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Dynamical Ground State in the XY Pyrochlore Yb2GaSbO7



P. M. Sarte, K. Cruz-Kan, B. R. Ortiz, K. H. Hong, M. M. Bordelon, D. Reig-i-Plessis, M. Lee, E. S. Choi, Matthew Stone, S. Calder, D. M. Pajerowski, L. Mangin-Thro, Yiming Qiu, J. P. Attfield, S. D. Wilson, C. Stock, H. D. Zhou, A. M. Hallas, J. A. Paddison, A. A. Aczel, C. R. Wiebe


The magnetic ground state of the pyrochlore Yb2GaSbO7 has remained an enigma for nearly a decade. The persistent spin fluctuations observed by muon spin relaxation measurements at low temperatures have not been adequately explained for this material using existing theories for quantum magnetism. Here we report on the synthesis and characterisation of Yb2GaSbO7 to elucidate the central physics at play. Through DC and AC magnetic susceptibility, heat capacity, and neutron scattering experiments, we observe evidence for a dynamical ground state that makes Yb2GaSbO7 a promising candidate for disorder-induced spin-liquid or spin-singlet behaviour. This state is quite fragile, being tuned to a splayed ferromagnet in a modest magnetic field υ0Hc approximately} 1.5 T.
Nature Partner Journals Quantum Materials


pyrochlore, disorder-induced spin liquid, neutron scattering


Sarte, P. , Cruz-Kan, K. , Ortiz, B. , Hong, K. , Bordelon, M. , Reig-i-Plessis, D. , Lee, M. , Choi, E. , Stone, M. , Calder, S. , Pajerowski, D. , Mangin-Thro, L. , Qiu, Y. , Attfield, J. , Wilson, S. , Stock, C. , Zhou, H. , Hallas, A. , Paddison, J. , Aczel, A. and Wiebe, C. (2021), Dynamical Ground State in the XY Pyrochlore Yb<sub>2</sub>GaSbO<sub>7</sub>, Nature Partner Journals Quantum Materials (Accessed October 3, 2023)
Created May 4, 2021, Updated September 7, 2021