Quantum particles on a lattice with competing long-range interactions are ubiquitous in
physics; transition metal oxides,, layered molecular crystals and trapped-ion arrays are a few …

Abstract Two-dimensional (2D) transition metal dichalcogenide (TMDC) semiconductors not
only hold great promises for the development of ultra-thin optoelectronic devices with low …

Starting with the isolation of a single sheet of graphene, the study of layered materials has
been one of the most active areas of condensed matter physics, chemistry, and materials …

Active polarization control is highly desirable in photonic systems but has been limited
mostly to discrete structures in bulky dielectric media and liquid crystal–based variable …

The ability to directly monitor the states of electrons in modern field-effect devices—for
example, imaging local changes in the electrical potential, Fermi level and band structure as …

Monolayer transition metal dichalcogenides (TMDs) exhibit a remarkably strong Coulomb
interaction that manifests in tightly bound excitons. Due to the complex electronic band …

Recently, two-dimensional Janus materials have attracted increasing interest due to their
unique structure and novel properties. Based on density-functional and many-body …

A key feature of monolayer semiconductors, such as transition-metal dichalcogenides, is the
poorly screened Coulomb potential, which leads to a large exciton binding energy (E b) and …

Strong Coulomb attraction in monolayer transition metal dichalcogenides gives rise to tightly
bound excitons and many-body interactions that dominate their optoelectronic properties …

We study the electronic band structure in the K/K′ valleys of the Brillouin zone of monolayer
WSe2 and MoSe2 by optical reflection and photoluminescence spectroscopy on dual-gated …