First-principles study of oxygen vacancy defects in orthorhombic Hf0. 5Zr0. 5O2/SiO2/Si gate stack

J Chai, H Xu, J Xiang, Y Zhang, L Zhou… - Journal of Applied …, 2022 - pubs.aip.org
The gate defect of the ferroelectric HfO 2-based Si field-effect transistor (Si FeFET) plays a
dominant role in its reliability issue. The first-principles calculations are an effective method …

Gas sensing properties of CNT-BNNT-CNT nanostructures: A first principles study

SS Vedaei, E Nadimi - Applied Surface Science, 2019 - Elsevier
The sensing properties of CNT-BNNT-CNT heterostructures toward NO 2, O 2 and H 2 O has
been theoretically investigated applying first principles density function theory in …

Dynamic observation of oxygen vacancies in hafnia layer by in situ transmission electron microscopy

C Li, Y Yao, X Shen, Y Wang, J Li, C Gu, R Yu, Q Liu… - Nano Research, 2015 - Springer
The charge-trapping process, with HfO 2 film as the charge-capturing layer, has been
investigated by using in situ electron energy-loss spectroscopy and in situ energy-filter …

Band offset and leakage current in fluorine doped Si/HfO2/SiO2 gate stack of metal oxide semiconductor field effect transistors: An ab initio investigation

E Nadimi, A Rahimi, S Masoumi, M Schreiber - Thin Solid Films, 2022 - Elsevier
Ab initio calculations were employed to investigate the influence of Fluorine doping in the
gate dielectric stacks of state-of-the-art metal-oxide-semiconductor field-effect transistors …

Defect generation and activation processes in HfO2 thin films: Contributions to stress‐induced leakage currents

R Öttking, S Kupke, E Nadimi, R Leitsmann… - … status solidi (a), 2015 - Wiley Online Library
An important source of degradation in thin dielectric material layers is the generation and
migration of oxygen vacancies. We investigated the formation of Frenkel pairs (FPs) in HfO2 …

Total ionizing dose response of hafnium-oxide based MOS devices to low-dose-rate gamma ray radiation observed by pulse CV and on-site measurements

Y Mu, CZ Zhao, Q Lu, C Zhao, Y Qi… - … on Nuclear Science, 2016 - ieeexplore.ieee.org
This paper reports on the low-dose-rate radiation response of Al-HfO 2/SiO 2-Si MOS
devices, where the gate dielectric was formed by atomic layer deposition with 4.7 nm …

Hysteresis in lanthanide zirconium oxides observed using a pulse CV technique and including the effect of high temperature annealing

Q Lu, C Zhao, Y Mu, CZ Zhao, S Taylor, PR Chalker - Materials, 2015 - mdpi.com
A powerful characterization technique, pulse capacitance-voltage (CV) technique, was used
to investigate oxide traps before and after annealing for lanthanide zirconium oxide thin films …

Effects of biased irradiation on charge trapping in HfO2 dielectric thin films

Y Mu, CZ Zhao, Q Lu, C Zhao, Y Qi, S Lam… - AIP Conference …, 2017 - pubs.aip.org
This paper reports the low-dose-rate radiation response of Al-HfO2/SiO2–Si MOS devices, in
which the gate dielectric was formed by atomic layer deposition (ALD) with 5-nm equivalent …

High-k gate stacks influence on characteristics of nano-scale MOSFET structures

KO Petrosyants, DA Popov - 2nd International Conference on …, 2015 - atlantis-press.com
The models of electro-physical effects built-into Sentaurus TCAD have been tested. The
models providing an adequate modeling of deep submicron high-k MOSFETs have been …

Modeling the effects of lanthanum, nitrogen, and fluorine treatments of Si-SiON-HfO2-TiN gate stacks in 28 nm high-k-metal gate technology

R Leitsmann, F Lazarevic, M Drescher… - Journal of Applied …, 2017 - pubs.aip.org
We have carried out a combined experimental and theoretical study on the influence of
lanthanum, nitrogen, and fluorine treatments on the electric properties of high-k metal gate …