First-Principles Prediction of a Room-Temperature Ferromagnetic Janus VSSe Monolayer with Piezoelectricity, Ferroelasticity, and Large Valley Polarization

Anomalous temperature-dependent spin-valley polarization in monolayer WS2

Single layers of transition metal dichalcogenides (TMDs) are direct gap semiconductors with nondegenerate valley indices. An intriguing possibility for these materials is the use of their valley index as an alternate state variable. Several limitations to such a utility include strong intervalley scattering, as well as multiparticle interactions leading to multiple emission channels. We prepare...

Valley Hall effect in disordered monolayer MoS2 from first principles

Room Temperature Ferromagnetic Mn:Ge(001)

We report the synthesis of a room temperature ferromagnetic Mn-Ge system obtained by simple deposition of manganese on Ge(001), heated at relatively high temperature (starting with 250 °C). The samples were characterized by low energy electron diffraction (LEED), scanning tunneling microscopy (STM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS)...

Room-temperature Tamm-plasmon exciton-polaritons with a WSe2 monolayer

Solid-state cavity quantum electrodynamics is a rapidly advancing field, which explores the frontiers of light-matter coupling. Metal-based approaches are of particular interest in this field, as they carry the potential to squeeze optical modes to spaces significantly below the diffraction limit. Transition metal dichalcogenides are ideally suited as the active material in cavity quantum elect...

Polarization and valley switching in monolayer group-IV monochalcogenides

Paul Z. Hanakata,1 Alexandra Carvalho,2 David K. Campbell,1,* and Harold S. Park3,† 1Department of Physics, Boston University, Boston, Massachusetts 02215, USA 2Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546, Singapore 3Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, USA (Received 1...