776 citations · 1.1k across the 11 of their papers we have counts for
11 papers
Atomic scale visualization of topological spin textures in the chiral magnet MnGe
Jacob Repicky, Po-Kuan Wu, Tao Liu +8
Spin polarized scanning tunneling microscopy is used to directly image topological magnetic textures in thin films of MnGe, and to correlate the magnetism with structure probed at…
Anisotropic Magnetoresistance and Nontrivial Spin Hall Magnetoresistance in Pt/-FeO Bilayers
Yang Cheng, Sisheng Yu, Adam S. Ahmed +3
To date, magnetic proximity effect (MPE) has only been conclusively observed in ferromagnet (FM) based systems. We report the observation of anomalous Hall effect and anisotropic m…
Spin-Hall Topological Hall Effect in Highly Tunable Pt/Ferrimagnetic-Insulator Bilayers
Adam S. Ahmed, Aidan J. Lee, Nuria Bagués +8
Electrical detection of topological magnetic textures such as skyrmions is currently limited to conducting materials. While magnetic insulators offer key advantages for skyrmion te…
Surface Structures of Epitaxial B20 FeGe(-1-1-1) Thin Films via Scanning Tunneling Microscopy
J. P. Corbett, T. Zhu, A. S. Ahmed +5
We grew 20-100 nm thick films of B20 FeGe by molecular beam epitaxy and investigated the surface structures via scanning tunneling microscopy. We observed the atomic resolution of…
Room Temperature Intrinsic Ferromagnetism in Epitaxial Manganese Selenide Films in the Monolayer Limit
Dante J. O'Hara, Tiancong Zhu, Amanda H. Trout +9
Monolayer van der Waals (vdW) magnets provide an exciting opportunity for exploring two-dimensional (2D) magnetism for scientific and technological advances, but the intrinsic ferr…
Magnetic Proximity Effect in Pt/CoFe2O4 Bilayers
Walid Amamou, Igor V. Pinchuk, Amanda Hanks +8
We observe the magnetic proximity effect (MPE) in Pt/CoFe2O4 bilayers grown by molecular beam epitaxy. This is revealed through angle-dependent magnetoresistance measurements at 5…
Chiral Bobbers and Skyrmions in Epitaxial FeGe/Si(111) Films
Adam S. Ahmed, James Rowland, Bryan D. Esser +4
We report experimental and theoretical evidence for the formation of chiral bobbers - an interfacial topological spin texture - in FeGe films grown by molecular beam epitaxy (MBE).…
Molecular Beam Epitaxy Growth of [CrGe/MnGe/FeGe] Superlattices: Toward Artificial B20 Skyrmion Materials with Tunable Interactions
Adam S. Ahmed, Bryan D. Esser, James Rowland +2
Skyrmions are localized magnetic spin textures whose stability has been shown theoretically to depend on material parameters including bulk Dresselhaus spin orbit coupling (SOC), i…
Molecular beam epitaxy growth of SrO buffer layers on graphite and graphene for the integration of complex oxides
Adam Ahmed, Hua Wen, Taisuke Ohta +4
We report the successful growth of high-quality SrO films on highly-ordered pyrolytic graphite (HOPG) and single-layer graphene by molecular beam epitaxy. The SrO layers have (001)…
Doping-dependent critical Cooper-pair momentum in thin, underdoped cuprate films
John Draskovic, Stanley Steers, Thomas McJunkin +2
We apply a recently-developed low-field technique to inductively measure the critical pair momentum in thin, underdoped films of YCaBaCuO an…
Epitaxial Co-Deposition Growth of CaGe2 Films by Molecular Beam Epitaxy for Large Area Germanane
Igor V. Pinchuk, Patrick M. Odenthal, Adam S. Ahmed +3
Two-dimensional crystals are an important class of materials for novel physics, chemistry, and engineering. Germanane (GeH), the germanium-based analogue of graphane (CH), is of pa…