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In this article, we study the properties of metal contacts to single-layer molybdenum disulfide (MoS2) crystals, revealing the nature of switching mechanism in MoS2 transistors. On investigating transistor behavior as contact length…

Mesoscale and Nanoscale Physics · Physics 2014-01-29 Han Liu , Mengwei Si , Yexin Deng , Adam T. Neal , Yuchen Du , Sina Najmaei , Pulickel M. Ajayan , Jun Lou , Peide D. Ye

Here, we report the observation of a hitherto unreported optoelectronic effect, namely a light-induced diode-like response in multi-layered MoSe$_2$ field-effect transistors whose sense of current rectification is controllable through a…

Mesoscale and Nanoscale Physics · Physics 2015-11-16 Nihar R. Pradhan , Zhengguang Lu , Daniel Rhodes , Dmitry Smirnov , Efstratios Manousakis , Luis Balicas

Bottom-up synthesized GNRs and GNR heterostructures have promising electronic properties for high performance field effect transistors (FETs) and ultra-low power devices such as tunnelling FETs. However, the short length and wide band gap…

The Schottky diode, BN/GaN layered composite contacting to bulk aluminum, is theoretically plausible to harvest wireless energy above X-band. According to our first principle calculation, the insertion of GaN layers dramatically influences…

Materials Science · Physics 2021-01-29 Chi Ho Wong , Frank Leung Yuk Lam , Xijun Hu , Anatoly Fedorovich Zatsepin

We report a polarization-induced 2D electron gas (2DEG) at an epitaxial AlBN/GaN heterojunction grown on a SiC substrate. Using this 2DEG in a long conducting channel, we realize ultra-thin barrier AlBN/GaN high electron mobility…

An increase in power consumption necessitates a low-power circuit technology to extend Moore's law. Low-power transistors, such as tunnel field-effect transistors (TFETs), negative-capacitance field-effect transistors (NC-FETs), and…

We investigate electronic transport properties of Schottky-barrier field-effect transistors (FET) based on double-walled carbon nanotubes (DWNT) with a semiconducting outer shell and a metallic inner one. These kind of DWNT-FET show…

Mesoscale and Nanoscale Physics · Physics 2007-07-26 Shidong Wang , Milena Grifoni

In this article, a novel two-path model is proposed to quantitatively explain sub-threshold characteristics of back-gated Schottky barrier FETs (SB-FETs) from 2D channel materials. The model integrates the 'conventional' model for SB-FETs…

Mesoscale and Nanoscale Physics · Physics 2017-10-04 Abhijith Prakash , Hesameddin Ilatikhameneh , Peng Wu , Joerg Appenzeller

This letter reports the first demonstration of AlN Schottky diodes on bulk AlN substrates by metalorganic chemical vapor phase deposition (MOCVD) with breakdown voltages exceeding 3 kV. The devices exhibited good rectifying characteristics…

Applied Physics · Physics 2023-11-10 Dinusha Herath Mudiyanselage , Dawei Wang , Ziyi He , Bingcheng Da , Houqiang Fu

We report on the electronic transport properties of multiple-gate devices fabricated from undoped silicon nanowires. Understanding and control of the relevant transport mechanisms was achieved by means of local electrostatic gating and…

Mesoscale and Nanoscale Physics · Physics 2012-08-08 Massimo Mongillo , Panayotis Spathis , Georgios Katsaros , Pascal Gentile , Silvano De Franceschi

Ga2O3 Schottky barrier diodes featuring a field plate and a composite SiO2/SiNx dielectric layer beneath the field plate were fabricated, achieving a breakdown voltage of 2.4 kV at room temperature. Electrical performance and degradation…

The potential barrier height at the interface formed by a metal contact and multiple one-dimensional (1D) quasi-ballistic channels in field-effect transistors (FETs) is evaluated across different carbon nanotube and nanowire device…

Mesoscale and Nanoscale Physics · Physics 2022-07-12 Anibal Pacheco-Sanchez , Quim Torrent , David Jiménez

This work presents the electrostatic analysis of a novel Ga$_2$O$_3$ vertical Schottky diode with three different guard ring configurations to reduce the peak electric field at the metal edges. Highly doped p-type GaN, p-type nonpolar AlGaN…

Applied Physics · Physics 2020-10-13 Saurav Roy , Arkka Bhattacharyya , Sriram Krishnamoorthy

The Schottky barrier of a metal-semiconductor junction is one of the key quantities affecting the charge transport in a transistor. The Schottky barrier height depends on several factors, such as work function difference, local atomic…

Mesoscale and Nanoscale Physics · Physics 2020-12-09 Line Jelver , Daniele Stradi , Kurt Stokbro , Karsten Wedel Jacobsen

We report on the realization and top-gating of a two-dimensional electron system in a nuclear spin free environment using 28Si and 70Ge source material in molecular beam epitaxy. Electron spin decoherence is expected to be minimized in…

Mesoscale and Nanoscale Physics · Physics 2009-01-19 J. Sailer , V. Lang , G. Abstreiter , G. Tsuchiya , K. M. Itoh , J. W. Ager , E. E. Haller , D. Kupidura , D. Harbusch , S. Ludwig , D. Bougeard

Two key subjects stand out in the pursuit of semiconductor research: material quality and contact technology. The fledging field of atomically thin transition metal dichalcogenides (TMDCs) faces a number of challenges in both efforts. This…

Tunnel field effect transistor (TFET) devices are attractive as they show good scalability and have very low leakage current. However they suffer from low on-current and high threshold voltage. In order to employ the TFET for circuit…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Sneh Saurabh , M. Jagadesh Kumar

We investigate high-mobility two-dimensional electron gases in AlGaAs heterostructures by employing Schottky-gate-dependent measurements of the samples' electron density and mobility. Surprisingly, we find that two different sample…

Mesoscale and Nanoscale Physics · Physics 2011-06-16 C. Rossler , T. Feil , P. Mensch , T. Ihn , K. Ensslin , D. Schuh , W. Wegscheider

Detail transport properties of graphene/MoS2/metal vertical heterostructure have been investigated. The van der Waals interface between the graphene and MoS2 exhibits Schottky barrier. The application of gate voltage to the graphene layer…

Mesoscale and Nanoscale Physics · Physics 2015-03-10 Yohta Sata , Rai Moriya , Takehiro Yamaguchi , Yoshihisa Inoue , Sei Morikawa , Naoto Yabuki , Satoru Masubuchi , Tomoki Machida

Non-crystalline thin-film Schottky diodes are cost-effective but often exhibit unreliable electrical characteristics due to material imperfections. In this work, I present a Schottky diode structure utilizing in-situ grown Ta2O5 and ZnO…

Materials Science · Physics 2025-04-02 Jihun Lim