2016/08/31 by Heung-Sik Kim, Heung‐Sik Kim, Yong Baek Kim +2 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Frustration #Geometrical frustration #Ground state #Hydrostatic pressure #Lattice (music) #Magnetic moment #Multiferroics and related materials #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum fluctuation #Quantum mechanics #Quantum phase transition #Quantum phases #Quantum spin liquid #Spin (aerodynamics) #Spin polarization #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.94.245127
published as Phys. Rev. B 94, 245127 (2016) · 7 pages, 4 figures, and 2 tables
openalex publication_date 2016/12/20 · arxiv created 2016/12/22 · arxiv updated 2016/12/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
There have been tremendous experimental and theoretical efforts toward the discovery of a quantum spin-liquid phase in honeycomb-based-lattice materials with strong spin-orbit coupling. Here the bond-dependent Kitaev interaction between local moments provides strong magnetic frustration and, if it is the only interaction present in the system, it will lead to an exactly solvable quantum spin-liquid ground state. In all of these materials, however, the ground state is in a magnetically ordered phase due to additional interactions between local moments. Recently, it has been reported that the magnetic order in the hyperhoneycomb material, \ensuremathβ\text\ensuremath-Li2IrO3, is suppressed upon applying hydrostatic pressure and the resulting state becomes a quantum paramagnet or possibly a quantum spin liquid. Using ab initio computations and strong-coupling expansion, we investigate the lattice structure and resulting local moment model in pressurized \ensuremathβ\text\ensuremath-Li2IrO3. Remarkably, the dominant interaction under high pressure is not the Kitaev interaction or further neighbor interactions, but a different kind of bond-dependent interaction. This leads to strong magnetic frustration and may provide a platform for discovery of a new kind of quantum spin-liquid ground state.