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Article Dans Une Revue Physical Review X Année : 2017

Disorder and quantum spin ice

Résumé

We report on diffuse neutron scattering experiments providing evidence for the presence of random strains in the quantum spin-ice candidate Pr2Zr2O7. Since Pr3+ is a non-Kramers ion, the strain deeply modifies the picture of Ising magnetic moments governing the low-temperature properties of this material. It is shown that the derived strain distribution accounts for the temperature dependence of the specific heat and of the spin-excitation spectra. Taking advantage of mean-field and spin-dynamics simulations, we argue that the randomness in Pr2Zr2O7 promotes a new state of matter, which is disordered yet characterized by short-range antiferroquadrupolar correlations, and from which emerge spin-ice-like excitations. Thus, this study gives an original research route in the field of quantum spin ice.
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Dates et versions

hal-01635112 , version 1 (25-05-2022)

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N. Martin, P. Bonville, Elsa Lhotel, S. Guitteny, A. Wildes, et al.. Disorder and quantum spin ice. Physical Review X, 2017, 7 (4), pp.041028. ⟨10.1103/PhysRevX.7.041028⟩. ⟨hal-01635112⟩
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