111 citations · 568 across the 40 of their papers we have counts for
40 papers
Demonstration of High-Performance Ultra-Wide Bandgap SrSnO Top-Gated MOSFETs
Junghyun Koo, Weideng Sun, Donghwan Kim +6
We report the demonstration of high-performance top-gated metal-oxide-semiconductor field-effect transistors (MOSFETs) based on the ultra-wide bandgap perovskite oxide SrSnO (S…
High-Mobility Carriers in Epitaxial IrO2 Films Grown using Hybrid Molecular Beam Epitaxy
Sreejith Nair, Zhifei Yang, Kevin Storr +1
Binary rutile oxides of 5d metals such as IrO2, stand out as a paradox due to limited experimental studies despite the rich predicted quantum phenomena. Here, we investigate the el…
Epitaxially Grown Single-Crystalline SrTiO3 Membranes Using a Solution-Processed, Amorphous SrCa2Al2O6 Sacrificial Layer
Shivasheesh Varshney, Martí Ramis, Sooho Choo +2
Water-soluble sacrificial layers based on epitaxially-grown, single crystalline (Ca, Sr, Ba)3Al2O6 layer are widely used for creating free-standing perovskite oxide membranes. Howe…
Deep-ultraviolet transparent conducting SrSnO3 via heterostructure design
Fengdeng Liu, Zhifei Yang, David Abramovitch +4
Exploration and advancements in ultra-wide bandgap (UWBG) semiconductors are pivotal for next-generation high-power electronics and deep-ultraviolet (DUV) optoelectronics. A critic…
Altermagnetic Polar Metallic phase in Ultra-Thin Epitaxially-Strained RuO2 Films
Seung Gyo Jeong, In Hyeok Choi, Sreejith Nair +12
Altermagnetism refers to a wide class of magnetic orders featuring magnetic sublattices with opposite spins related by rotational symmetries, resulting in non-trivial spin splittin…
Anomalous frequency and temperature dependent scattering in the dilute metallic phase in lightly doped-SrTiO
K. Santhosh Kumar, Dooyong Lee, Shivasheesh Varshney +2
The mechanism of superconductivity in materials with aborted ferroelectricity and the emergence of a dilute metallic phase in systems like doped-SrTiO are outstanding issues in…
Site-Specific Plan-view (S)TEM Sample Preparation from Thin Films using a Dual-Beam FIB-SEM
Supriya Ghosh, Fengdeng Liu, Sreejith Nair +2
Plan-view transmission electron microscopy (TEM) samples are key to understand the atomic structure and associated properties of materials along their growth orientation, especiall…
Thickness-dependent insulator-to-metal transition in epitaxial RuO2 films
Anil Kumar Rajapitamahuni, Sreejith Nair, Zhifei Yang +4
Epitaxially grown RuO2 films on TiO2 (110) exhibit significant in-plane strain anisotropy, with a compressive strain of - 4.7% along the [001] crystalline direction and a tensile s…
Fast and Facile Synthesis Route to Epitaxial Oxide Membrane Using a Sacrificial Layer
Shivasheesh Varshney, Sooho Choo, Liam Thompson +7
The advancement in thin-film exfoliation for synthesizing oxide membranes has opened up new possibilities for creating artificially-assembled heterostructures with structurally and…
Effect of Pt vacancies on magnetotransport of Weyl semimetal candidate GdPtSb epitaxial films
Dongxue Du, Laxman Raju Thoutam, Konrad T. Genser +5
We examine the effects of Pt vacancies on the magnetotransport properties of Weyl semimetal candidate GdPtSb films, grown by molecular beam epitaxy on c-plane sapphire. Rutherford…
Mending Cracks in Rutile TiO with Electron Beam
Silu Guo, Hwanhui Yun, Sreejith Nair +2
Restructuring of rutile TiO under electron beam irradiation driven by radiolysis was observed and analyzed using a combination of atomic-resolution imaging and electron energ…
Free-Standing Epitaxial SrTiO Nanomembranes via Remote Epitaxy using Hybrid Molecular Beam Epitaxy
Hyojin Yoon, Tristan K. Truttmann, Fengdeng Liu +12
