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Matthew T. Dejarld
United States Naval Research Laboratory
7Publications
1H-index
1Citations
Publications 7
Newest
#1Shojan P. Pavunny (NRL: United States Naval Research Laboratory)H-Index: 3
#2R. L. Myers-Ward (NRL: United States Naval Research Laboratory)H-Index: 28
Last.D. Kurt Gaskill (NRL: United States Naval Research Laboratory)H-Index: 21
view all 11 authors...
Abstract A comprehensive photogenerated carrier assisted etching investigation is carried out on the Si polar surface of high-quality p- and n-type (0001) 4H–SiC epilayers. The epilayers have intentional or unintentional doping densities in the 1014–1018 cm−3 range. Cyclic voltammetry and chronoamperometry studies under a non-focused above bandgap (280–400 nm) light illumination (≤0.66 Wcm−2) in a highly basic etching medium (1 wt% KOH solution, pH ∼12) complemented by Mott-Schottky characteriza...
Source
#1Dominik Bloos (University of Stuttgart)H-Index: 1
#2J. Kunc (Charles University in Prague)H-Index: 5
Last.Petr Neugebauer (Central European Institute of Technology)H-Index: 12
view all 10 authors...
We demonstrate that microwave absorption experiments offer a route for easy and efficient measurements of transport properties for fast and accurate quality control of graphene. This conctactless characterization method can be used to quickly evaluate transport properties over large areas without recourse to complex lithographic methods making it suitable as a probe of quality during wafera#13; scale fabrication. In particular, we demonstrate that absorption measurement of transport properties i...
Source
#1Abdel El FatimyH-Index: 3
#2Peize HanH-Index: 1
Last.Paola BarbaraH-Index: 19
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At high phonon temperature, defect-mediated electron-phonon collisions (supercollisions) in graphene allow for larger energy transfer and faster cooling of hot electrons than the normal, momentum-conserving electron-phonon collisions. Disorder also affects the heat flow between electrons and phonons at very low phonon temperature, where the phonon wavelength exceeds the mean free path. In both cases, the cooling rate is predicted to exhibit a characteristic cubic power law dependence on the elec...
#1Matthew T. Dejarld (NRL: United States Naval Research Laboratory)H-Index: 1
#2Paul M. Campbell (NRL: United States Naval Research Laboratory)H-Index: 36
Last.D. K. Gaskill (NRL: United States Naval Research Laboratory)H-Index: 35
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Metal films deposited on graphene are known to influence its electronic properties, but little is known about graphene’s interactions with very low work function rare earth metals. Here we report on the work functions of a wide range of metals deposited on n-type epitaxial graphene (EG) as measured by Kelvin Probe Force Microscopy (KPFM). We compare the behaviors of rare earth metals (Pr, Eu, Er, Yb, and Y) with commonly used noble metals (Cr, Cu, Rh, Ni, Au, and Pt). The rare earth films oxidiz...
1 CitationsSource
#1Yukang Feng (UVA: University of Virginia)H-Index: 2
#2Matthew T. Dejarld (NRL: United States Naval Research Laboratory)H-Index: 1
Last.N. Scott Barker (UVA: University of Virginia)H-Index: 11
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In this paper, millimeter-wave detection is conducted for the first time on the basis of graphene photo- thermoelectric effect. Upon receiving millimeter- wave radiation, graphene generates hot carriers which diffuse towards the nearby drain and source contact metals, and causing a differential drain -source voltage. To optimize detection performance, devices with different drain and source contact metals as well as graphene geometries are designed and tested. Measured results show that using Yb...
Source
#1Shojan P. Pavunny (NRL: United States Naval Research Laboratory)H-Index: 3
#2Hunter Banks (NRL: United States Naval Research Laboratory)
Last.Kurt Gaskill (NRL: United States Naval Research Laboratory)H-Index: 2
view all 9 authors...
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