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Solid-state modulation of 2-dimensional electron gases (2DEGs) with extreme (~3.3 x 1014 cm-2) densities corresponding to 1/2 electron per interface unit cell at complex oxide heterointerfaces (such as SrTiO3/GdTiO3 or SrTiO3/SmTiO3) is…

Mesoscale and Nanoscale Physics · Physics 2016-05-25 Amit Verma , Kazuki Nomoto , Wan Sik Hwang , Santosh Raghavan , Susanne Stemmer , Debdeep Jena

We demonstrate a method to induce tensile and compressive strain into two-dimensional transition metal dichalcogenide (TMDC) MoS$_{2}$ via the deposition of stressed thin films to encapsulate exfoliated flakes. With this technique we can…

Mesoscale and Nanoscale Physics · Physics 2021-07-15 Tara Peña , Shoieb A. Chowdhury , Ahmad Azizimanesh , Arfan Sewaket , Hesam Askari , Stephen M. Wu

We demonstrate a graphene-MoS2 architecture integrating multiple field-effect transistors and we independently probe and correlate the conducting properties of van der Waals coupled graphene-MoS2 contacts with the ones of the MoS2 channels.…

Two-dimensional (2D) semiconductors such as molybdenum disulfide (MoS2) have recently attracted extensive research attention due to their promising compatibility with silicon based electronics. However, several key challenges still limit…

Applied Physics · Physics 2026-03-03 Samiksha Bhatia , Ramesh Singh Bisht , Pramod Kumar

The measurement of acetone in human breath, a known biomarker for diabetes, can act as an effective screening method for diabetes. While gas chromatography and mass spectroscopy based methods can detect gases in low concentration, they are…

Applied Physics · Physics 2019-06-26 Sumant Sarkar , Alison Viegas , Srinivasa R. Raghavan

The primary mechanism of operation of almost all transistors today relies on electric-field effect in a semiconducting channel to tune its conductivity from the conducting 'on'-state to a non-conducting 'off'-state. As transistors continue…

Ultrathin sheets of MoS2 are a newly discovered 2D semiconductor that holds great promise for nanoelectronics. Understanding the pattern of current flow will be crucial for developing devices. In this talk, we present images of current flow…

Mesoscale and Nanoscale Physics · Physics 2017-09-13 Sagar Bhandari , Ke Wang , Kenji Watanabe , Takashi Taniguchi , Philip Kim , Robert M. Westervelt

Studies of different experimental groups that explore the properties of a two-dimensional electron gas in silicon semiconductor systems ((100) Si metal-oxide-semiconductor field-effect transistors (MOSFETs) and (100) SiGe/Si/SiGe quantum…

Strongly Correlated Electrons · Physics 2019-10-15 V. T. Dolgopolov

We demonstrate dual-gated $p$-type field-effect transistors (FETs) based on few-layer tungsten diselenide (WSe$_2$) using high work-function platinum source/drain contacts, and a hexagonal boron nitride top-gate dielectric. A device…

We introduce a deep-recessed gate architecture in $\beta$-Ga$_2$O$_3$ delta-doped field effect transistors for improvement in DC-RF dispersion and breakdown properties. The device design incorporates an unintentionally doped…

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

We fabricate ion-gated field-effect transistors (iFET) on mechanically exfoliated multilayer MoS$_2$. We encapsulate the flake by Al$_2$O$_3$, leaving the device channel exposed at the edges only. A stable Li$^+$ intercalation in the…

Mesoscale and Nanoscale Physics · Physics 2018-10-29 Erik Piatti , Qihong Chen , Mauro Tortello , Jianting Ye , Renato S. Gonnelli

As human activities expand into naturally or man-made radiation-prone environment, the need for radiation-hardened (Rad-Hard) electronic hardware surged. The state-of-the-art silicon-based and two-dimensional (2D) materials based Rad-Hard…

Materials Science · Physics 2021-10-15 Di Chen , Jiankun Li , Zheng Wei , Xinjian Wei , Maguang Zhu , Jing Liu , Guangyu Zhang , Zhiyong Zhang , Jian-Hao Chen

In this letter we discuss how the short channel behavior in sub 100 nm channel range can be improved by inducing a step surface potential profile at the back gate of an asymmetrical double gate (DG) Silicon-On-Insulator (SOI)…

Mesoscale and Nanoscale Physics · Physics 2010-08-19 M. Jagadesh Kumar , G. V. Reddy

We propose and analyze a novel dual-gate Spin Field Effect Transistor (SpinFET) with half-metallic ferromagnetic source and drain contacts. The transistor has two gate pads that can be biased independently. It can be switched ON or OFF with…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 J. Wan , M. Cahay , S. Bandyopadhyay

Scalability and performance of current flash memories can be improved substantially by replacing the floating poly-Si gate by a layer of Si dots. This multi-dot layer can be fabricated CMOS-compatibly in very thin gate oxide by ion beam…

In this letter, we report on high performance depletion/enhancement (D/E)-mode beta-Ga2O3 on insulator (GOOI) field-effect transistors (FETs) with record high drain currents (ID) of 600/450 mA/mm, which are nearly one order of magnitude…

Mesoscale and Nanoscale Physics · Physics 2018-02-08 Hong Zhou , Mengwei Si , Sami Alghmadi , Gang Qiu , Lingming Yang , Peide D. Ye

Led by the rise of the internet of things, the world is experiencing exponential growth of generated data. Data-driven algorithms such as signal processing and artificial neural networks are required to process and extract meaningful…

Mesoscale and Nanoscale Physics · Physics 2024-01-24 Guilherme Migliato Marega , Hyun Goo Ji , Zhenyu Wang , Mukesh Tripathi , Aleksandra Radenovic , Andras Kis

Understanding interface properties in MoS2 field effect transistors with a high-k gate insulator is critical for improving the performance of the device. Here, by applying the time domain charge pumping method, the elementary process for…

Applied Physics · Physics 2018-10-01 Koki Taniguchi , Nan Fang , Kosuke Nagashio

This paper enumerates new architecture of low power dual-edge triggered Flip-Flop (DETFF) designed at 180nm CMOS technology. In DETFF same data throughput can be achieved with half of the clock frequency as compared to single edge triggered…

Other Computer Science · Computer Science 2014-12-30 Anurag , Gurmohan Singh , V. Sulochana