Dynamical Ground State in the XY Pyrochlore Yb2GaSbO7

Published

May 5, 2021

Author(s)

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

Abstract

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 υ₀H_c approximately} 1.5 T.

Citation

Nature Partner Journals Quantum Materials

Volume

6

Issue

1

Pub Type

Journals

Keywords

pyrochlore, disorder-induced spin liquid, neutron scattering

Citation

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 Yb₂GaSbO₇, Nature Partner Journals Quantum Materials (Accessed October 9, 2025)