William A. Callahan

Materials Science · Physical Sciences

6h-index223citations26works4.52yr avg
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Research Topics

Ga2O3 and related materials(10), ZnO doping and properties(6), Electronic and Structural Properties of Oxides(6), Semiconductor materials and devices(5), Advanced Photocatalysis Techniques(2)

Publications26 total

Unravelling Chemical Pathways of H2 on Ga2O3 surfaces with Spectro-Electrochemistry
RSC Applied Interfaces·2026Open Access
The Imperial Gaze: Affective Governance, Hybrid Cartography, and China’s U-Shaped Line
Geopolitics·2025
Epitaxial stabilization and oxygen vacancy control of EuNiO3 thin films
Journal of Applied Physics·2025Open Access
Visualizing International Politics
Oxford University Press eBooks·2025· 1 cited
Thermally induced PtOx interfacial layer enhances stability of Pt/β-Ga2O3 vertical Schottky diodes
APL Energy·2025· 2 citedOpen Access
Erratum: “Epitaxial (AlxGa1−x−yIny)2O3 alloys lattice matched to monoclinic Ga2O3 substrates” [Appl. Phys. Lett. <b>125</b>, 172106 (2024)]
Applied Physics Letters·2025
From text to test: AI-generated control software for materials science instruments
Digital Discovery·2024· 9 citedOpen Access
Epitaxial (AlxGa1−x−yIny)2O3 alloys lattice matched to monoclinic Ga2O3 substrates
Applied Physics Letters·2024· 1 citedOpen Access
From Text to Test: AI-Generated Control Software for Materials Science Instruments
arXiv (Cornell University)·2024· 1 citedOpen Access
NiGa2O4 interfacial layers in NiO/Ga2O3 heterojunction diodes at high temperature
Applied Physics Letters·2024· 18 citedOpen Access
Reliable operation of Cr2O3:Mg/β-Ga2O3 p–n heterojunction diodes at 600 °C
Applied Physics Letters·2024· 27 citedOpen Access
Reliable operation of Cr$_2$O$_3$:Mg/ $β$-Ga$_2$O$_3$ p-n heterojunction diodes at 600$^\circ$C
arXiv (Cornell University)·2024Open Access
NiGa$_{2}$O$_{4}$ interfacial layers in NiO/Ga$_{2}$O$_{3}$ heterojunction diodes at high temperature
arXiv (Cornell University)·2024Open Access
Ultrathin stable Ohmic contacts for high-temperature operation of <i>β</i>-Ga2O3 devices
Journal of Vacuum Science & Technology A Vacuum Surfaces and Films·2023· 14 citedOpen Access
Ultrathin Stable Ohmic Contacts for High-Temperature Operation of $β$-Ga$_2$O$_3$ Devices
arXiv (Cornell University)·2023Open Access
NREL's HydroGEN Photoreactor Platform Design and Characterization
2021· 1 citedOpen Access
Coupled Charge and Radiation Transport Processes in Thermophotovoltaic and Thermoradiative Cells
Physical Review Applied·2021· 37 citedOpen Access
Proceedings of the SOLAR 2021 Conference
2021Open Access
Chemical Weapons Discourse in the "South Pacific"
2020
Sensible Politics
2020· 110 cited
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Frequent Co-authors

Andriy Zakutayev(11), Kingsley Egbo(9), M. Brooks Tellekamp(6), Ryan O’Hayre(5), Cheng‐Wei Lee(4), David S. Ginley(4), Chris Chae(3), Jinwoo Hwang(3), Michelle A. Smeaton(3), Emily M. Garrity(2), Vladan Stevanović(2), Edwin Supple(2), Michael Sanders(2), Brian P. Gorman(2), Davi Fébba(2), Stephen T. Schaefer(2), Syed M. N. Hasan(2), Glenn Teeter(2), Dudong Feng(1), Zhuomin M. Zhang(1)