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Thursday, April 30, 2020 | History

2 edition of Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide found in the catalog.

Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide

Benjamin Segall

Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide

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Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Gallium -- Electrometallurgy,
  • Modulation (Electronics),
  • Semiconductor doping

  • Edition Notes

    StatementBenjamin Segall
    SeriesNASA technical paper -- 2170
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    Pagination7 p. :
    ID Numbers
    Open LibraryOL14933381M

    Design optimization of indium gallium arsenide phosphide multi-quantum well electroabsorption modulators. Gregory H Ames, University of Rhode Island. Abstract. A theoretical analysis of the performance of InGaAsP multi-quantum well electro-absorption modulators is : Gregory H. Ames. Examines the influence of DX centers on low-temperature density and mobility of two-dimensional electron gas (2DEG) in gallium arsenide/aluminum gallium arsenide heterostructure. Adoption of a triangular quantum well approximation; Factors limiting the 2DEG mobility; Agreement of calculated and. significantly, the very same type of gallium arsenide quantum wells used there, formed with unprecedented levels of purity and control, were utilized in “high-electron-mobility modulation-doped field effect transistors” as developed in the s. These devices form a core technology for wireless communications, e.g., as used in. Electron drift velocities in n-GaAs have been measured at temperatures from 95 K to K and at electric field strengths of up to kV/cm. The present results are in excellent agreement over the entire temperature range with previously reported measurements at lower electric by: 1.

    ELECTRICAL CONDUCTORS A conductor is an object or type of material which permits the flow of electric charges in one or more directions. For example, a wire is an electrical conductor that can carry electricity along its length. Physics All conductors contain electrical charges, which will move when an electric potential difference (measured in volts) is applied across separate .


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Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide by Benjamin Segall Download PDF EPUB FB2

Get this from a library. Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide. [Benjamin Segall; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.].

The effects of electron‐electron scattering and nonparabolic energy band shape on electron mobility in degenerate materials are investigated. Mobility calculations as a function of electron concentration and temperature are compared to experimental by: Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide / By Benjamin.

Segall and United States. National Aeronautics and Space Theoretical study of electron mobility in modulation-doped aluminum gallium arsenide book.

Scientific and Technical Information Branch. Abstract. STAR category "June "buted to depository libraries in es bibliographical. A theoretical study of the mobility at moderately high temperatures, T is greater than or equal to K, is undertaken.

It is suggested that, as usual, the dominant scattering mechanism. Abstract. A theoretical analysis is made of the cutoff frequency for the amplification of space-charge waves in an n-GaAs thin-film semiconductor structure, taking into account the dependence of the drift velocity and the differential electron mobility on the electron is shown that the dependence of the cutoff frequency on the electron density in the film has a maximum, Cited by: 2.

We performed a theoretical study of the electron mobility in strained Si 1−x C x alloys with a continuous variation in the carbon concentration. The study is useful for future device design and simulation. In this paper, we present results for electron bulk mobility in silicon–carbon by: 2.

The alloy system A1GaAs/GaAs is potentially of great importance for many high-speed electronics and optoelectronic devices, because the lattice parameter difference GaAs and A1GaAs is very small, which promises an insignificant concentration of undesirable interface states. Thanks to this prominent feature, a number of interesting properties and phenomena, such as high-mobility.

Non-Linear Electron Mobility in n-Doped (ZB), a theoretical study of the electron drift velocity was performed in this work. half that of gallium arsenide‐based lasers.

For weakly doped GaAs at temperature close to K, electron drift mobility µ n =(/T) 2/3 cm 2 V-1 s Drift and Hall mobility versus electron concentration for different degrees of compensation T= 77 K (Rode []).

Drift and Hall mobility versus electron concentration for different degrees of compensation T= K (Rode []). The thesis concludes with a study of silicon migration in modulation doped GaAs/AlGaAs heterostructures. Low temperature Hall measurements of annealed samples were used to show that silicon diffusion can degrade the electron mobility.

Evidence is presented of the strong localisation of the 2 dimensional electrons in the unannealed : Veli-Matti Airaksinen. Indium Arsenide Electron Mass Effective Electron Effective Electron Mass These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm by: 1. However, the problem is that the dopants also scatter electrons, limiting electron mobility in the material. To solve this problem, the researchers used modulation doping.

