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In this letter, a top-gated field effect device (FED) manufactured from monolayer graphene is investigated. Except for graphene deposition, a conventional top-down CMOS-compatible process flow is applied. Carrier mobilities in graphene…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 M. C. Lemme , T. J. Echtermeyer , M. Baus , H. Kurz

A dual-gate graphene field-effect transistors is presented, which shows improved RF performance by reducing the access resistance using electrostatic doping. With a carrier mobility of 2700 cm2/Vs, a cutoff frequency of 50 GHz is…

Mesoscale and Nanoscale Physics · Physics 2009-12-21 Yu-Ming Lin , Hsin-Ying Chiu , Keith A. Jenkins , Damon B. Farmer , Phaedon Avouris , Alberto Valdes-Garcia

Graphene field-effect transistors (GFETs) are experimental devices which are increasingly seeing commercial and research applications. Simulation and modelling forms an important stage in facilitating this transition, however the majority…

Mesoscale and Nanoscale Physics · Physics 2022-06-28 Nathaniel J. Tye , Abdul Wadood Tadbier , Stephan Hofmann , Phillip Stanley-Marbell

In this work, we present a performance analysis of Field Effect Transistors based on recently fabricated 100% hydrogenated graphene (the so-called graphane) and theoretically predicted semi-hydrogenated graphene (i.e. graphone). The…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 Gianluca Fiori , S. Lebègue , A. Betti , P. Michetti , M. Klintenberg , O. Eriksson , Giuseppe Iannaccone

Graphene is a two-dimensional (2D) semimetal with high mobility in charge carriers due to the existence of Dirac points. Silicene is another promising material, with properties analog to graphene. Many silicon (Si) based electronic devices…

Materials Science · Physics 2021-09-07 K M Abeywickrama , P K D D P Pitigala , W W P De Silva

In this study, we report the progress made towards the definition of a modular compact modeling technology for graphene field-effect transistors (GFET) that enables the electrical analysis of arbitrary GFET-based integrated circuits. A set…

Graphene solution-gated field-effect transistors (SGFETs) are a promising platform for the recording of cell action potentials due to the intrinsic high signal amplification of graphene transistors. In addition, graphene technology fulfils…

Graphene is considered to be a promising candidate for future nano-electronics due to its exceptional electronic properties. Unfortunately, the graphene field-effect-transistors (FETs) cannot be turned off effectively due to the absence of…

Materials Science · Physics 2010-02-11 Fengnian Xia , Damon B. Farmer , Yu-ming Lin , Phaedon Avouris

Graphene is being increasingly used as an interesting transducer membrane in micro- and nanoelectromechanical systems (MEMS and NEMS, respectively) due to its atomical thickness, extremely high carrier mobility, high mechanical strength and…

Mesoscale and Nanoscale Physics · Physics 2024-10-03 Xuge Fan , Chang He , Jie Ding , Qiang Gao , Hongliang Ma , Max C. Lemme , Wendong Zhang

For the first time, n-type few-layer MoS2 field-effect transistors with graphene/Ti as the hetero-contacts have been fabricated, showing more than 160 mA/mm drain current at 1 {\mu}m gate length with an on-off current ratio of 107. The…

Materials Science · Physics 2014-05-13 Yuchen Du , Lingming Yang , Jingyun Zhang , Han Liu , Kausik Majumdar , Paul D. Kirsch , Peide D. Ye

We have developed metal-oxide graphene field-effect transistors (MOGFETs) on sapphire substrates working at microwave frequencies. For monolayers, we obtain a transit frequency up to ~ 80 GHz for a gate length of 200 nm, and a power gain…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 E. Pallecchi , C. Benz , A. C. Betz , H. v. Löhneysen , B. Plaçais , R. Danneau

The effect of the SiO$_2$ substrate on a graphene film is investigated using realistic but computationally convenient energy-optimized models of the substrate supporting a layer of graphene. The electronic bands are calculated using…

Mesoscale and Nanoscale Physics · Physics 2007-11-06 M. W. C. Dharma-wardana

This letter reports the impact of surface morphology on the carrier transport and RF performance of graphene FETs formed on epitaxial graphene films synthesized on SiC substrates. Such graphene exhibits long terrace structures with widths…

A spin field effect transistor (FET) is proposed by utilizing a graphene nanoribbon as the channel. Similar to the conventional spin FETs, the device involves ferromagnetic metals as a source and drain; they, in turn, are connected to the…

Materials Science · Physics 2007-07-23 Y. G. Semenov , K. W. Kim , J. M. Zavada

This letter investigates the bias-dependent low frequency noise of single layer graphene field-effect transistors. Noise measurements have been conducted with electrolyte-gated graphene transistors covering a wide range of gate and drain…

Mesoscale and Nanoscale Physics · Physics 2018-10-22 Nikolaos Mavredakis , Ramon Garcia Cortadella , Andrea Bonaccini Calia , Jose A. Garrido , David Jiménez

In this work we test graphene electrodes in nano-metric channel n-type Organic Field EffectTransistors (OFETs) based on thermally evaporated thin films of perylene-3,4,9,10-tetracarboxylic acid diimide derivative (PDIF-CN2). By a thorough…

Applied Physics · Physics 2018-10-31 F. Chianese , A. Candini , M. Affronte , N. Mishra , C. Coletti , A. Cassinese

The linear band dispersion of graphene's bands near the Fermi level gives rise to its unique electronic properties, such as a giant carrier mobility, and this has triggered extensive research in applications, such as graphene field-effect…

Heterostructures comprising of silicon (Si), molybdenum disulfide (MoS${_2}$) and graphene are investigated with respect to the vertical current conduction mechanism. The measured current-voltage (I-V) characteristics exhibit temperature…

In this work, double-gated field effect transistors manufactured from monolayer graphene are investigated. Conventional top-down CMOS-compatible processes are applied except for graphene deposition by manual exfoliation. Carrier mobilities…

Materials Science · Physics 2015-05-13 M. C. Lemme , T. J. Echtermeyer , M. Baus , B. N. Szafranek , J. Bolten , M. Schmidt , T. Wahlbrink , H. Kurz

We report on the fabrication and characterization of field effect transistors (FETs) based on chemical vapor deposited (CVD) graphene encapsulated between few layer CVD boron nitride (BN) sheets with complementary metal oxide semiconductor…