271 citations · 437 across the 20 of their papers we have counts for
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Band alignment of epitaxial SrTiO3 thin films with (LaAlO3)0.3-(Sr2AlTaO6)0.7 (001)
Ryan B. Comes, Peng Xu, Bharat Jalan +1
SrTiO (STO) epitaxial thin films and heterostructures are of considerable interest due to the wide range of functionalities they exhibit. The alloy perovskite (LaAlO)$_…
Intrinsic Instability of the Hybrid Halide Perovskite Semiconductor CH3NH3PbI3
Yue-Yu Zhang, Shiyou Chen, Peng Xu +4
The organic-inorganic hybrid perovskite CH3NH3PbI3 has attracted significant interest for its high performance in converting solar light into electrical power with an efficiency ex…
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…