A promising candidate for a quantum spin liquid
12 Jan 2018





​Ytterbium-magnesium-gallium-tetraoxide (YbMgGaO4 ) is a newly discovered material and a promising candidate for a quantum spin liquid (QSL) - an exotic state of matter with magnet moments that exhibit unusual behaviour. QSLs have potential applications in high temperature superconductivity and quantum computing. Muon spin relaxation and rotation (μSR) is an ideal technique for experimentally probing the ground state, and can be performed in a true zero field. A paper in Physical Review Letters presents a comprehensive μSR investigation of the ground state spin dynamics of single crystals of YbMgGaO4 , and provides compelling evidence for the formation of a gapless U(1) QSL ground state in this structurally perfect rare-earth triangular antiferromagnetic.

Related publication: Yuesheng Li et al. “Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO4 ” Phys. Rev. Lett. 117 (2016) : 097201. DOI: 10.1103/PhysRevLett.117.097201​​