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Title: Anisotropic Exchange within Decoupled Tetrahedra in the Quantum Breathing Pyrochlore Ba 3 Yb 2 Zn 5 O 11

Abstract

The low energy spin excitation spectrum of the breathing pyrochlore Ba 3 Yb 2 Zn 5 O 11 has been investigated with inelastic neutron scattering. Several nearly resolution limited modes with no observable dispersion are observed at 250 mK while, at elevated temperatures, transitions between excited levels become visible. To gain deeper insight, a theoretical model of isolated Yb3+ tetrahedra parametrized by four anisotropic exchange constants is constructed. The model reproduces the inelastic neutron scattering data, specific heat, and magnetic susceptibility with high fidelity. The fitted exchange parameters reveal a Heisenberg antiferromagnet with a very large Dzyaloshinskii-Moriya interaction. Ultimately, using this model, we predict the appearance of an unusual octupolar paramagnet at low temperatures and speculate on the development of inter-tetrahedron correlations.

Authors:
 [1];  [2];  [3];  [4];  [2];  [2];  [5];  [5];  [2];  [2];  [6];  [4]
  1. Univ. of Waterloo, ON (Canada)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division; Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
  6. Univ. of Waterloo, ON (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1260086
Alternate Identifier(s):
OSTI ID: 1259338
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Rau, J. G., Wu, L. S., May, A. F., Poudel, L., Winn, B., Garlea, V. O., Huq, A., Whitfield, P., Taylor, A. E., Lumsden, M. D., Gingras, M. J. P., and Christianson, A. D.. Anisotropic Exchange within Decoupled Tetrahedra in the Quantum Breathing Pyrochlore Ba3Yb2Zn5O11. United States: N. p., 2016. Web. https://doi.org/10.1103/PhysRevLett.116.257204.
Rau, J. G., Wu, L. S., May, A. F., Poudel, L., Winn, B., Garlea, V. O., Huq, A., Whitfield, P., Taylor, A. E., Lumsden, M. D., Gingras, M. J. P., & Christianson, A. D.. Anisotropic Exchange within Decoupled Tetrahedra in the Quantum Breathing Pyrochlore Ba3Yb2Zn5O11. United States. https://doi.org/10.1103/PhysRevLett.116.257204
Rau, J. G., Wu, L. S., May, A. F., Poudel, L., Winn, B., Garlea, V. O., Huq, A., Whitfield, P., Taylor, A. E., Lumsden, M. D., Gingras, M. J. P., and Christianson, A. D.. Fri . "Anisotropic Exchange within Decoupled Tetrahedra in the Quantum Breathing Pyrochlore Ba3Yb2Zn5O11". United States. https://doi.org/10.1103/PhysRevLett.116.257204. https://www.osti.gov/servlets/purl/1260086.
@article{osti_1260086,
title = {Anisotropic Exchange within Decoupled Tetrahedra in the Quantum Breathing Pyrochlore Ba3Yb2Zn5O11},
author = {Rau, J. G. and Wu, L. S. and May, A. F. and Poudel, L. and Winn, B. and Garlea, V. O. and Huq, A. and Whitfield, P. and Taylor, A. E. and Lumsden, M. D. and Gingras, M. J. P. and Christianson, A. D.},
abstractNote = {The low energy spin excitation spectrum of the breathing pyrochlore Ba3Yb2Zn5O11 has been investigated with inelastic neutron scattering. Several nearly resolution limited modes with no observable dispersion are observed at 250 mK while, at elevated temperatures, transitions between excited levels become visible. To gain deeper insight, a theoretical model of isolated Yb3+ tetrahedra parametrized by four anisotropic exchange constants is constructed. The model reproduces the inelastic neutron scattering data, specific heat, and magnetic susceptibility with high fidelity. The fitted exchange parameters reveal a Heisenberg antiferromagnet with a very large Dzyaloshinskii-Moriya interaction. Ultimately, using this model, we predict the appearance of an unusual octupolar paramagnet at low temperatures and speculate on the development of inter-tetrahedron correlations.},
doi = {10.1103/PhysRevLett.116.257204},
journal = {Physical Review Letters},
number = 25,
volume = 116,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 11 works
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Kapellasite: A Kagome Quantum Spin Liquid with Competing Interactions
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Quadrupolar Phases of the S = 1 Bilinear-Biquadratic Heisenberg Model on the Triangular Lattice
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Dynamically Induced Frustration as a Route to a Quantum Spin Ice State in Tb 2 Ti 2 O 7 via Virtual Crystal Field Excitations and Quantum Many-Body Effects
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Quantum Melting of Spin Ice: Emergent Cooperative Quadrupole and Chirality
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Quantum Excitations in Quantum Spin Ice
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Quantum spin configurations in Tb 2 Ti 2 O 7
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Order by Quantum Disorder in Er 2 Ti 2 O 7
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Quantum Order by Disorder and Accidental Soft Mode in Er 2 Ti 2 O 7
journal, August 2012


