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Growth of $\varepsilon-\left(\text{In}_{\mathrm{x}} \text{Ga}_{1-\mathrm{x}}\right)_{2} \mathrm{O}_{3}$ on AlN via Pulsed Laser Deposition

2025· article· W7162495530 on OpenAlex
Maria Sultana, Brian Samuels, Pallab Sarkar, Ravi Droopad, Ariful Haque

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Language
FieldMaterials Science
TopicGa2O3 and related materials
Canadian institutionsCentre for Imaging Technology Commercialization
FundersNational Science Foundation
KeywordsPulsed laser depositionDeposition (geology)Pulsed laserLaserSubstrate (aquarium)

Abstract

fetched live from OpenAlex

Ga<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> and its alloys are some of the most desirable ultra-wide bandgap semiconductors for high-power and harsh environment electronics, solar blind deep UV photodetectors, deep UV LEDs, toxic gas sensors, and highpower Schottky barrier diodes. In this research, hexagonal <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\varepsilon$</tex> (In0.15 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\left.\text{Ga}_{0.85}\right)_{2} \mathrm{O}_{3}$</tex> was successfully deposited on AIN for the very first time. The epitaxial <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">${\varepsilon}$</tex>-(In0.15Ga0.85)2O3 was deposited on wurtzite c-plane (0002) AIN via pulsed laser deposition (PLD), using optimized PLD growth parameters, including the temperature and the oxygen partial pressure. It was observed that a moderate substrate temperature of 550 °C and a relatively high PLD oxygen partial pressure of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.25 \times 10^{-2} \text{Torr}$</tex>, a laser energy density of ∼1.38 Jcm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−2</sup>, and a laser repetition rate of 2 Hz were necessary to successfully grow <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">${\varepsilon}$</tex>-(In0.15Ga0.85)2O3. The attained bandgap was 4.53 eV. X-ray photoelectron spectroscopy (XPS) high-resolution depth profile confirmed the uniform presence of indium throughout the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">${\varepsilon}$</tex>-(In0.15Ga0.85)2 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{O}_{3}$</tex> thin films. With <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sim 2500$</tex> laser pulses, the attained thickness of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\varepsilon \left(\text{In}_{0.15} \text{Ga}_{0.85}\right)_{2} \mathrm{O}_{3}$</tex> was ∼ 80 nm, confirmed by ellipsometry.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.003
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Research integrity, Insufficient payload (model declined to judge)
Consensus categoriesMeta-epidemiology (narrow), Insufficient payload (model declined to judge)
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.075
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0030.000
Meta-epidemiology (narrow)0.0020.002
Meta-epidemiology (broad)0.0030.001
Bibliometrics0.0020.002
Science and technology studies0.0010.001
Scholarly communication0.0010.002
Open science0.0020.001
Research integrity0.0020.001
Insufficient payload (model declined to judge)0.0150.003

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.006
GPT teacher head0.238
Teacher spread0.232 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

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Citations0
Published2025
Admission routes1
Has abstractyes

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