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Emergent Chiral Spin Liquid: Fractional Quantum Hall Effect in a Kagome Heisenberg Model

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep06317· OSTI ID:1624741
 [1];  [2];  [2]
  1. California State Univ. (CalState), Northridge, CA (United States). Dept. of Physics and Astronomy; DOE/OSTI
  2. California State Univ. (CalState), Northridge, CA (United States). Dept. of Physics and Astronomy

The fractional quantum Hall effect (FQHE) realized in two-dimensional electron systems under a magnetic field is one of the most remarkable discoveries in condensed matter physics. Interestingly, it has been proposed that FQHE can also emerge in time-reversal invariant spin systems, known as the chiral spin liquid (CSL) characterized by the topological order and the emerging of the fractionalized quasiparticles. A CSL can naturally lead to the exotic superconductivity originating from the condense of anyonic quasiparticles. Although CSL was highly sought after for more than twenty years, it had never been found in a spin isotropic Heisenberg model or related materials. By developing a density-matrix renormalization group based method for adiabatically inserting flux, we discover a FQHE in a spin-$$ \frac{1}{2}$$ isotropic kagome Heisenberg model. We identify this FQHE state as the long-sought CSL with a uniform chiral order spontaneously breaking time reversal symmetry, which is uniquely characterized by the half-integer quantized topological Chern number protected by a robust excitation gap. The CSL is found to be at the neighbor of the previously identified Z2 spin liquid, which may lead to an exotic quantum phase transition between two gapped topological spin liquids.

Research Organization:
California State Univ. (CalState), Long Beach, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-06ER46305
OSTI ID:
1624741
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 4; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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A Kagome Map of Spin Liquids: from XXZ to Dzyaloshinskii-Moriya Ferromagnet text January 2015
A kagome map of spin liquids from XXZ to Dzyaloshinskii–Moriya ferromagnet journal January 2016
Chiral spin liquid and emergent anyons in a Kagome lattice Mott insulator journal October 2014
Tuning topological phase and quantum anomalous Hall effect by interaction in quadratic band touching systems journal September 2018
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Topological flat band, Dirac fermions and quantum spin Hall phase in 2D Archimedean lattices journal January 2019
Quantum spin liquids: a review journal November 2016
Effective field theory of chiral spin liquid between ordered phases in a kagome antiferromagnet journal May 2018
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Effective multi-body SU( N )-symmetric interactions of ultracold fermionic atoms on a 3D lattice journal April 2019
Topological characterization of hierarchical fractional quantum Hall effects in topological flat bands with SU( N ) symmetry journal August 2019
S = 1 2 kagome Heisenberg antiferromagnet revisited journal October 2019
Chiral spin liquid with spinon Fermi surfaces in the spin- 1 2 triangular Heisenberg model journal December 2019
Continuous phase transition between bosonic integer quantum Hall liquid and a trivial insulator: Evidence for deconfined quantum criticality journal January 2020
Determining topological order from infinite projected entangled pair states journal January 2020
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Spin- 1 2 Heisenberg J 1 − J 2 antiferromagnet on the kagome lattice journal January 2015
Global phase diagram of competing ordered and quantum spin-liquid phases on the kagome lattice journal February 2015
Phase diagram of the J 1 − J 2 Heisenberg model on the kagome lattice journal March 2015
Chiral topological spin liquids with projected entangled pair states journal June 2015
Chiral spin liquids in arrays of spin chains journal June 2015
Chiral and critical spin liquids in a spin- 1 2 kagome antiferromagnet journal July 2015
Gapless chiral spin liquid in a kagome Heisenberg model journal August 2015
Competing spin-liquid states in the spin- 1 2 Heisenberg model on the triangular lattice journal October 2015
Topological characterization of the non-Abelian Moore-Read state using density-matrix renormalization group journal October 2015
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Field-induced dynamical properties of the XXZ model on a honeycomb lattice journal January 2016
Variational identification of a fractional Chern insulator in an extended Bose-Hubbard model journal January 2016
Projective symmetry group classification of chiral spin liquids journal March 2016
Spin liquid nature in the Heisenberg J 1 − J 2 triangular antiferromagnet journal April 2016
Non-Abelian topological spin liquids from arrays of quantum wires or spin chains journal May 2016
Emergent quasi-one-dimensionality in a kagome magnet: A simple route to complexity journal July 2016
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Gapped spin liquid with Z 2 topological order for the kagome Heisenberg model journal June 2017
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Signatures of Dirac Cones in a DMRG Study of the Kagome Heisenberg Model journal July 2017
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Emergent Multi-Flavor QED 3 at the Plateau Transition between Fractional Chern Insulators: Applications to Graphene Heterostructures journal July 2018
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Chiral spin liquid and emergent anyons in a Kagome lattice Mott insulator text January 2014
Designing Frustrated Quantum Magnets with Laser-Dressed Rydberg Atoms text January 2014
Gapless chiral spin liquid in a kagome Heisenberg model text January 2014
Topological Characterization of Non-Abelian Moore-Read State using Density-Matrix Renormailzation Group text January 2014
Chiral Spin Liquids in Arrays of Spin Chains text January 2015
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A Quantum Dipolar Spin Liquid text January 2015
Projective symmetry group classification of chiral spin liquids text January 2015
Ground state phase diagram of the triangular lattice Hubbard model by density matrix renormalization group method text January 2016
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Lattice effects on Laughlin wave functions and parent Hamiltonians text January 2016
Signatures of Dirac cones in a DMRG study of the Kagome Heisenberg model text January 2016
Neural-Network Quantum States, String-Bond States, and Chiral Topological States text January 2017
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Continuous phase transition between bosonic integer quantum Hall liquid and trivial insulator: evidences for deconfined quantum criticality text January 2019
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