The approach was first developed in by Takashi Mimura to create a gallium arsenide high-electron-mobility transistor (HEMT), which won the Kyoto Prize in Gallium Arsenide Aluminum Gallium Arsenide ABSTRACT (Continue on rever*e side If necesary and Identify by block number) The electron-transport characteristics of modulation-doped GaAs-AlxGalxAS heterostructures have been measured over a wide range of temperatures using a diverse set of device by: 1.

Electron Hall mobility versus temperature for different electron concentration: full triangles n o = 410 15 cm -3, circles n o = 410 16cm -3, open triangles n o = 10 16cm Solid curve-calculation for pure InAs. GALLIUM ARSENIDE HETEROSTRUCTURES L Kronig-Penney (Tight-Binding) Model for Superlattice Electronic States A simplified calculation of the electronic energy states of the superlattice can be made by assuming a one-dimensional Kronig- Penney by: 1.

To solve this problem, the researchers used a technique known as modulation doping. The approach was first developed in by Takashi Mimura to create a gallium arsenide high-electron mobility transistor, which won the Kyoto Prize in The electronic band structure, total density of state (DOS) and band gap energy were calculated for Gallium-Arsenide and Aluminium-Arsenide in diamond structures.

The result of minimum total energy and computational time obtained from the experimental lattice constant A for both Gallium Arsenide and Aluminium Arsenide iseV Author: J.

Owolabi, M. Onimisi, S. Abdu, G. Olowomofe. The mean energy necessary to generate an electron-hole pair in gallium arsenide by x and γ photons has been measured in the – K temperature range. The experimental apparatus consists of a Schottky junction on a high-quality epitaxial GaAs, a silicon detector that generates a reference charge signal and highly stable low-noise by: ELECTRON MOBILITY IN HEAVILY DOPED GALLIUM ARSENIDE [E.H.

& Yee, S.S. Stevens] on *FREE* shipping on qualifying : Stevens, E.H. & Yee, S.S. Aluminium arsenide or aluminum arsenide (Al As) is a semiconductor material with almost the same lattice constant as gallium arsenide and aluminium gallium arsenide and wider band gap than gallium arsenide.

(Al As) can form a superlattice with gallium arsenide (Ga As) which results in its semiconductor al formula: AlAs. The approach was first developed in by Takashi Mimura to create a gallium arsenide high-electron mobility transistor, which won the Kyoto Prize in While it is now a commonly used technique to achieve high mobility, its application to Ga 2 O 3.

The energy gap between valence band and conduction band in GaAs is eV. Among, three most popular semiconductor materials are Silicon (Si), Germanium (Ga) and Gallium Arsenide (GaAs). GaAs has the largest energy gap between valence band and the conduction band. From earlythe use of GaAs is growing up.

For manufacturing very. It has a higher saturated electron velocity and higher electron mobility, allowing gallium arsenide transistors to function at frequencies in excess of GHz.

GaAs devices are relatively insensitive to overheating, owing to their wider energy band gap, and they also tend to create less noise (disturbance in an electrical signal) in electronic circuits than silicon Chemical formula: GaAs.

Mimura to create a gallium arsenide high-electron mobility transistor, which won the Kyoto Prize in While it is now a commonly used technique to achieve high mobility. The resulting mobility is expected to be proportional to T-3/2, while the mobility due to optical phonon scattering only is expected to be proportional to T-1/2.

Experimental values of the temperature dependence of the mobility in germanium, silicon and gallium arsenide are provided in Table   KEYWORDS: Indium arsenide, Quantum efficiency, Doping, Gallium antimonide, Semiconductor lasers, Diodes, Terahertz radiation, Phonons, Acoustics, Heterojunctions Read Abstract + This paper will illustrate the potential of InAs/GaSb broken-gap structures for providing a solution to the well-known and long-standing terahertz (THz) frequency gap.

Gallium Arsenide (GaAs) – Electron Velocity-Field Behaviour. In this post, the graph between the electron field and the electron velocity is explained. The reason for the decrease in the drift velocity of the electrons have also been explained in detail.

