Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7
Abstract
A “supercooled” liquid develops when a fluid does not crystallize upon cooling below its ordering temperature. Instead, the microscopic relaxation times diverge so rapidly that, upon further cooling, equilibration eventually becomes impossible and glass formation occurs. Classic supercooled liquids exhibit specific identifiers including microscopic relaxation times diverging on a Vogel–Tammann–Fulcher (VTF) trajectory, a Havriliak–Negami (HN) form for the dielectric function ε(ω,T), and a general Kohlrausch–Williams–Watts (KWW) form for time-domain relaxation. Recently, the pyrochlore Dy2Ti2O7 has become of interest because its frustrated magnetic interactions may, in theory, lead to highly exotic magnetic fluids. However, its true magnetic state at low temperatures has proven very difficult to identify unambiguously. Here, we introduce high-precision, boundary-free magnetization transport techniques based upon toroidal geometries and gain an improved understanding of the time- and frequency-dependent magnetization dynamics of Dy2Ti2O7. We demonstrate a virtually universal HN form for the magnetic susceptibility χ(ω,T), a general KWW form for the real-time magnetic relaxation, and a divergence of the microscopic magnetic relaxation rates with the VTF trajectory. Low-temperature Dy2Ti2O7 therefore exhibits the characteristics of a supercooled magnetic liquid. Lastly, one implication is that this translationally invariant lattice of strongly correlated spins may be evolving toward an unprecedented magnetic glass state,more »
- Authors:
-
- Cornell Univ., Ithaca, NY (United States)
- Cornell Univ., Ithaca, NY (United States); Stanford Univ., Palo Alto, CA (United States)
- McMaster Univ., Hamilton, ON (Canada)
- McMaster Univ., Hamilton, ON (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)
- Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of St. Andrews, Fife (United Kingdom)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1261641
- Grant/Contract Number:
- GBMF4544
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 28; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; spin liquid; supercooled liquids; magnetic dynamics; periodic boundaries
Citation Formats
Kassner, Ethan R., Eyvazov, Azar B., Pichler, Benjamin, Munsie, Timothy J. S., Dabkowska, Hanna A., Luke, Graeme M., and Davis, J. C. Seamus. Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7. United States: N. p., 2015.
Web. doi:10.1073/pnas.1511006112.
Kassner, Ethan R., Eyvazov, Azar B., Pichler, Benjamin, Munsie, Timothy J. S., Dabkowska, Hanna A., Luke, Graeme M., & Davis, J. C. Seamus. Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7. United States. https://doi.org/10.1073/pnas.1511006112
Kassner, Ethan R., Eyvazov, Azar B., Pichler, Benjamin, Munsie, Timothy J. S., Dabkowska, Hanna A., Luke, Graeme M., and Davis, J. C. Seamus. Tue .
"Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7". United States. https://doi.org/10.1073/pnas.1511006112. https://www.osti.gov/servlets/purl/1261641.
@article{osti_1261641,
title = {Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7},
author = {Kassner, Ethan R. and Eyvazov, Azar B. and Pichler, Benjamin and Munsie, Timothy J. S. and Dabkowska, Hanna A. and Luke, Graeme M. and Davis, J. C. Seamus},
abstractNote = {A “supercooled” liquid develops when a fluid does not crystallize upon cooling below its ordering temperature. Instead, the microscopic relaxation times diverge so rapidly that, upon further cooling, equilibration eventually becomes impossible and glass formation occurs. Classic supercooled liquids exhibit specific identifiers including microscopic relaxation times diverging on a Vogel–Tammann–Fulcher (VTF) trajectory, a Havriliak–Negami (HN) form for the dielectric function ε(ω,T), and a general Kohlrausch–Williams–Watts (KWW) form for time-domain relaxation. Recently, the pyrochlore Dy2Ti2O7 has become of interest because its frustrated magnetic interactions may, in theory, lead to highly exotic magnetic fluids. However, its true magnetic state at low temperatures has proven very difficult to identify unambiguously. Here, we introduce high-precision, boundary-free magnetization transport techniques based upon toroidal geometries and gain an improved understanding of the time- and frequency-dependent magnetization dynamics of Dy2Ti2O7. We demonstrate a virtually universal HN form for the magnetic susceptibility χ(ω,T), a general KWW form for the real-time magnetic relaxation, and a divergence of the microscopic magnetic relaxation rates with the VTF trajectory. Low-temperature Dy2Ti2O7 therefore exhibits the characteristics of a supercooled magnetic liquid. Lastly, one implication is that this translationally invariant lattice of strongly correlated spins may be evolving toward an unprecedented magnetic glass state, perhaps due to many-body localization of spin.},
doi = {10.1073/pnas.1511006112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 28,
volume = 112,
place = {United States},
year = {Tue Jun 30 00:00:00 EDT 2015},
month = {Tue Jun 30 00:00:00 EDT 2015}
}
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