semi insulating properties in GaAs?
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Hi!\n    Actually I dont know the answer for ur question but i want  to know the answer from u. If you have any info abt "Gallium Arsendie Technology" please send me the details. \n        Thank U
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Zero Kelvin for a solid would mean that the vibration state will be at quantum number 1/2 - a standing wave resulting in a gaussian distribution of probability of the mass. This means the atom still occupies most of the space it would at higher temperature, only with less deviation from the average position. Going away from the Dalton model to look at the electron cloud, the electrons will be standing waves at the lowest possible vibration stage.\n\nFor two solids to interpenetrate, they would have to have lattices which are spaced in a way that the electrons would not interact with one another. Even though there are certain (mostly hexagonal) lattices which allow regular occurrence of channels, I don't see how these could penetrate since each still occupy 2 3rds of the available diameter.\n\nIf you leave the solid state and go on to Bose-Einstein condensates, penetration of those (acting like standing waves) have been observed, and obey interference laws as if they were electro-magnetic waves.
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L.E.D. are light emitting diodes, which are comprised of p-n junctions.  P-N junctions are formed using semiconductive material.  P-type semiconductors are composed of positive ions (i.e. holes) and N-type semiconductors are composed of negative ions (i.e. electrons).  When a voltage is added, a current is established, flowing from P to N material.  Current flows only one way through an L.E.D.  This causes electrons and holes to interact.  When this happens, the band gap energy level of an electron decreases, causing a release of energy via a photon (i.e. a particle of light).  \n\nDepending on the semiconductive material of the diode, the released photons result in different colors of light because of different band gap energy.  Here are a few examples:\n\naluminum gallium arsenide (AlGaAs) - red and infrared\n\naluminum gallium phosphide (AlGaP) - green\n\naluminum gallium indium phosphide (AlGaInP) - high-brightness \norange-red, orange, yellow, and green\n\ngallium arsenide phosphide (GaAsP) - red, orange-red, orange, and yellow\n\ngallium phosphide (GaP) - red, yellow and green\n\n-------------\n\nHope this helps
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My vote would be for 'light-based' semiconductors (although semiconductor isn't the right word)\n\nThe technical ability to replicate the integrated circuit, such as those used in computers, with devices using light instead of electricity.\n\nBenefits would include lower operational cost, (resistance in electrical circuits wastes energy by creating unwanted heat) and faster switching times due to lack of radio frequency interference being generated that affects nearby circuitry.\n\nJust my $0.02\n\nOuzinki
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You should try the "Physics Handbook", the "Handbook of Thin Film Technology"\n\nThe Handbook of Physicochemical Properties of the Elements (but this one may be available only in russian).\n\nYou may also try this article in an university library:\n\nL. Vitos, A. V. Ruban, H. L. Skriver, and J. Kollar, The surface energy of metals, Surf. Sci. 411, 186 (1998).
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it is neutral. when u dope it lets say p type, there are free holes generated. however the dopant will be negatively charged as it has given up a hole (aquired a electron). so the total charge is zero and the material is neutral.
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i dont know much about physics but i did a search and this is what i got hope it has what you're looking for:\n\nhttp://science.electronicsinfoline.com/Physics/Electricity_and_Magnetism/
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I cant think of any "effects" related to Schottky, but I can think of the Schottky diode. The Schottky diode (named after German physicist Walter H. Schottky) is a semiconductor diode with a low forward voltage drop and a very fast switching action. A typical application is discharge-protection for solar cells connected to lead-acid batteries. While standard silicon diodes have a forward voltage drop of about 0.6 volts, