Field-induced quantum spin- 12 chains and disorder in Nd2Zr2O7
| Autor: | Manfred Reehuis, A. T. M. N. Islam, Jens-Uwe Hoffmann, J. Xu, Bella Lake, I. Glavatskyy |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Field (physics) Condensed matter physics Scattering Pyrochlore Order (ring theory) 02 engineering and technology engineering.material Neutron scattering 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Spin ice symbols.namesake 0103 physical sciences engineering symbols 010306 general physics 0210 nano-technology Hamiltonian (quantum mechanics) |
| Zdroj: | Physical Review B. 98 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We present a single-crystal diffuse neutron scattering study on the quantum spin ice candidate ${\mathrm{Nd}}_{2}{\mathrm{Zr}}_{2}{\mathrm{O}}_{7}$ pyrochlore in magnetic fields along the $(110)$ direction. Two-dimensional scattering sheets perpendicular to the $(1\overline{1}0)$ direction were observed, evidencing field-induced one-dimensional correlations and disorder. The pyrochlore lattice is completely separated into orthogonal sets of chains, which is in strong contrast to classical spin ice and surprising for an ``all-in-all-out'' (AIAO) ordered magnet with a non-Ising Hamiltonian. Our mean-field and Monte Carlo simulations reveal that the $(110)$ field induces a transition from the AIAO order to a ``two-in-two-out'' disordered state with interactions between the two sets of chains canceled out, resulting in disorder and quantum spin-$\frac{1}{2} XYZ$ chains. |
| Databáze: | OpenAIRE |
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