First-principles design of the spinel iridate Ir2O4 for high-temperature quantum spin ice

Abstract

Insulating magnetic rare-earth pyrochlores related to spin ice host emergent bosonic monopolar spinons, which obey a magnetic analogue of quantum electrodynamics and may open a route to a magnetic analogue of electronics. However, the energy scales of the interactions among rare-earth moments are so low as 1 K that the possible quantum coherence can only be achieved at a sub-Kelvin. Here, we desgin high-temperature quantum spin ice materials from first principles. It is shown that the A-site deintercalated spinel iridate Ir2O4, which has been experimentally grown as epitaxial thin films, is a promising candidate for quantum spin ice with a spin-ice-rule interaction of a few tens of meV. Controlling electronic structures of Ir2O4 through substrates, it is possible to tune magnetic interactions so that a magnetic Coulomb liquid persists at high temperatures.

5 pages, 3 figures

References in corpus (10)

• Pyrochlore Photons: The U(1) Spin Liquid in a S=1/2 Three-Dimensional Frustrated Magnet
• Dynamically-Induced Frustration as a Route to a Quantum Spin Ice State in Tb2Ti2O7 via Virtual Crystal Field Excitations and Quantum Many-Body Effects
• Unusual liquid state of hard-core bosons on the pyrochlore lattice
• Pyrochlore electrons under pressure, heat and field: shedding light on the iridates
• Competition between spin-orbit coupling, magnetism, and dimerization in the honeycomb iridates: $\alpha$-Li${}_2$IrO${}_3$ under pressure
• The effect of double counting, spin density, and Hund interaction in the different DFT+$U$ functionals
• Pressure-tuning of bond-directional exchange interactions and magnetic frustration in hyperhoneycomb iridate $\beta$-$\mathrm{L}{\mathrm{i}}_2\mathrm{Ir}{\mathrm{O}}_3$
• Detuning the Honeycomb of $\alpha$-RuCl${}_3$: Pressure-Dependent Optical Studies Reveal Broken Symmetry
• Pressure-driven collapse of the relativistic electronic ground state in a honeycomb iridate
• First-principles study on cubic pyrochlore iridates Y2Ir2O7 and Pr2Ir2O7

Cited by in corpus (2)

• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• Magnetic Monopole Supercurrent through a Quantum Spin Ice Tunnel Junction