• Publications
  • Influence
A Group-IV Ferromagnetic Semiconductor: MnxGe1−x
Calculated spin interactions and percolation theory predict transition temperatures larger than measured, consistent with the observed suppression of magnetically active Mn atoms and hole concentration.
Nanoscale control of an interfacial metal-insulator transition at room temperature.
The creation and erasure of nanoscale conducting regions at the interface between two insulating oxides, LaAlO3 and SrTiO3 are reported.
Twist Angle Dependent Atomic Reconstruction and Moiré Patterns in Transition Metal Dichalcogenide Heterostructures.
It is demonstrated that vdWH of MoSe2/WSe2 and MoS2/WS2 at twist angles ≤ 1° undergo significant atomic level reconstruction leading to discrete commensurate domains divided by narrow domain walls, rather than a smoothly varying rigid-lattice moiré pattern as has been assumed in prior experimental work.
Double Indirect Interlayer Exciton in a MoSe2/WSe2 van der Waals Heterostructure.
This work is able to clearly resolve two distinct emission peaks separated by 24 meV from an ILE in a MoSe2/WSe2 heterostructure fabricated using state-of-the-art preparation techniques, representing a significant advance in the understanding of the static and dynamic properties of TMD heterostructures.
Electron pairing without superconductivity
Strontium titanate (SrTiO3) is the first and best known superconducting semiconductor. It exhibits an extremely low carrier density threshold for superconductivity, and possesses a phase diagram
Optically mapping the electronic structure of coupled quantum dots
Arrays of quantum dots can be useful for building ‘artificial molecules’, and potentially as elements of quantum information networks. But in practice, no two dots are the same. An optical technique
Photoluminescence spectroscopy of the molecular biexciton in vertically stacked InAs-GaAs quantum dot pairs.
Photoluminescence studies of the molecular neutral biexciton-exciton spectra of individual vertically stacked InAs/GaAs quantum dot pairs are presented and either the hole or the electron levels of the two dots are tuned into tunneling resonances.
What superconducts in sulfur hydrides under pressure and why
The recent discovery of superconductivity at 190~K in highly compressed H$_{2}$S is spectacular not only because it sets a record high critical temperature, but because it does so in a material that
Structural, Electronic, and Magnetic Properties of MnO
We calculate the structural, electronic, and magnetic properties of MnO from first principles, using the full-potential linearized augmented planewave method, with both local-density and