Ground state phase diagram of generic X Y pyrochlore magnets with quantum fluctuations
journal, October 2013


Order by virtual crystal field fluctuations in pyrochlore XY antiferromagnets
journal, May 2016


Phase transitions, partial disorder and multi- k structures in Gd 2 Ti 2 O 7
journal, July 2004


Cooperative Paramagnetism in the Geometrically Frustrated Pyrochlore Antiferromagnet Tb 2 Ti 2 O 7
journal, February 1999


Lightly stuffed pyrochlore structure of single-crystalline Yb 2 Ti 2 O 7 grown by the optical floating zone technique
journal, November 2012


Long-range order and spin-liquid states of polycrystalline Tb 2 + x Ti 2 x O 7 + y
journal, February 2013


Composite Spin and Quadrupole Wave in the Ordered Phase of Tb 2+x Ti 2-x O 7+y
journal, June 2015


Rods of Neutron Scattering Intensity in Yb 2 Ti 2 O 7 : Compelling Evidence for Significant Anisotropic Exchange in a Magnetic Pyrochlore Oxide
journal, May 2011


Vindication of Yb 2 Ti 2 O 7 as a Model Exchange Quantum Spin Ice
journal, August 2012


Phase transition and thermal order-by-disorder in the pyrochlore antiferromagnet Er 2 Ti 2 O 7 : A high-temperature series expansion study
journal, December 2013


Spin dynamics in the presence of competing ferromagnetic and antiferromagnetic correlations in Yb 2 Ti 2 O 7
journal, August 2015


Experimental realization of a quantum breathing pyrochlore antiferromagnet
journal, August 2014


Crystal Field Excitations in the Breathing Pyrochlore Antiferromagnet Ba 3 Yb 2 Zn 5 O 11
journal, March 2016

  • Haku, Tendai; Soda, Minoru; Sera, Masakazu
  • Journal of the Physical Society of Japan, Vol. 85, Issue 3
  • DOI: 10.7566/JPSJ.85.034721

Breathing Pyrochlore Lattice Realized in A -Site Ordered Spinel Oxides LiGaCr 4 O 8 and LiInCr 4 O 8
journal, February 2013


Novel Phase Transitions in the Breathing Pyrochlore Lattice: Li NMR 7 on LiInCr 4 O 8 and LiGaCr 4 O 8
journal, November 2014


Magnetic Phase Diagram of the Breathing Pyrochlore Antiferromagnet LiGa 1− x In x Cr 4 O 8
journal, April 2015

  • Okamoto, Yoshihiko; Nilsen, Gøran J.; Nakazono, Taishi
  • Journal of the Physical Society of Japan, Vol. 84, Issue 4
  • DOI: 10.7566/JPSJ.84.043707

Ground State Selection and Spin-Liquid Behaviour in the Classical Heisenberg Model on the Breathing Pyrochlore Lattice
journal, October 2015

  • Benton, Owen; Shannon, Nic
  • Journal of the Physical Society of Japan, Vol. 84, Issue 10
  • DOI: 10.7566/JPSJ.84.104710

Antiferromagnetic Quantum Spins on the Pyrochlore Lattice
journal, March 2001

  • Tsunetsugu, Hirokazu
  • Journal of the Physical Society of Japan, Vol. 70, Issue 3
  • DOI: 10.1143/JPSJ.70.640

Spin-singlet order in a pyrochlore antiferromagnet
journal, December 2001


Weak antiferromagnetism and dimer order in quantum systems of coupled tetrahedra
journal, December 2004


Dzyaloshinsky-Moriya-induced order in the spin-liquid phase of the S = 1 2 pyrochlore antiferromagnet
journal, July 2005


Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993


Magnitude of quantum effects in classical spin ices
journal, October 2015


Quantum Spin Ices and Topological Phases from Dipolar-Octupolar Doublets on the Pyrochlore Lattice
journal, April 2014


Ising-like order by disorder in the pyrochlore antiferromagnet with Dzyaloshinskii-Moriya interactions
journal, December 2008


Low-energy excitations and ground-state selection in the quantum breathing pyrochlore antiferromagnet Ba 3 Yb 2 Zn 5 O 11
journal, June 2016


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