STM-induced desorption and lithographic patterning of Cl–Si (100)-(2× 1)

KJ Dwyer, M Dreyer, RE Butera - The Journal of Physical …, 2019 - ACS Publications
A scanning tunneling microscope (STM) was used to investigate tip-induced chlorine
desorption and lithographic patterning of Cl-terminated Si (100)-(2× 1) surfaces from 4 to …

Scanning tunneling microscope control: A self-tuning PI controller based on online local barrier height estimation

F Tajaddodianfar, SOR Moheimani… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
We identify the dynamics of a scanning tunneling microscope (STM) in closed loop and
show that the plant dc gain is proportional to the square root of local barrier height (LBH), a …

[HTML][HTML] On the effect of local barrier height in scanning tunneling microscopy: Measurement methods and control implications

F Tajaddodianfar, SO Moheimani, J Owen… - Review of Scientific …, 2018 - pubs.aip.org
A common cause of tip-sample crashes in a Scanning Tunneling Microscope (STM)
operating in constant current mode is the poor performance of its feedback control system …

Strain and electric field control of hyperfine interactions for donor spin qubits in silicon

M Usman, CD Hill, R Rahman, G Klimeck… - Physical Review B, 2015 - APS
Control of hyperfine interactions is a fundamental requirement for quantum computing
architecture schemes based on shallow donors in silicon. However, at present, there is …

Mechatronic control and modeling of a piezoelectric actuator

S Touairi, Y Khouya, C Bahanni… - 2019 International …, 2019 - ieeexplore.ieee.org
In this work, we present a detailed description of a mechatronic modeling and control of a
piezoelectric actuator for a scanning tunneling microscopy (STM). Existing work on a …

Sliding-mode control of piezoelectric actuator using bond graph

S TOUAIRI, Y KHOUYA, C BAHANNI… - 2019 5th International …, 2019 - ieeexplore.ieee.org
In this document, we concept a sliding mode control based on the Bond Graph approach, for
an active current-distance between the Tip and Sample in our scanning system (STM) …

Stability analysis of a scanning tunneling microscope control system

F Tajaddodianfar, SOR Moheimani… - 2017 American …, 2017 - ieeexplore.ieee.org
Control system of a Scanning Tunneling Microscope is analyzed. For the aim of model-
based control system analysis and design, open-loop model of the plant is obtained based …

Constant di/dz scanning tunneling microscopy: Atomic precision imaging and hydrogen depassivation lithography on a Si (100)-2× 1: H surface

R Mishra, SO Moheimani - Review of Scientific Instruments, 2025 - pubs.aip.org
We introduce a novel control mode for Scanning Tunneling Microscope (STM) that
leverages di/dz feedback. By superimposing a high-frequency sinusoidal modulation on the …

Valley population of donor states in highly strained silicon

B Voisin, KSH Ng, J Salfi, M Usman… - Materials for …, 2022 - iopscience.iop.org
Strain is extensively used to controllably tailor the electronic properties of materials. In the
context of indirect band-gap semiconductors such as silicon, strain lifts the valley …

Atomic-layer doping of SiGe heterostructures for atomic-precision donor devices

E Bussmann, JK Gamble, JC Koepke, D Laroche… - Physical Review …, 2018 - APS
As a first step to porting scanning tunneling microscopy methods of atomic-precision
fabrication to a strained-Si/SiGe platform, we demonstrate post-growth P atomic-layer …