271 citations · 437 across the 20 of their papers we have counts for
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Disentangling spin-orbit coupling and local magnetism in a quasi-two-dimensional electron system
Xinxin Cai, Yilikal Ayino, Jin Yue +3
Quantum interference between time-reversed electron paths in two dimensions leads to the well-known weak localization correction to resistance. If spin-orbit coupling is present, t…
Coulomb blockade regions in sputter-deposited titanium nitride films
Michael Dreyer, Peng Xu, Kevin D. Osborn +1
We present topographic and spectroscopic scanning tunneling microscopy measurements taken on a 21 nm thick TiN film at a temperature of 4.2 K -- above the superconducting transitio…
Ferromagnetism and spin-dependent transport at a complex oxide interface
Yilikal Ayino, Peng Xu, Juan Tigre-Lazo +3
Complex oxide interfaces are a promising platform for studying a wide array of correlated electron phenomena in low-dimensions, including magnetism and superconductivity. The micro…
Streamlined Inexpensive Integration of a Growth Facility and Scanning Tunneling Microscope for in situ Characterization
P. Xu, D. Qi, S. D. Barber +3
The integration of a scanning tunneling microscope chamber with a sample growth facility using non-custom, commercially available parts is described. The facility also features a n…
Controlling Mn Depth Profiles in GaMnAs During High-Temperature Molecular Beam Epitaxial Growth
P. Xu, D. Qi, M. L. Ackerman +2
Mn-doped GaAs thin films were grown at a high substrate temperature of 580 C. During the growth process, the Mn cell temperature was ramped at different rates, resulting in a varie…
Giant Surface Charge Density of Graphene Resolved From Scanning Tunneling Microscopy and First-Principles Theory
P. Xu, Y. Yang, S. D. Barber +6
In this work, systematic constant-bias, variable-current scanning tunneling microscopy (STM) measurements and STM simulations from density-functional theory are made, yielding crit…
Atomic Control of Strain in Freestanding Graphene
P. Xu, Y. Yang, S. D. Barber +8
In this study, we describe a new experimental approach based on constant-current scanning tunneling spectroscopy to controllably and reversibly pull freestanding graphene membranes…
High-Percentage Success Method for Preparing and Pre-Evaluating Tungsten Tips for Atomic-Resolution Scanning Tunneling Microscopy
J. K. Schoelz, P. Xu, S. D. Barber +5
A custom double-lamella method is presented for electrochemically etching tungsten wire for use as tips in scanning tunneling microscopy (STM). For comparison, tips were also manuf…
A Pathway between Bernal and Rhombohedral Stacked Graphene Layers with Scanning Tunneling Microscopy
P. Xu, Y. Yang, D. Qi +7
Horizontal shifts in the top layer of highly oriented pyrolytic graphite, induced by a scanning tunneling microscope (STM) tip, are presented. Excellent agreement is found between…
Schottky barrier and attenuation length for hot hole injection in non-epitaxial Au on p-type GaAs
I. Sitnitsky, J. J. Garramone, J. R. Abel +6
Ballistic electron emission microscopy (BEEM) was performed to obtain nanoscale current versus bias characteristics of non-epitaxial Au on p-type GaAs in order to accurately measur…
Electromechanical properties of freestanding graphene functionalized with tin oxide (SnO2) nanoparticles
L. Dong, J. Hansen, P. Xu +5
Freestanding graphene membranes were functionalized with SnO2 nanoparticles. A detailed procedure providing uniform coverage and chemical synthesis is presented. Elemental composit…
Broad frequency and amplitude control of vibration in freestanding graphene via scanning tunneling microscopy with calculated dynamic pseudo-magnetic fields
P. Xu, J. K. Schoelz, S. D. Barber +2
A technique to locally generate mechanical vibrations in freestanding graphene using scanning tunneling microscopy (STM) is presented. The frequency of the mechanical vibrations is…
Self-Organized Platinum Nanoparticles on Freestanding Graphene
Peng Xu, Lifeng Dong, Mehdi Neek-Amal +8
Freestanding graphene membranes were successfully functionalized with platinum nanoparticles (Pt NPs). High-resolution transmission electron microscopy revealed a homogeneous distr…