2016/12/02 by Shigeki Onoda, Fumiyuki Ishii
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Magnetic and transport properties of perovskites and related materials #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum dot #Quantum mechanics #Spin (aerodynamics) #Spin ice #Spinel #Spinon #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.122.067201
published as Phys. Rev. Lett. 122, 067201 (2019) · 5 pages, 3 figures
arxiv created 2016/12/02 · openalex created_date 2016/12/16 · openalex publication_date 2019/02/12 · arxiv updated 2019/02/20 · openalex updated_date 2026/08/05
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 spinonics. However, the energy scales of the interactions among rare-earth moments are so low (∼ 1 K) that the possible quantum coherence can be achieved at a sub-Kelvin scale. Here, we design 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.