Magnetic monopoles in spin ice
This work proposes that magnetic monopoles emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles, which would account for a mysterious phase transition observed experimentally in spin ice in a magnetic field.
Proximate Kitaev quantum spin liquid behaviour in a honeycomb magnet.
The excitation spectrum of α-RuCl3 is proposed as a prime candidate for fractionalized Kitaev physics, and dynamical response measurements above interlayer energy scales are naturally accounted for in terms of deconfinement physics expected for QSLs.
Resonating valence bond phase in the triangular lattice quantum dimer model.
The quantum dimer model on the triangular lattice is studied, which is expected to describe the singlet dynamics of frustrated Heisenberg models in phases where valence bond configurations dominate their physics, and it is found that there is a truly short ranged resonating valence Bond phase with no gapless excitations and with deconfined, gapped, spinons for a finite range of parameters.
Phase Structure of Driven Quantum Systems.
It is shown that their disordered Floquet many-body localized counterparts can exhibit distinct ordered phases delineated by sharp transitions, and these are analogs of equilibrium states with broken symmetries and topological order.
Ising models of quantum frustration
We report on a systematic study of two-dimensional, periodic, frustrated Ising models with quantum dynamics introduced via a transverse magnetic field. The systems studied are the triangular and…
One-dimensional symmetry protected topological phases and their transitions
We present a unified perspective on symmetry protected topological (SPT) phases in one dimension and address the open question of what characterizes their phase transitions. In the first part of this…
Neutron scattering in the proximate quantum spin liquid α-RuCl3
A comprehensive inelastic neutron scattering study of single crystals of the material α-RuCl3, which has been predicted to a host a Kitaev spin liquid, finds highly unusual signals, including a column of scattering over a large energy interval around the Brillouin zone center, which is consistent with scattering from the Majorana excitations of a KQSL.
Stark Many-Body Localization.
It is shown that this system remains localized in the presence of interactions and exhibits physics analogous to models of conventional many-body localization (MBL), and that a quench experiment starting from a charge-density wave state would show results similar to those of Schreiber et al.
Finite-size scaling of eigenstate thermalization.
- W. Beugeling, R. Moessner, M. Haque
- Physics, Computer SciencePhysical review. E, Statistical, nonlinear, and…
- 13 August 2013
This work presents numerical evidence that for generic nonintegrable systems these fluctuations scale with a universal power law D-1/2 with the dimension D of the Hilbert space and provides heuristic arguments, in the same spirit as the ETH, to explain this universal result.
Properties of a classical spin liquid: the Heisenberg pyrochlore antiferromagnet
We study the low-temperature behavior of the classical Heisenberg antiferromagnet with nearest neighbor interactions on the pyrochlore lattice. Because of geometrical frustration, the ground state of…