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

Authors :
Pula, M.
Sharma, S.
Gautreau, J.
P., Sajilesh K.
Kanigel, A.
Frontzek, M. D.
Dolling, T. N.
Clark, L.
Dunsiger, S.
Ghara, A.
Luke, G. M.
Publication Year :
2024

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.<br />Comment: 11 pages, 7 figures, 4 tables

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2406.15314
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevB.110.014412