Revisiting spin ice physics in the ferromagnetic Ising pyrochlore Pr$_2$Sn$_2$O$_7$
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arXiv
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| Natura: | Preprint |
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2023
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| author | Ortiz, Brenden R. Sarte, Paul M. Pokharel, Ganesh Knudston, Miles J. Alvarado, Steven J. Gomez May, Andrew F. Calder, Stuart Mangin-Thro, Lucile Wildes, Andrew R. Zhou, Haidong Sala, Gabriele Wiebe, Chris R. Wilson, Stephen D. Paddison, Joseph A. M. Aczel, Adam A. |
| author_facet | Ortiz, Brenden R. Sarte, Paul M. Pokharel, Ganesh Knudston, Miles J. Alvarado, Steven J. Gomez May, Andrew F. Calder, Stuart Mangin-Thro, Lucile Wildes, Andrew R. Zhou, Haidong Sala, Gabriele Wiebe, Chris R. Wilson, Stephen D. Paddison, Joseph A. M. Aczel, Adam A. |
| contents | Pyrochlore materials are characterized by their hallmark network of corner-sharing rare-earth tetrahedra, which can produce a wide array of complex magnetic ground states. Ferromagnetic Ising pyrochlores often obey the "two-in-two-out" spin ice rules, which can lead to a highly-degenerate spin structure. Large moment systems, such as Ho$_2$Ti$_2$O$_7$ and Dy$_2$Ti$_2$O$_7$, tend to host a classical spin ice state with low-temperature spin freezing and emergent magnetic monopoles. Systems with smaller effective moments, such as Pr$^{3+}$-based pyrochlores, have been proposed as excellent candidates for hosting a "quantum spin ice" characterized by entanglement and a slew of exotic quasiparticle excitations. However, experimental evidence for a quantum spin ice state has remained elusive. Here, we show that the low-temperature magnetic properties of Pr$_2$Sn$_2$O$_7$ satisfy several important criteria for continued consideration as a quantum spin ice. We find that Pr$_2$Sn$_2$O$_7$ exhibits a partially spin-frozen ground state with a large volume fraction of dynamic magnetism. Our comprehensive bulk characterization and neutron scattering measurements enable us to map out the magnetic field-temperature phase diagram, producing results consistent with expectations for a ferromagnetic Ising pyrochlore. We identify key hallmarks of spin ice physics, and show that the application of small magnetic fields ($μ_0 H_c \sim$0.75T) suppresses the spin ice state and induces a long-range ordered magnetic structure. Together, our work clarifies the current state of Pr$_2$Sn$_2$O$_7$ and encourages future studies aimed at exploring the potential for a quantum spin ice ground state in this system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_16180 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Revisiting spin ice physics in the ferromagnetic Ising pyrochlore Pr$_2$Sn$_2$O$_7$ Ortiz, Brenden R. Sarte, Paul M. Pokharel, Ganesh Knudston, Miles J. Alvarado, Steven J. Gomez May, Andrew F. Calder, Stuart Mangin-Thro, Lucile Wildes, Andrew R. Zhou, Haidong Sala, Gabriele Wiebe, Chris R. Wilson, Stephen D. Paddison, Joseph A. M. Aczel, Adam A. Strongly Correlated Electrons Materials Science Pyrochlore materials are characterized by their hallmark network of corner-sharing rare-earth tetrahedra, which can produce a wide array of complex magnetic ground states. Ferromagnetic Ising pyrochlores often obey the "two-in-two-out" spin ice rules, which can lead to a highly-degenerate spin structure. Large moment systems, such as Ho$_2$Ti$_2$O$_7$ and Dy$_2$Ti$_2$O$_7$, tend to host a classical spin ice state with low-temperature spin freezing and emergent magnetic monopoles. Systems with smaller effective moments, such as Pr$^{3+}$-based pyrochlores, have been proposed as excellent candidates for hosting a "quantum spin ice" characterized by entanglement and a slew of exotic quasiparticle excitations. However, experimental evidence for a quantum spin ice state has remained elusive. Here, we show that the low-temperature magnetic properties of Pr$_2$Sn$_2$O$_7$ satisfy several important criteria for continued consideration as a quantum spin ice. We find that Pr$_2$Sn$_2$O$_7$ exhibits a partially spin-frozen ground state with a large volume fraction of dynamic magnetism. Our comprehensive bulk characterization and neutron scattering measurements enable us to map out the magnetic field-temperature phase diagram, producing results consistent with expectations for a ferromagnetic Ising pyrochlore. We identify key hallmarks of spin ice physics, and show that the application of small magnetic fields ($μ_0 H_c \sim$0.75T) suppresses the spin ice state and induces a long-range ordered magnetic structure. Together, our work clarifies the current state of Pr$_2$Sn$_2$O$_7$ and encourages future studies aimed at exploring the potential for a quantum spin ice ground state in this system. |
| title | Revisiting spin ice physics in the ferromagnetic Ising pyrochlore Pr$_2$Sn$_2$O$_7$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2310.16180 |