53 citations · 271 across the 21 of their papers we have counts for
19 papers · 1 filter
Graphene bandgap induced by ferroelectric Pca2 HfO substrate: a first-principles study
George Alexandru Nemnes, Daniela Dragoman, Mircea Dragoman
The electronic properties of graphene on top of ferroelectric HfO substrates in orthorhombic phase with space group Pca2 are investigated using density functional theory ca…
Wafer-scale fabrication and room-temperature experiments on graphene-based gates for quantum computation
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman
We have fabricated at wafer scale graphene-based configurations suitable for implementing at room temperature one-qubit quantum gates and a modified Deutsch-Jozsa algorithm. Our me…
Solving the graphene electronics conundrum: high mobility and high on-off ratio in graphene nanopatterned transistors
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman
Tens of graphene transistors with nanoperforated channels and different channel lengths were fabricated at the wafer scale. The nanoholes have a central diameter of 20 nm and a per…
Memristive GaN ultrathin suspended membrane array
Mircea Dragoman, Ion Tiginyanu, Daniela Dragoman +2
In this paper, we show that ultrathin GaN membranes having a thickness of 15 nm and planar dimensions of 12x184 microns act as memristive devices. This fact is due to the migration…
Room temperature nanostructured graphene transistors with high on-off ratio
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman
We report the batch fabrication of graphene field-effect-transistors (GFETs) with nanoperforated graphene as channel. The transistors were cut and encapsulated. The encapsulated GF…
Room temperature on-wafer ballistic graphene field-effect-transistor with oblique double-gate
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman
We have fabricated and measured ballistic graphene transistors with two oblique gates that can be independently biased. The gate lengths are about 38 nm and are separated by a dist…
Two-and three-qubit room-temperature graphene quantum gates
Daniela Dragoman, Mircea Dragoman
Proposed configurations for the implementation of graphene-based CNOT and Toffoli gates working at room temperature are presented. These two logic gates, essential for any quantum…
Enhanced architectures for room-temperature reversible logic gates in graphene
Daniela Dragoman, Mircea Dragoman
We show that reversible two- and three-input logic gates, among which we mention the universal Toffoli gate, can be implemented with three tilted gating electrodes patterned on a m…
Negative differential resistance in graphene-based ballistic field effect transistor with oblique top gate
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman
Negative differential resistance (NDR) with room temperature peak-valley-ratio of 8 has been observed in a ballistic field-effect-transistor (FET) based on graphene, having an obli…
Complementary memristive device based on a thin film of MoS2 monolayers
Antonio Radoi, Mircea Dragoman, Daniela Dragoman +1
In this manuscript we demonstrate experimentally that a thin film of MoS2 monolayers formed by drop-casting on a gold interdigitated electrode on Si/SiO2 behaves like a complementa…
Microwave and millimeterwave electrical permittivity of graphene monolayer
Alina Cismaru, Mircea Dragoman, Adrian Dinescu +3
The effective electrical permittivity of a graphene monolayer is experimentally investigated in the 5-40 GHz range, which encompasses the microwave and the lower part of millimeter…
Geometrical-induced rectification in two-dimensional ballistic nanodevices
Daniela Dragoman, Mircea Dragoman
The paper demonstrates that a two-dimensional ballistic nanodevice in which the electron gas satisfies either the Schroodinger equation (as in quantum wells in common semiconductor…
Extending ballistic graphene FET lumped element models to diffusive devices
Giancarlo Vincenzi, G. Deligeorgis, Fabio Coccetti +4
In this work, a modified, lumped element graphene field effect device model is presented. The model is based on the "Top-of-the-barrier" approach which is usually valid only for ba…
Graphene-like metallic-on-silicon field effect transistor
M. Dragoman, G. Konstantinidis, K. Tsagaraki +3
In this manuscript, we present a field effect transistor with a channel consisting of a two-dimensional electron gas located at the interface between an ultrathin metallic film of…
Graphene radio: Detecting radiowaves with a single atom sheet
Mircea Dragoman, Dan Neculoiu, Alina Cismaru +3
We present the experimental evidence of RF demodulation by a graphene monolayer embedded in a coplanar structure. The demodulator was tested in the frequency range from 100 MHz to…
Time Flow in Graphene and Its Implications on the Cutoff Frequency of Ballistic Graphene Devices
Daniela Dragoman, Mircea Dragoman
This manuscript deals with time flow in ballistic graphene devices. It is commonly believed that in the ballistic regime the traversal time of carriers in gated graphene at normal…
Real-Time Detection of Deoxyribonucleic Acid Bases via their Negative Differential Conductance Signature
Daniela Dragoman, Mircea Dragoman
In this paper we present a method for the real-time detection of the bases of the deoxyribonucleic acid using their signatures in negative differential conductance measurements. Th…
Current Oscillations and Negative Resistances in Crossed Carbon Nanotubes Suspended Over a Dielectric Trench
M. Al Ahmad, D. Dragoman, M. Dragoman +4
An oscillatory dependence of the drain current on the drain voltage is found in a nanostructure consisting of two crossing semiconductor carbon nanotubes that are suspended over a…
Writing Electronic Devices on Paper with Carbon Nanotube Ink
M. Dragoman, E. Flahaut, D. Dragoman +2
The normal paper used in any printer is among the cheapest flexible organic materials that exist. We demonstrate that we can print on paper high-frequency circuits tunable with an…