39 citations · 167 across the 17 of their papers we have counts for
18 papers
In Situ Thermal Preparation by CO-Laser and Chemical Characterization of Oxide Substrates Across Multiple Crystallographic Orientations
Neethu Rose Leyo, Sethulakshmi Sajeev, Arnaud P. Nono Tchiomo +1
Atomically flat and chemically controlled oxide substrate surfaces are essential for high-quality epitaxial growth of complex materials and heterostructures. Previous studies have…
Electronic Structure of Epitaxial Films of the Bilayer Strontium Ruthenate: SrRuO
Sethulakshmi Sajeev, Arnaud P. Nono Tchiomo, Brendan D. Faeth +10
We report a combined study of the low-energy electronic band structure of epitaxial SrRuO films using angle-resolved photoemission spectroscopy (ARPES) and density func…
Unveiling the Interfacial Reconstruction Mechanism Enabling Stable Growth of the Delafossite PdCoO2 on Al2O3 and LaAlO3
Anna Scheid, Tobias Heil, Y. Eren Suyolcu +7
Delafossites, comprised of noble metal (A+) and strongly correlated sublayers (BO2-), form natural superlattices with highly anisotropic properties. These properties hold significa…
Magnetotransport Properties in Epitaxial Films of Metallic Delafossite PdCoO: Effects of Thickness and Width Variations in Hall Bar Devices
Arnaud P. Nono Tchiomo, Anand Sharma, Sethulakshmi Sajeev +4
We report on a combined structural and magnetotransport study of Hall bar devices of various lateral dimensions patterned side-by-side on epitaxial PdCoO thin films. We study t…
Epitaxial Films and Devices of Transparent Conducting Oxides: La:BaSnO
Prosper Ngabonziza, Arnaud P. Nono Tchiomo
This paper reviews recent developments in materials science and device physics of high-quality epitaxial films of the transparent perovskite La-doped barium stannate, La:BaSnO.…
Magnetotransport Properties of Epitaxial Films and Hall Bar Devices of the Correlated Layered Ruthenate SrRuO
Prosper Ngabonziza, Anand Sharma, Anna Scheid +3
For epitaxial SrRuO films grown by pulsed laser deposition, we report a combined structural and magnetotransport study of thin films and Hall bar devices patterned side…
Layer-dependent spin-resolved electronic structure of ferromagnetic triple-layered ruthenate SrRuO
Prosper Ngabonziza, Jonathan D. Denlinger, Alexei V. Fedorov +4
High-resolution angle- and spin-resolved photoemission spectroscopy (ARPES) of the triple-layered ruthenate SrRuO reveals features of the electronic structure that e…
Employing High-temperature-grown SrZrO Buffer to Enhance the Electron Mobility in La:BaSnO-based Heterostructures
Prosper Ngabonziza, Jisung Park, Wilfried Sigle +3
We report a synthetic route to achieve high electron mobility at room temperature in epitaxial La:BaSnO/SrZrO heterostructures prepared on several oxide substrates. Room-te…
Combined Spectroscopy and Electrical Characterization of La:BaSnO Thin Films and Heterostructures
Arnaud P. Nono Tchiomo, Emanuela Carleschi, Aletta R. E. Prinsloo +5
For La-doped BaSnO thin films grown by pulsed laser deposition, we combine chemical surface characterization and electronic transport studies to probe the evolution of e…
Electronic Structure and Magnetism of the Triple-layered Ruthenate SrRuO
G. Gebreyesus, Prosper Ngabonziza, Jonah Nagura +3
We report electronic band structure calculations for SrRuO that displays both ferromagnetic and metamagnetic behavior. The density functional calculations find t…
Quantum Transport and Potential of Topological States for Thermoelectricity in BiTe Thin Films
Prosper Ngabonziza
This paper reviews recent developments in quantum transport and it presents recent efforts to explore the contribution of topological insulator boundary states to thermoelectricity…
Inelastic Electron Tunneling Spectroscopy at High-Temperatures
Prosper Ngabonziza, Yi Wang, Peter A. van Aken +2
Ion conducting materials are critical components of batteries, fuel cells, and devices such as memristive switches. Analytical tools are therefore sought that allow the behavior of…
Fermi surface and kink structures in SrRuO revealed by synchrotron-based ARPES
Prosper Ngabonziza, Emanuela Carleschi, Volodymyr Zabolotnyy +7
The low-energy electronic structure, including the Fermi surface topology, of the itinerant metamagnet SrRuO is investigated for the first time by synchrotron-ba…
Josephson Effect and Charge Distribution in Thin BiTe Topological Insulators
Martin P. Stehno, Prosper Ngabonziza, Hiroaki Myoren +1
Thin layers of topological insulator materials are quasi-two-dimensional systems featuring a complex interplay between quantum confinement and topological band structure. To unders…
High-temperature-grown buffer layer boosts electron mobility in epitaxial La-doped BaSnO/SrZrO heterostructures
Arnaud P. Nono Tchiomo, Wolfgang Braun, Bryan P. Doyle +4
By inserting a SrZrO buffer layer between the film and the substrate, we demonstrate a significant reduction of the threading dislocation density with an associated improvement…
Bulk contribution to magnetotransport properties of low defect-density BiTe topological insulator thin films
Prosper Ngabonziza, Yi Wang, Alexander Brinkman
An important challenge in the field of topological materials is to carefully disentangle the electronic transport contribution of the topological surface states from that of the bu…
Gate-tunable transport properties of in-situ capped BiTe topological insulator thin films
Prosper Ngabonziza, Martin P. Stehno, Hiroaki Myoren +3
Combining the ability to prepare high-quality, intrinsic BiTe topological insulator thin films of low carrier density with in-situ protective capping, we demonstrate a pron…
Magnetoresistance from broken spin helicity
D. P. Leusink, R. G. J. Smits, P. Ngabonziza +4
The propensity of some materials and multilayers to have a magnetic field dependent resistance, called magnetoresistance, has found commercial applications such as giant magnetores…