin liquids. By following this guiding principle, a number of spin liquid candidate systems were identified in quasi-two-dimensional (quasi-2D) systems. For 3D, however, the situation is less favorable as quantum fluctuations are reduced and competing states become more relevant. Here we report a comprehensive study of thermodynamic, magnetic and dielectric properties on single crystalline and pressed-powder samples of PbCuTe2O6, a candidate material for a 3D frustrated quantum spin liquid featuring a hyperkagome lattice. Whereas the low-temperature properties of the powder samples are consistent with the recently proposed quantum spin liquid state, an even more exotic behavior is revealed for the single crystals. These crystals show ferroelectric order at T FE ≈ 1 K, accompanied by strong lattice distortions, and a modified magnetic response—still consistent with a quantum spin liquid—but with clear indications for quantum critical behavior.Christian ThurnPaul EibischArif AtaMaximilian WinklerPeter LunkenheimerIstván KézsmárkiUlrich TutschYohei SaitoSteffi HartmannJan ZimmermannAbanoub R. N. HannaA. T. M. Nazmul IslamShravani ChillalBella LakeBernd WolfMichael LangNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (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 Christian Thurn Paul Eibisch Arif Ata Maximilian Winkler Peter Lunkenheimer István Kézsmárki Ulrich Tutsch Yohei Saito Steffi Hartmann Jan Zimmermann Abanoub R. N. Hanna A. T. M. Nazmul Islam Shravani Chillal Bella Lake Bernd Wolf Michael Lang Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
description	Abstract Geometrical frustration among interacting spins combined with strong quantum fluctuations destabilize long-range magnetic order in favor of more exotic states such as spin liquids. By following this guiding principle, a number of spin liquid candidate systems were identified in quasi-two-dimensional (quasi-2D) systems. For 3D, however, the situation is less favorable as quantum fluctuations are reduced and competing states become more relevant. Here we report a comprehensive study of thermodynamic, magnetic and dielectric properties on single crystalline and pressed-powder samples of PbCuTe2O6, a candidate material for a 3D frustrated quantum spin liquid featuring a hyperkagome lattice. Whereas the low-temperature properties of the powder samples are consistent with the recently proposed quantum spin liquid state, an even more exotic behavior is revealed for the single crystals. These crystals show ferroelectric order at T FE ≈ 1 K, accompanied by strong lattice distortions, and a modified magnetic response—still consistent with a quantum spin liquid—but with clear indications for quantum critical behavior.
format	article
author	Christian Thurn Paul Eibisch Arif Ata Maximilian Winkler Peter Lunkenheimer István Kézsmárki Ulrich Tutsch Yohei Saito Steffi Hartmann Jan Zimmermann Abanoub R. N. Hanna A. T. M. Nazmul Islam Shravani Chillal Bella Lake Bernd Wolf Michael Lang
author_facet	Christian Thurn Paul Eibisch Arif Ata Maximilian Winkler Peter Lunkenheimer István Kézsmárki Ulrich Tutsch Yohei Saito Steffi Hartmann Jan Zimmermann Abanoub R. N. Hanna A. T. M. Nazmul Islam Shravani Chillal Bella Lake Bernd Wolf Michael Lang
author_sort	Christian Thurn
title	Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
title_short	Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
title_full	Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
title_fullStr	Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
title_full_unstemmed	Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6
title_sort	spin liquid and ferroelectricity close to a quantum critical point in pbcute2o6
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/75b46d2188c14aacb487bb3ebc1d7d23
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Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe2O6

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