Negative capacitance in ferroelectric heterostructures
Negative capacitance can enable ultralow-power field effect transistors, though the concept of ferroelectric negative capacitance, especially its stability, remains contentious.
Negative capacitance can enable ultralow-power field effect transistors, though the concept of ferroelectric negative capacitance, especially its stability, remains contentious.
Intrinsic Nature of Negative Capacitance in Multidomain Hf0.5Zr0.5O2 ... ... of, ...
2 Results and Discussion. Layered α-MoO 3 nanobelts were prepared by hydrothermal method. [] It is highly crystalline with 15–20 µm in length and a width of about 200 nm (Figure S1, Supporting Information).The …
1 Introduction. Two-dimensional (2D) nanostructures feature a atomically thin geometry in thickness and a ultrahigh surface-to-volume ratio compared to other dimensional nanomaterials (Figure 1a).[1, 2] Generally, a monolayer in a 2D-layered materials is composed of an atom …
The practical application of 2D transition metal dichalcogenides (TMDs) requires robust and scalable synthesis of these atomically thin materials and their heterostructures. This Review discusses ...
Under framework of first-principles calculation, we construct ZrS 2 /ZrSe 2 heterostructure and explore the effects of the uniaxial and biaxial strains on its electronic and optical properties. Band structure shows the unstrained ZrS 2 /ZrSe 2 heterostructure has a type-II band alignment. The large binding energy and small interface distance indicate there is a …
Introduction. Photodetectors, which can capture light signals and convert them into electric outputs, are fundamental devices for modern imaging and communication applications 1 – 3.With the development of photoactive materials and integration technologies, the maturity in functional diversity and production scale of photodetectors has reached a high level.
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The "magic" mixture of AlGaAs was found in researchers in St. Petersburg and gave this group, headed by Alferov, a strong position in the implementation of solid-state optoelectronics, such …
Vertical stacking of two-dimensional (2D) crystals, such as graphene and hexagonal boron nitride, has recently lead to a new class of materials known as van der Waals heterostructures (vdWHs) with ...
ARTICLE Rational design of Al 2O 3/2D perovskite heterostructure dielectric for high performance MoS 2 phototransistors Jiayang Jiang1, Xuming Zou 1, Yawei Lv1, Yuan Liu 1, Weiting Xu1, Quanyang ...
Ladeinfrastruktur og energilagring i batterier er en forutsetning for rask omstilling av samfunnet til grønn energi og lavere CO2-utslipp, og blir en viktig del av fremtidens energisystem. I SINTEF …
We investigate numerically and experimentally the optical properties of the transverse electric (TE) waves supported by a dielectric-metal heterostructure. They are considered as the counterparts of the surface plasmon polaritons (i.e., the transverse magnetic (TM) waves) which have been extensively studied in the last several decades. We show that TE waves with …
GaAs-AlGaAs (Abb. 12.2a) bildet eine normale Typ-I-Heterostruktur, in Abb. 12.2b, c sind Beispiele für Typ-II-Heterostrukturen gezeigt. Mit Heterostrukturen lassen sich …
Electronic Properties. Figure 2a and b shows the pristine Sn and BeO monolayer band structures, from which it can be seen that the pristine Sn has a zero band gap. Similarly, the BeO monolayer shows a large insulator-like band gap of 5 eV. Figure 2c shows the band structure of the Sn-BeO heterostructure for both PBE and HSE06 hybrid functionals. For …
Prosjekter for bruk av batterier til energilagring i kraftnettet er økende i Europa. Batterier er en viktig del av strømforbruket og dagliglivet til folk over hele verden. Batterier er …
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where C ma and G ma are the measured C and G for any biased voltage and ω is the angular frequency. Figure 3a,b, show the R s –V plots determined from Eq. 1 is observed from Fig. 3a that R s ...
We demonstrate room-temperature negative capacitance in a ferroelectric-dielectric superlattice heterostructure. In epitaxially grown superlattice of ferroelectric BSTO (Ba0.8Sr0.2TiO3) and dielectric LAO (LaAlO3), capacitance was found to be larger compared to the constituent LAO (dielectric) capac …
Phase-pure perovskite structure Pb(Zr, Ti)O3 (PZT) thin films are successfully prepared on FTO/glass substrate via magnetron sputtering process, acting as buffer layers for the sol–gel-derived BiFeO3 (BFO) thin film. The existence of compressive strain of PZT buffer layer with various thicknesses was demonstrated through qualitative analysis, which can make the Gibbs …
Observing interfacial molecular adsorption and desorption dynamics in a label-free manner is fundamentally important for understanding spatiotemporal transports of matter and energy across interfaces.
Author(s): Jiang, Jiayang; Zou, Xuming; Lv, Yawei; Liu, Yuan; Xu, Weiting; Tao, Quanyang; Chai, Yang; Liao, Lei | Abstract: Two-dimensional (2D) Ruddlesden-Popper perovskites are currently drawing significant attention as highly-stable photoactive materials for optoelectronic applications. However, the insulating nature of organic ammonium layers in 2D perovskites results in poor …
Heterostructures of van der Waals bonded layered materials offer unique means to tailor dielectric screening with atomic-layer precision, opening a fertile field of fundamental research. The optical analyses used so far have relied on interband spectroscopy. Here we demonstrate how a capping layer of hexagonal boron nitride (hBN) renormalizes the internal structure of excitons in a …
Type I. Due to fact that band alignment promotes electron–hole (e − −h +) recombination, luminous devices including such LEDs can be employed [9, 10].Type II. The type II band …
Two-dimensional (2D) Ruddlesden-Popper perovskites are currently drawing significant attention as highly-stable photoactive materials for optoelectronic applications. However, the insulating nature of organic ammonium layers in 2D perovskites results in poor charge transport and limited performance. Here, we demonstrate that Al2O3/2D perovskite heterostructure can be utilized …
Purchased MoS 2 monolayers (Six Carbon Technology) on a double-sided polished sapphire substrate grown by chemical vapor deposition are used as received. SiO 2 microspheres are transferred to MoS 2 monolayers by dropping and drying aqueous solution of SiO 2 microspheres. First of all, optical absorptance and photoluminescence (PL) spectra of …
Magnetoelectric composites and heterostructures integrate magnetic and dielectric materials to produce new functionalities, e.g., magnetoelectric responses that are absent in each of the ...
Al2O3/2D perovskite heterostructure can be utilized as photoactive dielectric for high-performance MoS2 phototransistors with broadband photoresponse, high photogain and reliability operation. Two-dimensional (2D) Ruddlesden-Popper perovskites are currently drawing significant attention as highly-stable photoactive materials for optoelectronic applications. However, the insulating …
The calculations are conducted with the density functional theory (DFT) and the projector augmented-wave method implemented in the Vienna Ab initio Simulation Package (VASP) [35, 36].The exchange-correlation potential is taken as the Perdew–Burke–Ernzerhof (PBE) functional [].A cutoff energy of 550 eV is adopted for the plane wave basis set.
a) Schematic of three-terminal vdWH Fe-FET device fabricated with CuInP 2 S 6, h-BN, and α-In 2 Se 3.b) Optical image of vdWH Fe-FET device based on α-In 2 Se 3 /h-BN/CIPS heterostructure. c) Thickness profile of α-In 2 Se 3 (52 nm)/h-BN (6 nm)/CIPS (84 nm) heterostructure. The thickness was measured along the gold line in b).