Defect identification in semiconductors with positron annihilation:<? format?> Experiment and theory

F Tuomisto, I Makkonen - Reviews of Modern Physics, 2013 - APS
Positron annihilation spectroscopy is particularly suitable for studying vacancy-type
defects<? format?> in semiconductors. Combining state-of-the-art experimental and …

Site-controlled and advanced epitaxial Ge/Si quantum dots: Fabrication, properties, and applications

M Brehm, M Grydlik - Nanotechnology, 2017 - iopscience.iop.org
In this review, we report on fabrication paths, challenges, and emerging solutions to
integrate group-IV epitaxial quantum dots (QDs) as active light emitters into the existing …

[HTML][HTML] Enhancement of vacancy diffusion by C and N interstitials in the equiatomic FeMnNiCoCr high entropy alloy

E Lu, J Zhao, I Makkonen, K Mizohata, Z Li, M Hua… - Acta Materialia, 2021 - Elsevier
We present evidence of homogenization of atomic diffusion properties caused by C and N
interstitials in an equiatomic single-phase high entropy alloy (FeMnNiCoCr). This …

[HTML][HTML] Direct observation of mono-vacancy and self-interstitial recovery in tungsten

J Heikinheimo, K Mizohata, J Räisänen, T Ahlgren… - APL Materials, 2019 - pubs.aip.org
Reliable and accurate knowledge of the physical properties of elementary point defects is
crucial for predictive modeling of the evolution of radiation damage in materials employed in …

[HTML][HTML] On the nature of as-grown and irradiation-induced Ga vacancy defects in β-Ga2O3

I Zhelezova, I Makkonen, F Tuomisto - Journal of Applied Physics, 2024 - pubs.aip.org
We have applied positron annihilation spectroscopy to study the vacancy-type defects in β-
Ga 2 O 3 single crystals. The three different types of crystals were prepared by Czochralski …

Vacancy complexes in nonequilibrium germanium-tin semiconductors

S Assali, M Elsayed, J Nicolas, MO Liedke… - Applied Physics …, 2019 - pubs.aip.org
Depth-profiled pulsed low-energy positron annihilation lifetime spectroscopy and Doppler
broadening spectroscopy were combined to identify vacancy-related complexes and probe …

Dangling bonds and vacancies in germanium

JR Weber, A Janotti, CG Van de Walle - Physical Review B—Condensed …, 2013 - APS
The quest for metal-oxide-semiconductor field-effect transistors (MOSFETs) with higher
carrier mobility has triggered great interest in germanium-based MOSFETs. Still, the …

Advanced techniques for characterization of ion beam modified materials

Y Zhang, A Debelle, A Boulle, P Kluth… - Current Opinion in Solid …, 2015 - Elsevier
Understanding the mechanisms of damage formation in materials irradiated with energetic
ions is essential for the field of ion-beam materials modification and engineering. Utilizing …

Native point defects in GaSb

J Kujala, N Segercrantz, F Tuomisto… - Journal of Applied …, 2014 - pubs.aip.org
We have applied positron annihilation spectroscopy to study native point defects in Te-
doped n-type and nominally undoped p-type GaSb single crystals. The results show that the …

Evolution of point defects in pulsed-laser-melted Ge1-x Sn x probed by positron annihilation lifetime spectroscopy

O Steuer, MO Liedke, M Butterling… - Journal of Physics …, 2023 - iopscience.iop.org
Abstract Direct-band-gap Germanium-Tin alloys (Ge 1-x Sn x) with high carrier mobilities are
promising materials for nano-and optoelectronics. The concentration of open volume defects …