Two-dimensional transition metal dichalcogenides (TMDCs) demonstrate great potential in nanoelectronics devices owing to their high carrier mobility the atomically thin channel regime. However, contact resistance between source/drain electrodes and TMDC channels hinders TMDCs applications very-large-scale integration (VLSI) field. Here, this work reports aligned van der Waals (vdW) junction fab...

Stokes and anti-Stokes Raman scattering are performed on atomic layers of hexagonal molybdenum ditelluride (MoTe2), a prototypical transition metal dichalcogenide (TMDC) semiconductor. The data reveal all six types of zone center optical phonons, along with their corresponding Davydov splittings, which have been challenging to see in other TMDCs. We discover that the anti-Stokes Raman intensity...

Hybrids of graphene and two-dimensional transition-metal dichalcogenides (TMDCs) have the potential to bring graphene spintronics to the next level. As we show here by performing first-principles calculations of graphene on monolayer MoS2, there are several advantages of such hybrids over pristine graphene. First, Dirac electrons in graphene exhibit a giant global proximity spin-orbit coupling,...

Monolayer transition metal dichalcogenides (TMDCs) grown by chemical vapor deposition (CVD) are plagued by a significantly lower optical quality compared to exfoliated TMDCs. In this work, we show that the optical quality of CVD-grown MoSe2 is completely recovered if the material is sandwiched in MoS2/MoSe2/MoS2 trilayer van der Waals heterostructures. We show by means of density functional the...

Abstract Superacids are strong acids with an acidity higher than pure sulfuric acid. Recently, superacid treatment of monolayer transition metal dichalcogenide (TMDC) flakes, such as MoS 2 and WS , has shown a dramatic enhancement optical properties, photoluminescence (PL) intensity. The molecule is bis(trifluoromethane)sulfonimide (TFSI). In this review paper, we summarize discuss the recent w...

Bu çal??mada a??rl?kl? olarak güncel çift-kutuplu alan etkili transistör üzerinde duruldu. Cift-kutup, son y?llarda birçok uygulama için önemli hale geldi. Literatürde cift-kutupa neden olan faktör bildirilmi?tir. Bununla birlikte, iki kutuplulu?un nedenleri literatürde tam ara?t?r?lmam??t?r. çal??mada, çift kutupluluk derecesi, WS2 FET cihaz? kanal kal?nl???n?n bir fonksiyonu belirlenmi?tir. K...

به‌منظور تحلیل نوترونیک قلب رآکتورها، نیاز به توسعه نرم‌افزارهای محاسبات هسته‌ای جهت تولید ثابت‌های چند گروهی و حل عددی معادله پخش است. برای این منظور، از روش‌هایی استفاده می‌شود که علاوه بر دقت مناسب حجم زمان بهینه‌ای برخوردار باشند. در پژوهش تئوری حاکم روش نودال بسط شار جریان متوسط هم‌چنین مرتبه‌های بالاتر پرداخته می‌شود. پس‌ازآن با گسسته‌سازی نوترون، نشان داده روش‌ بهینه خوبی بهره می‌برد. مس...

${\mathrm{NbSe}}_{2}$ is one of metallic two-dimensional (2D) transition-metal dichalcogenide (TMDC) materials. Because broken crystal inversion symmetry, large spin splitting induced by Ising-type spin-orbit coupling in odd-number-layered ${\mathrm{NbSe}}_{2}$, but absent for even-number-layered with the symmetry. In this paper we numerically calculate nonlinear optical charge and Hall conduct...

Transition metal dichalcogenides (TMDC) have been considered promising electronic materials in recent years. Annealing and chemical doping are two core processes used manufacturing devices to modify properties improve device performance, where annealing enhances crystal quality, reduces defects, carrier mobility, while modifies conductivity introduces new energy levels within the bandgap. In th...