The epitaxial growth of functional materials using a substrate with a graphene layer is a highly desirable method for improving structural quality and obtaining free-standing epita…
Hybrid Molecular Beam Epitaxy of Ge-based Oxides
Fengdeng Liu, Tristan K Truttmann, Dooyong Lee +6
Germanium-based oxides such as rutile GeO2 are garnering attention owing to their wide band gaps and the prospects for ambipolar doping for application in high-power devices. Here,…
Anomalous Transport in High-Mobility Superconducting SrTiO Thin Films
Jin Yue, Yilikal Ayino, Tristan K. Truttmann +9
The study of subtle effects on transport in semiconductors requires high-quality epitaxial structures with low defect density. Using hybrid molecular beam epitaxy (MBE), SrTiO…
Hysteretic Magnetoresistance in a Non-Magnetic SrSnO3 Film via Thermal Coupling to Dynamic Substrate Behavior
Laxman Raju Thoutam, Tristan K. Truttmann, Anil Kumar Rajapitamahuni +1
Hysteretic magnetoresistance (MR) is often used as a signature of ferromagnetism in conducting oxide thin films and heterostructures. Here, magnetotransport is investigated in a no…
Solid Source Metal-Organic Molecular Beam Epitaxy of Epitaxial RuO2
William Nunn, Sreejith Nair, Hwanhui Yun +5
A seemingly simple oxide with a rutile structure, RuO2 has been shown to possess several intriguing properties ranging from strain-stabilized superconductivity to a strong catalyti…
Growth and characterization of large (Y,La)TiO and (Y,Ca)TiO single crystals
S. Hameed, J. Joe, L. R. Thoutam +12
The Mott-insulating rare-earth titanates (RTiO, R being a rare-earth ion) are an important class of materials that encompasses interesting spin-orbital phases as well as ferrom…
Direct observation and consequences of dopant segregation inside and outside dislocation cores in perovskite BaSnO3
Hwanhui Yun, Abhinav Prakash, Turan Birol +2
Distinct dopant behaviors inside and outside dislocation cores are identified by atomic-resolution electron microscopy in perovskite BaSnO3 with considerable consequences on local…
Surface state at evidenced by angle-resolved photoemission spectroscopy and ab initio calculations
Muntaser Naamneh, Abhinav Prakash, Eduardo B. Guedes +5
Perovskite alkaline earth stannates, such as and , showing light transparency and high electrical conductivity (when doped), have become promising candidates for…
Strain Relaxation via Phase Transformation in SrSnO3
Tristan K Truttmann, Fengdeng Liu, Javier Garcia Barriocanal +2
SrSnO3 (SSO) is an emerging ultra-wide bandgap (UWBG) semiconductor with potential for highpower applications. In-plane compressive strain was recently shown to stabilize the high…
Impurity Band Conduction in Si-doped \b{eta}-Ga2O3 Films
Anil Kumar Rajapitamahuni, Laxman Raju Thoutam, Praneeth Ranga +2
By combining temperature-dependent resistivity and Hall effect measurements, we investigate donor state energy in Si-doped \b{eta}-Ga2O3 films grown using metal-organic vapor phase…
Self-Assembled Periodic Nanostructures Using Martensitic Phase Transformations
Abhinav Prakash, Tianqi Wang, Ashley Bucsek +11
We describe a novel approach for the rational design and synthesis of self-assembled periodic nanostructures using martensitic phase transformations. We demonstrate this approach i…
Precursor Selection in Hybrid Molecular Beam Epitaxy of Alkaline-Earth Stannates
Abhinav Prakash, Tianqi Wang, Rashmi Choudhary +3
One of the challenges of oxide molecular beam epitaxy (MBE) is the synthesis of oxides containing metals with high electronegativity (metals that are hard to oxidize). The use of r…
Electronic Structure and Small Hole Polarons in YTiO3
Jin Yue, Nicholas F. Quackenbush, Iflah Laraib +10
As a prototypical Mott insulator with ferromagnetic ordering, YTiO3 (YTO) is of great interest in the study of strong electron correlation effects and orbital ordering. Here we rep…