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A scheme is proposed to electrically measure the spin-momentum coupling in the topological insulator surface state by injection of spin polarized electrons from silicon. As a first approach, devices were fabricated consisting of thin…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 C. Ojeda-Aristizabal , M. S. Fuhrer , N. P Butch , J. Paglione , I. Appelbaum

The authors report on the crystallographic orientation dependence of the Schottky properties for heterojunctions between a half-metallic ferromagnet La$_0.6$Sr$_0.4$MnO$_3$ (LSMO) and Nb-doped SrTiO3 semiconductor. The Schottky barrier…

Materials Science · Physics 2015-05-13 M. Minohara , Y. Furukawa , R. Yasuhara , H. Kumigashira , M. Oshima

Accurate prediction of Schottky barrier heights (SBHs) at metal-semiconductor (M-SC) interfaces is essential for understanding and optimizing charge injection in electronic and optoelectronic devices. However, first-principles calculations…

Materials Science · Physics 2026-03-10 Viviana Dovale-Farelo , Kamal Choudhary

$\beta$-Ga$_2$O$_3$ is a next-generation ultra wide bandgap semiconductor (E$_g$ = 4.8 eV to 4.9 eV) that can be homoepitaxially grown on commercial substrates, enabling next-generation power electronic devices among other important…

Applied Physics · Physics 2020-08-05 M. Brooks Tellekamp , Karen N. Heinselman , Steve Harvey , Imran Khan , Andriy Zakutayev

${\beta}$-Ga${_2}$O${_3}$ based semiconductor devices are expected to have significantly improved high-power and high-temperature performance due to its ultra-wide bandgap of close to 5 eV. However, the high-temperature operation of these…

Systems and Control · Electrical Eng. & Systems 2022-04-04 Shahadat H. Sohel , Ramchandra Kotecha , Imran S Khan , Karen N. Heinselman , Sreekant Narumanchi , M Brooks Tellekamp , Andriy Zakutayev

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…

We exploit scanning probe controlled domain patterning in a ferroelectric top layer to induce nonvolatile modulation of the conduction characteristic of monolayer MoS$_2$ between a transistor and a junction state. In the presence of a…

Mesoscale and Nanoscale Physics · Physics 2017-06-12 Zhiyong Xiao , Jingfeng Song , David K. Ferry , Stephen Ducharme , Xia Hong

Ballistic electron emission microscopy (BEEM) was performed to obtain nanoscale current versus bias characteristics of non-epitaxial Au on p-type GaAs in order to accurately measure the local Schottky barrier height. Hole injection BEEM…

Mesoscale and Nanoscale Physics · Physics 2015-02-04 I. Sitnitsky , J. J. Garramone , J. R. Abel , P. Xu , S. D. Barber , M. L. Ackerman , J. K. Schoelz , P. M. Thibado , V. P. LaBella

The transition metal dichalcogenide ($MX_{2}$, where $M$=Mo, W and $X$=S, Se, Te) monolayers are of high interest for semiconducting applications at the nanoscale level; this interest is due to both their direct band gaps and high charge…

Mesoscale and Nanoscale Physics · Physics 2018-06-06 Dominik Szczȩśniak , Ross D. Hoehn , Sabre Kais

High-quality two-dimensional (2D) dielectrics are crucial for fabricating 2D/3D hybrid vertical electronic devices such as metal-oxide-semiconductor (MOS) based Schottky diodes and hot electron transistors, the production of which is…

We demonstrate the formation of semimetal graphite/semiconductor Schottky barriers where the semiconductor is either silicon (Si), gallium arsenide (GaAs) or 4H-silicon carbide (4H-SiC). Near room temperature, the forward-bias diode…

Materials Science · Physics 2015-05-14 S. Tongay , T. Schumann , A. F. Hebard

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

600V/20A 4H-SiC Schottky barrier diodes (SBD) were fabricated to investigate the effect of key processing steps, especially before and after a formation of Schottky contact, on the electrical performances of SBD and on a long-term…

Materials Science · Physics 2015-06-18 In-Ho Kang , Sang-Cheol Kim , Jung-Hyeon Moon , Wook Bahng , Nam-Kyun Kim

An aluminum nitride (AlN) Schottky barrier diode (SBD) was fabricated on a nonpolar AlN crystal grown on tungsten substrate by physical vapor transport. The Ni/Au-AlN SBD features a low ideality factor n of 3.3 and an effective Schottky…

Schottky barrier contact has been fabricated by thermal deposition of Al on (100) Ge (impurity concentration~1010/cm3 at 80K) that shows extrinsic p-type to intrinsic n-type transition near 180K. Both p and n-type Ge exhibits ideal Schottky…

Materials Science · Physics 2020-11-30 Shreyas Pitale , Manoranjan Ghosh , S. G. Singh , Husain Manasawala , G. D. Patra , Shashwati Sen

The Schottky barrier height ($E_{SBH}$) is a crucial factor in determining the transport properties of semiconductor materials as it directly regulates the carrier mobility in opto-electronics devices. In principle, van der Waals (vdW)…

Mesoscale and Nanoscale Physics · Physics 2022-03-10 Yuqi Chen , Huanhuan Zhang , Bo Wen , Xibo Li , Yifeng Chai , Ying Xu , Xiaolin Wei , Wen-Jin Yin , Gilberto Teobaldi

We predict it is possible to achieve high-efficiency room-temperature spin injection from a mag- netic metal into InAs-based semiconductors using an engineered Schottky barrier based on an InAs/AlSb superlattice. The Schottky barrier with…

Mesoscale and Nanoscale Physics · Physics 2009-09-28 Joseph Pingenot , Michael E. Flatté

In 2D-semiconductor-based field-effect transistors and optoelectronic devices, metal-semiconductor junctions are one of the crucial factors determining device performance. The Fermi-level (FL) pinning effect, which commonly caused by…

Schottky barrier height and the ideality factor $\eta$ are established for the first time in the single phase (Ga,Mn)N using a vertical geometry device. The material has been heteroepitaxially grown on commercially available low threading…

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