Amit Singh

Verified

Amit verified their affiliation via an institutional email.

Learn more

Verified

Amit verified their affiliation via an institutional email.

Learn more

• Doctor of Philosophy
• PhD Student at The University of Manchester

Based on density functional theory simulations, we explore the adsorption characteristics, charge transfer mechanism and electronic properties of a range of selected toxic gases on aluminium nitride (AlN) sheets with and without the external electric field. Owing to the polarization of Al-N bond, the toxic gases can be directly adsorbed by AlN on i...

The dielectric screening is one of the most fundamental properties of 2D materials which is used to characterize electronic properties such as storage capacity of charge or energy. We numerically investigate three potential heterostructures of MoS2-Graphene and their corresponding interlayer interactions. Applying a density-functional approach to t...

Traffic congestion is one of the major issues in urban areas, particularly when traffic loads exceed the road's capacity, resulting in higher petrol consumption and carbon emissions as well as delays and stress for road users. In Asia, the traffic situation can be further deteriorated by road sharing of scooters. How to control the traffic flow to...

Recent studies have reported emergent ferroelectric behavior in twisted or moir\'e-engineered graphene-based van der Waals heterostructures, yet the microscopic origin of this effect remains under debate. Pristine mono- or few-layer graphene lacks a permanent dipole due to its centrosymmetric lattice, making the emergence of ferroelectricity unlike...

Lunch is important and choosing where to have lunch is difficult. In this paper we demonstrate use of quantum randomness to find a place to eat, thus shifting the decision-making to the vacuum fluctuations of the universe. This QRLG is made publicly available.

Photoresponsivity studies of wide-bandgap oxide-based devices have emerged as a vibrant and popular research area. Researchers have explored various material systems in their quest to develop devices capable of responding to illumination. In this study, we engineered a mature wide-bandgap oxide-based bilayer heterostructure synaptic memristor to em...

Using tensor network methods, we simulate the real-time evolution of the lattice Thirring model quenched out of equilibrium in both the critical and massive phases, and study the appearance of dynamical quantum phase transitions, as non-analyticities in the Loschmidt rate. Whereas the presence of a dynamical quantum phase transition in the model do...

Photoresponsivity studies of wide-bandgap oxide-based devices have emerged as a vibrant and popular research area. Researchers have explored various material systems in their quest to develop devices capable of responding to illumination. In this study, we engineered a mature wide bandgap oxide-based bilayer heterostructure synaptic memristor to em...

In electrostatics, the electric field inside a classical conductor is zero because there are no free charges inside the conductor. Our first-principles linear response theory calculations found that conducting (metallic) one-side-hydrogenated MoS 2 with thin thickness exhibits dielectric screening behavior because it has electric polarization like...

We performed first-principles calculations to investigate hydrogen (H 2) storage properties of bare and calcium (Ca)-decorated polygon-graphenes, i.e., biphenylene and ψ-graphene monolayers consisting of polygons, from tetragons to octagons. In pristine forms, both biphenylene and ψ-graphene bind H 2 weakly. However, upon Ca doping, biphenylene ads...

A highly reliable and versatile resistive memory device that demonstrates threshold and non-volatile (NVM) switching behaviour depending on the compliance current (CC) modulation was utilised by doping a semiconducting (Si) material into a high-k (HfOx) film with highly linear synaptic behaviour. The device shifted towards volatile switching at a C...

This study investigated an oxygen-vacancy-controlled bilayer TiN/TaOy/TaOx/Pt memristive synaptic device for neuromorphic computing. Multilevel characteristics of the synaptic device were observed with RESET voltage varying between −1.4 and −1.9 V. The device shows highly stable reparative 200 potentiation and depression cycles. The high nonlineari...

In this letter, we have investigated synaptic features of a transparent bilayer memristor for neuromorphic computing applications. Our device has shown stable synaptic characteristics like potentiation and depression for repetitive 5000 epochs having 400 conductance pulses each. The device has also shown highly linear synaptic features with lineari...

We present highly stable bilayer HfO2/TiO2 memristive synapse for neuromorphic computing applications. The memristive synapse shows repetitive 220 Long-term potentiation and depression cycles without any breakdown with total number of 220k pulses. The nonlinear values of potentiation and depression are 2.52 and -2.63, respectively with 1000 conduct...

In this work, a reliable bilayer flexible memristor is demonstrated using TaOx/HfOx Bi‐layer (BL) to mimic synaptic characteristics by using oxygen concentration engineering in the oxide layers. Due to low Gibbs free energy of TaOx layer and stable properties of the single layer memristor, TaOx is inserted in the HfOx‐based memristor for making the...

A new 2D material of biphenylene sp2-bybridized carbon sheet, a nonbenzenoid carbon allotrope, has been discovered. Using first-principles calculations, we report electronic properties of the 2D biphenylene carbon sheet (BCS) with hydrogenation using first-principles calculations. We found that hydrogen atoms adsorb on carbon atoms in square, hexag...

Recently, transition metal (TM)-porphyrin-like graphene has been predicted to be a promising material for CO2 capturing under favorable conditions. Such materials can capture CO2 at 300 K and release it at 450 K. However, the captured CO2 gas is mostly stored in oceans. With the aid of first principles calculations, we herein propose a method in wh...

Artificial synapse with good linearity is a critical issue in conductive bridging random access memory (CBRAM) synaptic device to accomplish an efficient learning approach in the artificial intelligence system. In this work, we investigate a novel approach to enhance the linearity of CBRAM synapse. The linearity of a memristive synapse can be impro...

We performed density function theory calculations to study the effect of strain on electronic properties of pristine and doped graphene. A dramatic change in density of states(DOS) and band structure are observed on doped graphene in presence of uniaxial and biaxial strain. The analysis of density of states variations at Fermi level and bandgap in...

Gas sensing properties of pristine, defective and heteroatom substituted green phosphorene (GP) monolayers towards SF6 components such as H2S, SO2,SO2F2, SOF2 are investigated by using van der Waals corrected density function theory calculations. The adsorptions of H2S and SOF2 on pristine GP are found to be exothermic with weak binding energies (E...

First-principle calculations were employed to analyze the effects induced by vacancies of molybdenum (Mo) and sulfur (S) on the dielectric properties of few-layered MoS2. We explored the combined effects of vacancies and dipole interactions on the dielectric properties of few-layered MoS2. In the presence of dielectric screening, we investigated un...