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Microscopy of hydrogen and hydrogen-vacancy defect structures on graphene devices
Dillon Wong, Yang Wang, Wuwei Jin +8
We have used scanning tunneling microscopy (STM) to investigate two types of hydrogen defect structures on monolayer graphene supported by hexagonal boron nitride (h-BN) in a gated…
Transport Spectroscopy of Sublattice-Resolved Resonant Scattering in Hydrogen-Doped Bilayer Graphene
Jyoti Katoch, Tiancong Zhu, Denis Kochan +3
We report the experimental observation of sublattice-resolved resonant scattering in bilayer graphene by performing simultaneous cryogenic atomic hydrogen doping and electron trans…
Electronic Structure of Exfoliated and Epitaxial Hexagonal Boron Nitride
Roland J. Koch, Jyoti Katoch, Simon Moser +6
Hexagonal boron nitride (hBN) is an essential component in van der Waals heterostructures as it provides high quality and weakly interacting interfaces that preserve the electronic…
Importance of Paramagnetic Background Subtraction for Determining the Magnetic Moment in Epitaxially Grown Monolayer and Few-Layer van der Waals Magnets
Dante J. O'Hara, Tiancong Zhu, Roland K. Kawakami
Due to the atomically thin nature of monolayer and few-layer van der Waals magnets, the undesired background signal from the substrate can have significant contribution when charac…
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…
Probing Tunneling Spin Injection into Graphene via Bias Dependence
Tiancong Zhu, Simranjeet Singh, Jyoti Katoch +4
The bias dependence of spin injection in graphene lateral spin valves is systematically studied to determine the factors affecting the tunneling spin injection efficiency. Three ty…