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Title: A Local Quantum Phase Transition in YFe 2Al 10

Here, 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 by a new paradigm in YFe 2Al 10, 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 YFe 2Al 10 is achieved by a new and entirely local type of quantum phase transition that may originate with the creation of the moments themselves.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [2] ;  [4] ;  [5] ;  [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
Publication Date:
Report Number(s):
BNL-205727-2018-JAAM
Journal ID: ISSN 0027--8424
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
PNAS
Additional Journal Information:
Journal Name: PNAS; Journal ID: ISSN 0027--8424
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1440349

Gannon, W J., Zaliznyak, Igor A., Wu, L. S., Tsvelik, A. M., Qiu, Y., Rodriguez-Rivera, J. A., and Aronson, M. C.. A Local Quantum Phase Transition in YFe2Al10. United States: N. p., Web. doi:10.1073/pnas.1721493115.
Gannon, W J., Zaliznyak, Igor A., Wu, L. S., Tsvelik, A. M., Qiu, Y., Rodriguez-Rivera, J. A., & Aronson, M. C.. A Local Quantum Phase Transition in YFe2Al10. United States. doi:10.1073/pnas.1721493115.
Gannon, W J., Zaliznyak, Igor A., Wu, L. S., Tsvelik, A. M., Qiu, Y., Rodriguez-Rivera, J. A., and Aronson, M. C.. 2018. "A Local Quantum Phase Transition in YFe2Al10". United States. doi:10.1073/pnas.1721493115.
@article{osti_1440349,
title = {A Local Quantum Phase Transition in YFe2Al10},
author = {Gannon, W J. and Zaliznyak, Igor A. and Wu, L. S. and Tsvelik, A. M. and Qiu, Y. and Rodriguez-Rivera, J. A. and Aronson, M. C.},
abstractNote = {Here, 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 by a new paradigm 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 a new and entirely local type of quantum phase transition that may originate with the creation of the moments themselves.},
doi = {10.1073/pnas.1721493115},
journal = {PNAS},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {6}
}