Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session K24: Spin Liquids Theory and Application to Materials
8:00 AM–11:00 AM,
Wednesday, March 7, 2018
LACC Room: 403A
Sponsoring Units: GMAG DMP
Chair: Gang Chen, Fudan Univ
Abstract: K24.00006 : Josephson Current of Monopolar Spinons through a Quantum Spin Ice Junction
9:00 AM–9:12 AM
Quantum spin liquids are novel states of magnetic materials exhibiting long range quantum entanglement and topological order. They are characterized by exotic quasiparticles called spinons carrying fractionalized spin quanta and by emergent gauge fields. In particular quantum spin ice system accommodates bosonic magnetic monopolar spinons coupled to analogous electromagnetic fields. It can host a U(1) quantum spin liquid as a monopole insulator and a Higgs ferromagnet as a monopole superconductor. Here, we demonstrate an interference phenomena of spinons producing monopole supercurrent. Two Higgs ferromagnets weakly linked by a U(1) quantum spin liquid generates "Josephson supercurrent" of monopoles across the junction. Due to the analogous Amp`ere's law, the current produces an electric polarization in the U(1) quantum spin liquid medium, which is expected to be experimentally observed.
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