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Disordered Route to the Coulomb Quantum Spin Liquid: Random Transverse Fields on Spin Ice in Pr2Zr2O7



J.-J. Wen, S.M. Koohpayeh, K. A. Ross, B. A. Trump, T. M. McQueen, K. Kimura, S. Nakatsuji, Yiming Qiu, D. M. Pajerowski, John R. Copley, Collin L. Broholm


Inelastic neutron scattering reveals a broad continuum of excitations in Pr2Zr2O7, the temperature and magnetic field dependence of which indicate a continuous distribution of quenched transverse fields (Δ}) acting on the non-Kramers Pr3+ crystal fields ground state doublets. Spin-ice correlations are apparent within 0.2 meV of the Zeeman energy. A random phase approximation provides an excellent account of the data with a transverse field distribution ρ(Δ}) ∝ (Δ}2 + Γ2)U-1^ where Δ} = 0.28(1) meV. Established during high temperature synthesis due to an underlying structural instability, it appears disorder in Pr2Zr2O7 actually induces a quantum spin liquid.
Physical Review Letters


quantum spin liquid, spin ice, inelastic neutron scattering


Wen, J. , Koohpayeh, S. , Ross, K. , Trump, B. , McQueen, T. , Kimura, K. , Nakatsuji, S. , Qiu, Y. , Pajerowski, D. , Copley, J. and Broholm, C. (2017), Disordered Route to the Coulomb Quantum Spin Liquid: Random Transverse Fields on Spin Ice in Pr<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, Physical Review Letters, [online], (Accessed June 25, 2024)


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Created March 7, 2017, Updated October 12, 2021