187 citations · 385 across the 7 of their papers we have counts for
8 papers
Electron-phonon coupling in single-layer MoS2
Sanjoy K. Mahatha, Arlette S. Ngankeu, Nicki Frank Hinsche +15
The electron-phonon coupling strength in the spin-split valence band maximum of single-layer MoS is studied using angle-resolved photoemission spectroscopy and density function…
Electron-phonon coupling in the spin-split valence band of single layer WS
Nicki Frank Hinsche, Arlette S. Ngankeu, Kevin Guilloy +15
The absence of inversion symmetry leads to a strong spin-orbit splitting of the upper valence band of semiconducting single layer transition metal dichalchogenides such as MoS…
Quasi one-dimensional metallic band dispersion in the commensurate charge density wave of -TaS
Arlette S. Ngankeu, Kevin Guilloy, Sanjoy K. Mahatha +5
The commensurate charge density wave (CDW) in the layered compound -TaS has hitherto mostly been treated as a quasi two-dimensional phenomenon. Recent band structure calcul…
Optically pumped GeSn micro-disks with 16 % Sn lasing at 3.1 um up to 180K
V. Reboud, A. Gassenq, N. Pauc +13
Recent demonstrations of optically pumped lasers based on GeSn alloys put forward the prospect of efficient laser sources monolithically integrated on a Si photonic platform. For i…
Raman spectral shift versus strain and composition in GeSn layers with: 6 to 15% Sn contents
A. Gassenq, L. Milord, J. Aubin +8
GeSn alloys are the subject of intense research activities as these group IV semiconductors present direct bandgap behaviors for high Sn contents. Today, the control of strain beco…
Germanium under high tensile stress: nonlinear dependence of direct band gap vs. strain
K. Guilloy, N. Pauc, A. Gassenq +15
Germanium is a strong candidate as a laser source for silicon photonics. It is widely accepted that the band structure of germanium can be altered by tensile strain so as to reduce…
Lattice strain and tilt mapping in stressed Ge microstructures using X-ray Laue micro-diffraction and rainbow-filtering
Samuel Tardif, Alban Gassenq, Kevin Guilloy +14
Micro-Laue diffraction and simultaneous rainbow-filtered micro-diffraction were used to measure accurately the full strain tensor and the lattice orientation distribution at the su…
Uniaxially stressed germanium with fundamental direct band gap
R. Geiger, T. Zabel, E. Marin +17
We demonstrate the crossover from indirect- to direct band gap in tensile-strained germanium by temperature-dependent photoluminescence. The samples are strained microbridges that…