4 papers · 1 filter
Emergent Superfluidity of Hard-Core Excitons in Single-Layer Breathing-Kagome NbTeCl
Mahtab A. Khan, Michael N. Leuenberger
We develop a microscopic theory of superfluidity for hard-core dark excitons on the triangular lattice by mapping the large- Bose--Hubbard model to an effective XXZ spin-$\frac{…
Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material NbCl
Mahtab A. Khan, Naseem Ud Din, Dmitry Skachkov +2
Flat electronic bands strongly enhance Coulomb interactions and can stabilize unconventional insulating states. Motivated by the recent discovery of flat bands in breathing Kagome…
Er:AlO for Telecom-Band Photonics: Electronic Structure and Optical Properties
Mahtab A. Khan, Jayden D. Craft, Hari P. Paudel +3
Er-doped AlO is a promising host for telecom-band integrated photonics. Here we combine ab initio calculations with a symmetry-resolved analysis to elucidate substitutional…
Tuning the Electronic and Optical Properties of Impurity-Engineered Two-Dimensional Graphullerene Half-Semiconductors
M. A. Khan, Madeeha Atif, Michael N. Leuenberger
A novel material consisting of a monolayer of C buckyballs with hexagonal symmetry has recently been observed experimentally, named graphullerene. In this study, we present…