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Local quantum phase transition in YFe2Al10.
Gannon, W J; Wu, L S; Zaliznyak, I A; Xu, W H; Tsvelik, A M; Qiu, Y; Rodriguez-Rivera, J A; Aronson, M C.
Affiliation
  • Gannon WJ; Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242; wgannon@physics.tamu.edu.
  • Wu LS; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
  • Zaliznyak IA; Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, NY 11973.
  • Xu WH; Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, NY 11973.
  • Tsvelik AM; Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, NY 11973.
  • Qiu Y; National Institute of Standards and Technology Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899.
  • Rodriguez-Rivera JA; National Institute of Standards and Technology Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899.
  • Aronson MC; Department of Materials Science and Engineering, University of Maryland, College Park, MD 20740.
Proc Natl Acad Sci U S A ; 115(27): 6995-6999, 2018 07 03.
Article in En | MEDLINE | ID: mdl-29915042
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 [Formula see text] 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.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Proc Natl Acad Sci U S A Year: 2018 Document type: Article
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PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Proc Natl Acad Sci U S A Year: 2018 Document type: Article