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Condensed Matter > Strongly Correlated Electrons

arXiv:2406.15314 (cond-mat)
[Submitted on 21 Jun 2024]

Title:A Candidate for the Quantum Spin Liquid Ground-State in the Shastry-Sutherland Lattice Material Yb$_2$Be$_2$GeO$_7$

Authors:M. Pula, S. Sharma, J. Gautreau, Sajilesh K. P., A. Kanigel, M. D. Frontzek, T. N. Dolling, L. Clark, S. Dunsiger, A. Ghara, G. M. Luke
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Abstract:The quasi-2D Shastry-Sutherland model has remained topical in the field of condensed matter physics for the last two decades, following the experimental realization of the model in the material SrCu$_2$(BO$_3$)$_2$. Since then, research into the Shastry-Sutherland system has revealed more nuanced physics than initially predicted; recent theoretical works have even predicted a quantum spin liquid phase may exist. Herein, we report on a new Shastry-Sutherland lattice material, Yb$_2$Be$_2$GeO$_7$, of the rare-earth melilite family RE$_2$Be$_2$GeO$_7$. We find, through SQUID magnetometry, powder neutron diffraction, specific heat capacity, and muon spin relaxation, that Yb$_2$Be$_2$GeO$_7$ lacks magnetic order and exhibits persistent spin dynamics to at least 17 mK. We propose the Shastry-Sutherland lattice material Yb$_2$Be$_2$GeO$_7$ as a candidate to host a quantum spin liquid ground-state.
Comments: 11 pages, 7 figures, 4 tables
Subjects: Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:2406.15314 [cond-mat.str-el]
  (or arXiv:2406.15314v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.2406.15314
Related DOI: https://doi.org/10.1103/PhysRevB.110.014412

Submission history

From: Mathew Pula [view email]
[v1] Fri, 21 Jun 2024 17:10:10 UTC (15,850 KB)
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