M.L. Ackerman
University of Arkansas
8 Papers
17 Citations
M.L. Ackerman is an academic researcher from University of Arkansas. The author has contributed to research in topics: Graphene & Scanning tunneling microscope. The author has an hindex of 6, co-authored 8 publications.
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Papers
Anomalous Dynamical Behavior of Freestanding Graphene Membranes.
TL;DR: Subnanometer, high-bandwidth measurements of the out-of-plane (vertical) motion of atoms in freestanding graphene using scanning tunneling microscopy show that the vertical motion of a graphene membrane exhibits rare long-scale excursions characterized by both anomalous mean-squared displacements and Cauchy-Lorentz power law jump distributions.
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Competing scanning tunneling microscope tip-interlayer interactions for twisted multilayer graphene on the a-plane SiC surface
P. Xu,M.L. Ackerman,S.D. Barber,J. K. Schoelz,Paul Thibado,Virginia D. Wheeler,Luke O. Nyakiti,R. L. Myers-Ward,C. R. Eddy,D. K. Gaskill +9 more
TL;DR: In this paper, a few layer and twisted multilayer epitaxial graphene states synthesized on n + 6H-SiC a-plane non-polar surface is obtained for the first time on few layer images.
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•Posted Content
Atomic-Scale Movement Induced in Nano-Ridges by Scanning Tunneling Microscopy on Epitaxial Graphene Grown on 4H-SiC(0001)
P. Xu,S.D. Barber,J. K. Schoelz,M.L. Ackerman,D. Qi,Paul Thibado,Virginia D. Wheeler,Luke O. Nyakiti,R. L. Myers-Ward,C. R. Eddy,David Kurt Gaskill +10 more
TL;DR: In this paper, nano-ridges in epitaxial multilayer graphene grown on the silicon face of 4 degree off-cut 4H-SiC (0001) were found using scanning tunneling microscopy (STM).
6
Schottky barrier and attenuation length for hot hole injection in nonepitaxial Au on p-type GaAs
Ilona Sitnitsky,J. J. Garramone,Joseph Abel,P. Xu,S.D. Barber,M.L. Ackerman,J. Kevin Schoelz,Paul Thibado,Vincent LaBella +8 more
TL;DR: In this article, the current versus bias characteristics of none-pitaxial nanometer-thick Au on p-type GaAs were obtained to accurately measure the local Schottky barrier height.
3
Thermal mirror buckling in freestanding graphene locally controlled by scanning tunnelling microscopy
Mehdi Neek-Amal,Peng Xu,J. K. Schoelz,M.L. Ackerman,S.D. Barber,Paul Thibado,Ali Sadeghi,François M. Peeters +7 more
TL;DR: This work demonstrates thermal mirror buckling of graphene by scanning tunnelling microscopy and large-scale molecular dynamic simulations and represents a fundamental advance in understanding the influence of temperature gradients on the dynamics of freestanding graphene and future applications with electro-thermal-mechanical nanodevices.