When the heterostructure FETs (HFET or MOD- FET for modulation-doped FET), also known by many other acronyms (HEMT for high electron mobility transistor, SDHT for selectively doped heterojunction transistor, TGFET for two-dimensional electron gas FET, SISFET for semiconductor-insulator-semiconductor FET, HIGFET for heterojunction insulated-gate.

currently possible. Gallium Arsenide is one candidate material for use in semiconductor spintronic devices and as such detailed study of the spin-tronic properties of Gallium Arsenide is required.

In this thesis we develop a semiclassical approach to the simulation of the electron population in Gal-lium Arsenide. Antisite Related Defects in Semi-Insulating Gallium Arsenide (Invited) 2.

Optical Absorption into a Lattice-Coupled Resonance. Theoretical Study of Carrier Capture Assisted by Phonons: Application to the EL2, E3, A and B Defects in GaAs.

Determination of the Cross-Section for Light Induced Metastable Transition of the EL2 Defect. Home > Press > Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices Schematic stack and the scanning electron microscopic image of the β-(AlxGa1-x)2O3/Ga2O3 modulation-doped field effect transistor.

KEYWORDS: Terahertz radiation, Indium, Superlattices, Indium gallium arsenide, Aluminum, Numerical simulations, Spectroscopy, Terahertz spectroscopy, Sensors, Gallium Read Abstract + We report on a novel-designed superlattice (SL) InGaAs/InAlAs with artificially introduced epitaxial stresses into functional layers.

Theoretical Studies of High Energy Transport of Electrons and Holes in Gallium-Arsenide, Indium-Phosphide, Indium-Arsenide, and Gallium-Antimonide (Semiconductors, Monte Carlo, Impact Ionization) It is determined theoretically that in either GaAs or InP the electron and hole steady state drift velocities are roughly the same.

The calculated. It has a higher saturated electron velocity and higher electron mobility, allowing gallium arsenide transistors to function at frequencies in excess of GHz.

GaAs devices are relatively insensitive to overheating, owing to their wider energy band gap, and they also tend to create less noise (disturbance in an electrical signal) in electronic. Full text of "Study of aluminum-germanium-nickel ohmic contact metallurgical effects at the gallium arsenide interface" See other formats.

1. Phys Rev B Condens Matter. Aug 15;38(5) Electron mobility in quasi-one-dimensional conductors: A theoretical study. Leal CE, da Cunha Lima IC, de Andrada e Silva EA, Troper by: 6.

A normally off-type high electron mobility transistor (HEMT) has: a first single crystalline semiconductor layer (12), such as an undoped GaAs layer; a second single crystalline semiconductor layer (13), such as an N-doped AlGaAs layer, having an electron affinity different from that of the first single crystalline semiconductor layer (12); a heterojunction (14) between Cited by: hot-electron noise in gallium arsenide/aluminum gallium arsenide heterojunction interfaces by christopher francis whiteside a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida acknowledgments.

For GaAs, the effective mass of these electrons is times the mass of free electron (that is, m e, where m e is the free electron rest mass). Thus the shapes in the conduction band bring about a superior electron mobility. Due to this, the electrons travel faster in Gallium Arsenide (GaAs) than in Silicon.

The origin of the term post-transition metal is unclear. An early usage is recorded by Deming, inin his well-known book Fundamental Chemistry. He treated the transition metals as finishing at group 10 (nickel, palladium and platinum).

Getting electrons to move in a semiconductor. The approach was first developed in by Takashi Mimura to create a gallium arsenide high-electron mobility transistor, which won the Kyoto Prize in creating an atomically perfect interface between Ga2O3 and its alloy with aluminum, aluminum gallium oxide -- two semiconductors with.Study of the electronic structure of indium gallium phosphide In Ga P semiconductors silicon and gallium arsenide[1].

It is used mainly in high electron mobility transistor (HEMT) and heterojunction bipolar transistors (HBT) and it has attracted many attentions in high speed.The quest for extremely high mobilities of 2d electron gases in MBE-grown heterostructures is hampered by the available purity of the starting materials.