Search results for: Adam L. Friedman

Items from 1 to 8 out of 8 results

article

Spintronic Quantum Phase Transition in a Graphene/Pb_0.24Sn_0.76Te Heterostructure with Giant Rashba Spin‐Orbit Coupling

Jennifer E. DeMell, Ivan Naumov, Gregory M. Stephen, Nicholas A. Blumenschein, more

Advanced Functional Materials > 34 > 11 > n/a - n/a

Mechanical stacking of two dissimilar materials often has surprising consequences for heterostructure behavior. In particular, a 2D electron gas (2DEG) is formed in the heterostructure of the topological crystalline insulator Pb_0.24Sn_0.76Te and graphene due to contact of a polar with a nonpolar surface and the resulting changes in electronic structure needed to avoid polar catastrophe. The spintronic...

article

Large‐Area Synthesis of Continuous and Uniform MoS₂ Monolayer Films on Graphene

Kathleen M. McCreary, Aubrey T. Hanbicki, Jeremy T. Robinson, Enrique Cobas, more

Advanced Functional Materials > 24 > 41 > 6449 - 6454

Heterostructures composed of multiple layers of different atomically thin materials are of interest due to their unique properties and potential for new device functionality. MoS₂‐graphene heterostructures have shown promise as photodetectors and vertical tunnel transistors. However, progress is limited by the typically micrometer‐scale devices and by the multiple alignments required for fabrication...

article

Chemical vapor sensing of two-dimensional MoS2 field effect transistor devices

Adam L. Friedman, F. Keith Perkins, Enrique Cobas, Glenn G. Jernigan, more

Solid State Electronics > 2014 > 101 > Complete > 2-7

MoS ₂ , in single to few-layer format, is of interest because of its potential for advanced transistor and sensor applications. Its sizable bandgap enables single layer transistors with large on/off current ratios, and the large surface-to-volume ratio provides sensitive transduction of surface physisorption to the channel conductivity. Here, we discuss aspects of transistor device fabrication...

article

Graphene-Based Magnetic Tunnel Junctions

Enrique Cobas, Adam L. Friedman, Olaf M. J. van 't Erve, Jeremy T. Robinson, more

IEEE Transactions on Magnetics > 2013 > 49 > 7 > 4343 - 4346

The growing field of spintronics relies on new techniques and technologies for injecting and detecting electron spins to generate spin-dependent signals and utilize spin as a new state variable. Magnetic tunnel junctions (MTJs) do this by employing thin oxide layers as insulating barriers between two ferromagnetic metals, but the oxides suffer from defects and material interdiffusion that limit device...

article

Epitaxial Graphene Nucleation on C-Face Silicon Carbide

Jennifer K. Hite, Mark E. Twigg, Joseph L. Tedesco, Adam L. Friedman, more

Nano Letters > 2011 > 11 > 3 > 1190 - 1194

article

Investigation of electrical transport in hydrogenated multiwalled carbon nanotubes

Adam L. Friedman, Hyunkyung Chun, Don Heiman, Yung Joon Jung, more

Physica B: Physics of Condensed Matter > 2011 > 406 > 4 > 841-845

Highly disordered multiwalled carbon nanotubes of large outer diameter (∼60nm) fabricated by means of chemical vapor deposition process inside porous alumina templates exhibit ferromagnetism when annealed in a H ₂ /Ar atmosphere. In the presence of an applied magnetic field, there is a transition from positive to negative magnetoresistance. The transition may be explained in terms of the Bright...

article

Quantum Linear Magnetoresistance in Multilayer Epitaxial Graphene

Adam L. Friedman, Joseph L. Tedesco, Paul M. Campbell, James C. Culbertson, more

Nano Letters > 2010 > 10 > 10 > 3962 - 3965

article

Radiation Effects in Single-Walled Carbon Nanotube Thin-Film-Transistors

Cory D Cress, Julian J McMorrow, Jeremy T Robinson, Adam L Friedman, more

IEEE Transactions on Nuclear Science > 2010 > 57 > 6-1 > 3040 - 3045

The fabrication, characterization, and radiation response of single-walled carbon nanotube (SWCNT) thin-film field effect transistors (SWCNT-TFTs) has been performed. SWCNT-TFTs were fabricated on SiO₂-Si substrates from 98% pure semiconducting SWCNTs separated by density gradient ultracentrifugation. Optical and Raman characterization, in concert with measured drain current I_on/I_off ratios, up to...

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GRAPHENE (3)
CARBON NANOTUBES (2)
MOS2 (2)
SPINTRONICS (2)
2D ELECTRON GAS (1)
2D HETEROSTRUCTURES (1)
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Search results for: Adam L. Friedman

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