M.A. Khan

activity

20162025

collaborators

Showing cond-mat.mtrl-sciShow all

3 papers · 1 filter

cond-mat.mtrl-sci2025

Emergent Superfluidity of Hard-Core Excitons in Single-Layer Breathing-Kagome Nb $_{3}$ Te $_{x}$ Cl $_{8 - x}$

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- $U$ Bose--Hubbard model to an effective XXZ spin-$\frac{…

cond-mat.mtrl-sci2025

Er $_{Al}$ :Al $_{2}$ O $_{3}$ for Telecom-Band Photonics: Electronic Structure and Optical Properties

Mahtab A. Khan, Jayden D. Craft, Hari P. Paudel +3

Er-doped Al $_{2}$ O $_{3}$ is a promising host for telecom-band integrated photonics. Here we combine ab initio calculations with a symmetry-resolved analysis to elucidate substitutional…

cond-mat.mtrl-sci2024

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb $_{3}$ Cl $_{8}$

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…

Emergent Superfluidity of Hard-Core Excitons in Single-Layer Breathing-Kagome Nb3​Tex​Cl8−x​

ErAl​:Al2​O3​ for Telecom-Band Photonics: Electronic Structure and Optical Properties

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb3​Cl8​

Emergent Superfluidity of Hard-Core Excitons in Single-Layer Breathing-Kagome Nb $_{3}$ Te $_{x}$ Cl $_{8 - x}$

Er $_{Al}$ :Al $_{2}$ O $_{3}$ for Telecom-Band Photonics: Electronic Structure and Optical Properties

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb $_{3}$ Cl $_{8}$