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All papers authored by David Wallis

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2024 Chen Chen

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, Saptarsi Ghosh

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, Peter De Wolf

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, Francesca Adams

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, Menno J. Kappers

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, David J. Wallis

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, Rachel A. Oliver

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Threshold voltage mapping at the nanoscale of GaN-based high electron mobility transistor structures using hyperspectral scanning capacitance microscopy

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2023 Alexander M. Hinz

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, Saptarsi Ghosh

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, Simon M. Fairclough, James T. Griffiths, Menno J. Kappers, Rachel A. Oliver, David J. Wallis

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Strategy for reliable growth of thin GaN Caps on AlGaN HEMT structures

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Huixin Xiu

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, Simon M. Fairclough

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, Abhiram Gundimeda

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, Menno J. Kappers

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, David J. Wallis

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, Rachel A. Oliver

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, Martin Frentrup

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Polarity determination of crystal defects in zincblende GaN by aberration-corrected electron microscopy

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2022 D. J. Binks

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, D. J. Wallis

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Cubic GaN and InGaN/GaN quantum wells

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Abhiram Gundimeda

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, Martin Frentrup, Simon M. Fairclough

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, Menno J. Kappers, David J. Wallis

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, Rachel A. Oliver

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Investigation of wurtzite formation in MOVPE-grown zincblende GaN epilayers on Al_xGa_1−xN nucleation layers

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Abhiram Gundimeda

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, Mohammadreza Rostami, Martin Frentrup, Alexander Hinz, Menno J. Kappers, David J. Wallis

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, Rachel A. Oliver

Influence of Al _x Ga_1−xN nucleation layers on MOVPE-grown zincblende GaN epilayers on 3C-SiC/Si(001)

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2021 Boning Ding

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, Martin Frentrup, Simon M. Fairclough

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, Menno J. Kappers, David J. Wallis

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, Rachel A. Oliver

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Multimicroscopy of cross-section zincblende GaN LED heterostructure

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D. Dyer

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, M. Jain, M. J. Kappers, M. Frentrup, D. J. Wallis

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The effect of thermal annealing on the optical properties of Mg-doped zincblende GaN epilayers

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B. F. Spiridon, M. Toon, A. Hinz, S. Ghosh

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, S. M. Fairclough, B. J. E. Guilhabert

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, I. M. Watson, M. D. Dawson

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, D. J. Wallis

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, R. A. Oliver

Method for inferring the mechanical strain of GaN-on-Si epitaxial layers using optical profilometry and finite element analysis

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S. A. Church

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, M. Quinn

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, K. Cooley-Greene, B. Ding

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, M. J. Kappers, M. Frentrup, D. J. Wallis

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Photoluminescence efficiency of zincblende InGaN/GaN quantum wells

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Petr Vacek

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, Martin Frentrup, Lok Yi Lee

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, Fabien C.-P. Massabuau

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, Menno J. Kappers, David J. Wallis

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, Roman Gröger

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, Rachel A. Oliver

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Defect structures in (001) zincblende GaN/3C-SiC nucleation layers

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Saptarsi Ghosh

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, Alexander Hinz

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, Simon M. Fairclough, Bogdan F. Spiridon, Abdalla Eblabla, Michael A. Casbon, Menno J. Kappers, Khaled Elgaid, Saiful Alam, Rachel A. Oliver

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, David J. Wallis

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Origin(s) of Anomalous Substrate Conduction in MOVPE-Grown GaN HEMTs on Highly Resistive Silicon

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2020 Chao Sun, Fangda Wu, Yongqing Fu, David J. Wallis

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, Roman Mikhaylov, Fan Yuan, Dongfang Liang, Zhihua Xie, Hanlin Wang, Ran Tao, Ming Hong Shen, Jian Yang, Wenpeng Xun, Zhenlin Wu, Zhiyong Yang and 2 other authors

Thin film Gallium nitride (GaN) based acoustofluidic Tweezer: Modelling and microparticle manipulation

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Jerome A. Cuenca

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, Matthew D. Smith

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, Daniel E. Field, Fabien C.-P. Massabuau, Soumen Mandal, James Pomeroy

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, David J. Wallis

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, Rachel A. Oliver

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, Martin Kuball, Oliver A. Williams

Thermal stress modelling of diamond on GaN/III-Nitride membranes

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B. Ding

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, M. Frentrup, S. M. Fairclough

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, M. J. Kappers, M. Jain, A. Kovács

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, D. J. Wallis

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Alloy segregation at stacking faults in zincblende GaN heterostructures

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S. A. Church

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, B. Ding

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, P. W. Mitchell

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, M. J. Kappers, M. Frentrup, G. Kusch

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, S. M. Fairclough

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, D. J. Wallis

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Stacking fault-associated polarized surface-emitted photoluminescence from zincblende InGaN/GaN quantum wells

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E. J. W. Smith, A. H. Piracha, D. Field, J. W. Pomeroy, G. R. Mackenzie, Z. Abdallah, F. C.-P. Massabuau, A. M. Hinz, D. J. Wallis

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, R. A. Oliver, M. Kuball, P. W. May

Mixed-size diamond seeding for low-thermal-barrier growth of CVD diamond onto GaN and AlN

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Chao Sun, Fangda Wu, David J. Wallis

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, Ming Hong Shen, Fan Yuan, Jian Yang, Jianzhong Wu

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, Dongfang Liang

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, Hanlin Wang, Rowan Tickle, Roman Mikhaylov, Aled Clayton

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, You Zhou, Zhenlin Wu and 3 other authors

Gallium Nitride: A Versatile Compound Semiconductor as Novel Piezoelectric Film for Acoustic Tweezer in Manipulation of Cancer Cells

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2019 Soumen Mandal

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, Chao Yuan, Fabien Massabuau

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, James W. Pomeroy, Jerome Cuenca

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, Henry Bland, Evan Thomas, David Wallis

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, Rachel Oliver, Martin Kuball, Oliver A. Williams

Thick, Adherent Diamond Films on AlN with Low Thermal Barrier Resistance

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