Conveners
(DCMMP) R2-5 Quantum Materials III | Matériaux quantiques III (DPMCM)
- Jean-Sebastien Bernier (University of Northern British Columbia)
Dimer models and loop models have long been studied as prototypes for quantum ordering with local constraints. Robust physical realizations are not known, especially in solid state materials. We propose that a quantum loop model is indeed realized in MX$_2$, where M=Mo, W and X=S, Se or Te. In the single-layer 1T structure, each metal atom is in an octahedral chalcogen cage with two electrons...
We consider the square lattice S=½ quantum compass model (QCM) parameterized by
Jx, Jz, under an in-plane field. At the special field value,
(hx,hz)=2S(Jx,Jz), we show that the QCM Hamiltonian may be written in a
form such that two simple product states can be identified as exact
ground-states, below a gap. Exact excited states can also be found. The exact
product states are...
Many-body localization impedes the spread of information encoded in initial conditions, blocking (or at least radically slowing) thermalization of an isolated quantum system. We examine the potential to tailor the growth of entanglement in the Fermi Hubbard model by tuning disorder in both the charge and spin degrees of freedom. We begin by expressing the Hamiltonian in terms of a set of...
Graphene is a beautiful and incredibly versatile platform for investigating emergent electronic phenomena. Confining electrons to two dimensions enhances their influence on one another, and empowers us to alter their environment with external fields and additional layers. Strategic combinations and arrangements of layered materials can yield new physics and surprising electronic properties. I...