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Beyond single tetrahedron physics of the breathing pyrochlore compound Ba3Yb2Zn5O11

Rabindranath Bag1,*, Sachith E. Dissanayake1,*, Han Yan2,3, Zhenzhong Shi1, David Graf4, Eun Sang Choi4, Casey Marjerrison1, Franz Lang5, Tom Lancaster6 et al.

Yiming Qiu7, Wangchun Chen7, Stephen J. Blundell5, Andriy H. Nevidomskyy2, and Sara Haravifard1,8,†

  • 1Department of Physics, Duke University, Durham, North Carolina 27708, USA
  • 2Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
  • 3Rice Academy of Fellows, Rice University, Houston, Texas 77005, USA
  • 4National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310, USA
  • 5Clarendon Laboratory & Physics Department, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
  • 6Department of Physics, Centre for Materials Physics, Durham University, Durham DH1 3LE, United Kingdom
  • 7NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
  • 8Department of Materials Sciences and Mechanical Engineering, Duke University, Durham, North Carolina 27708, USA

  • *These authors contributed equally to this work.
  • †sara.haravifard@duke.edu

Phys. Rev. B 107, L140408 – Published 20 April, 2023

DOI: https://doi.org/10.1103/PhysRevB.107.L140408

Abstract

Recently, a new class of quantum magnets, the so-called breathing pyrochlore spin systems, have attracted much attention due to their potential to host exotic emergent phenomena. Here, we present magnetometry, heat capacity, thermal conductivity, muon-spin relaxation, and polarized inelastic neutron scattering measurements performed on high-quality single crystal samples of the breathing pyrochlore compound Ba3Yb2Zn5O11. We interpret these results using a simplified toy model and provide insight into the low-energy physics of this system beyond the single tetrahedron physics proposed previously.

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