Investigation of frustrated antiferromagnet on the honeycomb lattice with an applied field

ORAL

Abstract

Quantum spin-1/2 honeycomb XY antiferromagnet, or the equivalent hard-core boson system, with both nearest-neighbor J1 and next-nearest-neighbor J2 interactions is a representative frustrated system possibly hosting new phases of matter. Recent theoretical study suggests that this system may exhibit a series of incompressible states, which host fermionic elementary excitations rather than bosonic excitations, at small fixed filling factors or equivalent magnetic field strength. In this work, we will examine the theoretical prediction by directly studying the frustrated honeycomb J1-J2 XY model, using unbiased grand canonical density-matrix renormalization group technique. By searching for magnetization plateaus with an applied magnetic field, we will ultimately determine the presence of these incompressible states as well as their properties. For a more comprehensive study, different variants of this model, including the honeycomb J1-J2 Heisenberg antiferromagnet, will also be investigated.

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Authors

  • Shenxiu Liu

    Department of Physics, Stanford University

  • Hongchen Jiang

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford Institute of Materials and Energy Sciences, SLAC

  • Tom Devereaux

    SIMES, SLAC National Accelerator Laboratory and Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC & Stanford University, SIMES SLAC National Accelerator Laboratory, Stanford Institute of Materials and Energy Sciences, SLAC, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA, USA, Stanford University