Gapless spin liquids in disguise

  title={Gapless spin liquids in disguise},
  author={Francesco Ferrari and Alberto Parola and Federico Becca},
We show that gapless spin liquids, which are potential candidates to describe the ground state of frustrated Heisenberg models in two dimensions, become trivial insulators on cylindrical geometries with an even number of legs. In particular, we report calculations for Gutzwiller-projected fermionic states on strips of square and kagome lattices. By choosing different boundary conditions for the fermionic degrees of freedom, both gapless and gapped states may be realized, the latter ones having… 

Trimer quantum spin liquid in a honeycomb array of Rydberg atoms

Quantum spin liquids are elusive but paradigmatic examples of strongly correlated quantum states that are characterized by long-range quantum entanglement. Recently, the direct signatures of a gapped

Dynamical Signatures of Symmetry Broken and Liquid Phases in an $S=1/2$ Heisenberg Antiferromagnet on the Triangular Lattice

We present the dynamical spin structure factor of the antiferromagnetic spin- 12 J 1 − J 2 Heisenberg model on a triangular lattice obtained from large-scale matrix-product state simulations. The

Phase diagram of a distorted kagome antiferromagnet and application to Y-kapellasite

We investigate the magnetism of a previously unexplored distorted spin-1/2 kagome model consisting of three symmetry-inequivalent nearest-neighbor antiferromagnetic Heisenberg couplings J ⬡ , J , and

Gutzwiller projected states for the J1−J2 Heisenberg model on the Kagome lattice: Achievements and pitfalls

Yasir Iqbal, ∗ Francesco Ferrari, Aishwarya Chauhan, Alberto Parola, Didier Poilblanc, and Federico Becca Department of Physics and Quantum Centers in Diamond and Emerging Materials (QuCenDiEM)

Distorted kagome antiferromagnet: Phase diagram and application to Y-kapellasite

Max Hering, 2, ∗ Francesco Ferrari, † Aleksandar Razpopov, Igor I. Mazin, Roser Valent́ı, Harald O. Jeschke, and Johannes Reuther 2 Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner

Structures of magnetic excitations in the spin- 12 kagome-lattice antiferromagnets Cs2Cu3SnF12 and Rb2Cu3SnF12

Structures of magnetic excitations in spin-1/2 kagome-lattice antiferromagnets Cs2Cu3SnF12 and Rb2Cu3SnF12 Mutsuki Saito1,∗ Ryunosuke Takagishi, Nobuyuki Kurita, Masari Watanabe, Hidekazu Tanaka1,†



Spin-Liquid Ground State of the S = 1/2 Kagome Heisenberg Antiferromagnet

This work uses the density matrix renormalization group to perform accurate calculations of the ground state of the nearest-neighbor quantum spin S = 1/2 Heisenberg antiferromagnet on the kagome lattice and provides strong evidence that, for the infinite two-dimensional system, the groundState of this model is a fully gapped spin liquid.

Identifying spinon excitations from dynamic structure factor of spin-1/2 Heisenberg antiferromagnet on the Kagome lattice

The dynamic spin structure factor (DSSF) of the KAFM is studied by means of the density matrix renormalization group and the condensation of two-spinon bound state driving the quantum-phase transition is identified as the driving force.

Quantum spin liquids: a review

This review discusses the nature of such phases and their properties based on paradigmatic models and general arguments, and introduces theoretical technology such as gauge theory and partons, which are conveniently used in the study of quantum spin liquids.

Fractional excitations in the square lattice quantum antiferromagnet

The results establish the existence of fractional quasiparticles in the high-energy spectrum of a quasi-two-dimensional antiferromagnet, even in the absence of frustration.

The spin-1/2 J1–J2 Heisenberg antiferromagnet on the square lattice: Exact diagonalization for N=40 spins

AbstractWe present numerical exact results for the ground state and the low-lying excitations for the spin-1/2 J1-J2 Heisenberg antiferromagnet on finite square lattices of up to N=40 sites. Using

Entanglement signatures of emergent Dirac fermions: Kagome spin liquid and quantum criticality

A numerical Aharonov-Bohm experiment on the kagome antiferromagnetic Heisenberg model is performed and the entanglement signatures of emergent Dirac spinons are revealed, which are the fractionalized excitations of the QSL.

Quantum Monte Carlo Approaches for Correlated Systems

Over the past several decades, computational approaches to studying strongly-interacting systems have become increasingly varied and sophisticated. This book provides a comprehensive introduction to