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Symmetry protected topological orders and the group cohomology of their symmetry group
Symmetry protected topological (SPT) phases are gapped short-range-entangled quantum phases with a symmetry G. They can all be smoothly connected to the same trivial product state if we break the
Symmetry-Protected Topological Orders in Interacting Bosonic Systems
Just as group theory allows us to construct 230 crystal structures in three-dimensional space, group cohomology theory is used to systematically construct different interacting bosonic SPT phases in any dimension and with any symmetry, leading to the discovery of bosonic topological insulators and superconductors.
Two-dimensional symmetry-protected topological orders and their protected gapless edge excitations
Topological insulators in free fermion systems have been well characterized and classified. However, it is not clear in strongly interacting boson or fermion systems what symmetry-protected
Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α-RuCl_{3}.
It is demonstrated that α-RuCl_{3} undergoes a quantum phase transition to a QSL in a magnetic field of 7.5 T applied in the ab plane and that this high-field QSL phase has gapless spin excitations over a field range up to 16 T.
High-pressure magnetization and NMR studies of α − RuCl 3
We report high-pressure magnetization and $^{35}\mathrm{Cl}$ NMR studies on $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{RuCl}}_{3}$ with pressure up to 1.5 GPa. At low pressures, the magnetic
Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6
As a 3d-magnet with a field-induced disordered state on an effective spin-1/2 honeycomb lattice, NCTO expands the Kitaev model to 3d compounds, promoting further interests on the spin-orbital effect in quantum magnets.
Manipulating topological edge spins in a one-dimensional optical lattice.
A novel scheme to manipulate the zero modes and realize single spin control in an optical lattice is demonstrated, which has potential applications to quantum computation.
One Proximate Kitaev Spin Liquid in the K-J-Γ Model on the Honeycomb Lattice.
The quantum (S=1/2) K-J-Γ model on the honeycomb lattice is investigated by a variational Monte Carlo method and it is found that there is just one proximate Kitaev spin liquid (KSL), while the rest of the phase diagram contains different magnetically ordered states.
Raman Signature of the U(1) Dirac Spin-Liquid State in the Spin-1/2 Kagome System
We followed the Shastry--Shraiman formulation of Raman scattering in Hubbard systems and considered the Raman intensity profile in the spin-1/2 "perfect" kagome lattice herbertsmithite