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      Quantum Spin Ice in the Pyrochlore Pr\(_2\)Hf\(_2\)O\(_7\)

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          Abstract

          We report the low temperature magnetic properties of the pyrochlore Pr\(_2\)Hf\(_2\)O\(_7\). Polycrystalline and single-crystal samples are investigated using time-of-flight neutron spectroscopy and macroscopic measurements, respectively. The crystal field splitting produces a non-Kramers ground state doublet for Pr\(^{3+}\), with Ising-like anisotropy. Below 0.5 K, the system enters a quantum spin ice state, associated with a metamagnetic behavior at \(\mu_0H_c\sim2.4\) T, and the development of a discrete inelastic excitation in the neutron spectra, which we attribute to cooperative quantum fluctuations.

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          Journal
          1601.05071

          Condensed matter
          Condensed matter

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