Epitaxial stabilization of (111)-oriented frustrated quantum pyrochlore thin films

Abstract

Frustrated rare-earth pyrochlore titanates, Yb${}_2$Ti${}_2$O${}_7$, and Tb${}_2$Ti${}_2$O${}_7$ have been proposed as promising candidates to realize quantum spin ice (QSI). Multiple exotic quantum phases, including Coulombic ferromagnet, quantum valence-bond solid, and quadrupolar ordering, have been predicted to emerge in the QSI state upon application of a (111)-oriented external magnetic field. Here, we report on the primal successful layer-by-layer growth of ultra-thin films of frustrated quantum pyrochlores, R${}_2$Ti${}_2$O${}_7$ (R = Er, Yb, and Tb), along the (111) direction. We confirm their high crystallinity and proper chemical composition by a combination of methods, including in-situ RHEED, x-ray diffraction, reciprocal space mapping, and x-ray photoelectron spectroscopy. The availability of large area (111)-oriented QSI structures with planar geometry offers a new complementary to the bulk platform to explore strain and magnetic field dependent properties in the quasi-2D limit.

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Cited by in corpus (6)

• Synthesis of epitaxial magnetic pyrochlore heterojunctions
• [111]-strained spin ice: Localization of thermodynamically deconfined monopoles
• Probing ice-rule-breaking transition in $\mathrm{D}{\mathrm{y}}_2\mathrm{T}{\mathrm{i}}_2{\mathrm{O}}_7$ thin film by proximitized transport and magnetic torque
• Flavor Nernst effects in quantum paramagnets
• Magnon bands in pyrochlore slabs with Heisenberg exchange and anisotropies
• Hearing the light: stray-field noise from the emergent photon in quantum spin ice