Importantly, the DFT electronic energy-level alignment of the Dirac point within the gap is different in the two systems, located 0.89 and 0.51 eV below the TMD conduction band minimum at K for 0° and 30°-twisted HSs, respectively. The GW TMD band gaps are found to be 2.59 eV...
The saturable intensity is about 0.6 GW/cm2, which is much larger than that of the graphene5 or carbon nanotube30. The second SA is based on WS2-PVA film, and the fabrication process can be described as follows. The as-prepared WS2 solution is ultra-sonicated for 1-hour using a 300 ...
Keywords: unipolar barrier structure, mixed-dimensional de- vice, WS2/WSe2/p-Si heterojunctions, photodetector, dark cur- rent suppression INTRODUCTION Due to their distinctive properties, including strong light-matter coupling [1,2], tunable band structure [3–5], self-passivated surface [6,7],...
Here, various perturbative corrections to the DFT electronic structure, e.g. GW, spin-orbit coupling, as well as many-body excitonic and trionic effects are considered, and accurate band gaps as a function of homogeneous biaxial strain in these materials are calculated. All of these corrections...
Solid State Phenom 37:479 Liang CH, Meng GW, Lei Y, Phillipp F, Zhang LD (2001) Catalytic growth of semiconducting In2O3 nanofibers. Adv Mater 13:1330 Martin-Litas I, Vinatier P, Levasseur A, Dupin JC, Gonbeau D (1999) XPS analysis of the lithium intercalation in amorphous tungsten...
used PBE, LDA, HSE and GW functions to calculate the band gap value of 2D-WS2, which were 1.81 eV,1.94 eV, 2.32 eV and 2.91 eV respectively [38]. Show abstract First-principles calculations to explore the oxygen effects on WS<inf>2</inf> film in marine environments 2021, Applied ...
eTshferoDmpethake stretching of C-C on the other hand bonds in graphitic corresponds to the material, breathing and is mode of six-fold aromatic rings of sp2 carbon and is activated by disorder in the graphitic structure26. The 2D band is excited by a double-resonant Raman process that, ...
Quasiparticle band structures and optical properties of strained monolayer MoS2and WS2 The quasiparticle (QP) band structures of both strainless and strained monolayer MoS2 are investigated using more accurate many-body perturbation GW theory...
shown inFig. 2(b), the D-shaped fiber SA exhibits saturable absorption property that the transmittance increases with light intensity and the modulation depth is measured as 0.95%. The saturable intensity is about 0.6 GW/cm2, which is much larger than that of the graphene5or carbon ...
Support was also provided by the US Army Research Office under MURI award W911NF-17-1-0312 (device layer transfer), and by the National Science Foundation Awards DMR-1807233 (surface preparation) and DMR-1926004 (GW calculations). S.T. acknowledges support from DOE-SC0020653, NSF DMR ...