Local quantum phase transition in YFe2Al10

W. J. Gannon; L. S. Wu; I. A. Zaliznyak; W. H. Xu; A. M. Tsvelik; Y. Qiu; J. A. Rodriguez-Rivera; M. C. Aronson

doi:10.1073/pnas.1721493115

Local quantum phase transition in YFe₂Al₁₀

W. J. Gannon, L. S. Wu, I. A. Zaliznyak, W. H. Xu, A. M. Tsvelik, Y. Qiu, J. A. Rodriguez-Rivera, M. C. Aronson

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

A phase transition occurs when correlated regions of a new phase grow to span the system and the fluctuations within the correlated regions become long lived. Here, we present neutron scattering measurements showing that this conventional picture must be replaced in YFe₂Al₁₀, a compound that forms naturally very close to a T = 0 quantum phase transition. Fully quantum mechanical fluctuations of localized moments are found to diverge at low energies and temperatures; however, the fluctuating moments are entirely without spatial correlations. Zero temperature order in YFe₂Al₁₀ is achieved by an entirely local type of quantum phase transition that may originate with the creation of the moments themselves.

Original language	English
Pages (from-to)	6995-6999
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	115
Issue number	27
DOIs	https://doi.org/10.1073/pnas.1721493115
State	Published - Jul 3 2018

Bibliographical note

Funding Information:
ACKNOWLEDGMENTS. The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249.

Funding Information:
The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249.

Publisher Copyright:
© 2018 National Academy of Sciences. All Rights Reserved.

Keywords

Magnetism
Neutron scattering
Quantum matter

ASJC Scopus subject areas

General

Access to Document

10.1073/pnas.1721493115

Cite this

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title = "Local quantum phase transition in YFe2Al10 ",

abstract = "A phase transition occurs when correlated regions of a new phase grow to span the system and the fluctuations within the correlated regions become long lived. Here, we present neutron scattering measurements showing that this conventional picture must be replaced in YFe2Al10, a compound that forms naturally very close to a T = 0 quantum phase transition. Fully quantum mechanical fluctuations of localized moments are found to diverge at low energies and temperatures; however, the fluctuating moments are entirely without spatial correlations. Zero temperature order in YFe2Al10 is achieved by an entirely local type of quantum phase transition that may originate with the creation of the moments themselves.",

keywords = "Magnetism, Neutron scattering, Quantum matter",

author = "Gannon, {W. J.} and Wu, {L. S.} and Zaliznyak, {I. A.} and Xu, {W. H.} and Tsvelik, {A. M.} and Y. Qiu and Rodriguez-Rivera, {J. A.} and Aronson, {M. C.}",

note = "Funding Information: ACKNOWLEDGMENTS. The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249. Funding Information: The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249. Publisher Copyright: {\textcopyright} 2018 National Academy of Sciences. All Rights Reserved.",

year = "2018",

month = jul,

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doi = "10.1073/pnas.1721493115",

language = "English",

volume = "115",

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T1 - Local quantum phase transition in YFe2Al10

AU - Gannon, W. J.

AU - Wu, L. S.

AU - Zaliznyak, I. A.

AU - Xu, W. H.

AU - Tsvelik, A. M.

AU - Qiu, Y.

AU - Rodriguez-Rivera, J. A.

AU - Aronson, M. C.

N1 - Funding Information: ACKNOWLEDGMENTS. The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249. Funding Information: The authors acknowledge useful discussions with C. Varma, E. Abrahams, D. MacLaughlin, L. Shu, S. Chakravarty, G. Aeppli, S. Raymond, and C. Broholm. Part of this research was conducted at Brookhaven National Laboratory, where W.J.G., L.S.W., and M.C.A were supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-AC02-98CH1886. I.A.Z., W.H.X., and A.M.T. have been separately supported under the auspices of US Department of Energy, Office of Basic Energy Sciences Contract DE-SC0012704. W.H.X. was supported by the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy under US Department of Energy Grant DE-FOA-0001276. Part of this work was performed at the Aspen Center for Physics, which is supported by National Science Foundation Grant PHY-1066293. Access to the MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement DMR-1508249. Publisher Copyright: © 2018 National Academy of Sciences. All Rights Reserved.

PY - 2018/7/3

Y1 - 2018/7/3

N2 - A phase transition occurs when correlated regions of a new phase grow to span the system and the fluctuations within the correlated regions become long lived. Here, we present neutron scattering measurements showing that this conventional picture must be replaced in YFe2Al10, a compound that forms naturally very close to a T = 0 quantum phase transition. Fully quantum mechanical fluctuations of localized moments are found to diverge at low energies and temperatures; however, the fluctuating moments are entirely without spatial correlations. Zero temperature order in YFe2Al10 is achieved by an entirely local type of quantum phase transition that may originate with the creation of the moments themselves.

AB - A phase transition occurs when correlated regions of a new phase grow to span the system and the fluctuations within the correlated regions become long lived. Here, we present neutron scattering measurements showing that this conventional picture must be replaced in YFe2Al10, a compound that forms naturally very close to a T = 0 quantum phase transition. Fully quantum mechanical fluctuations of localized moments are found to diverge at low energies and temperatures; however, the fluctuating moments are entirely without spatial correlations. Zero temperature order in YFe2Al10 is achieved by an entirely local type of quantum phase transition that may originate with the creation of the moments themselves.

KW - Magnetism

KW - Neutron scattering

KW - Quantum matter

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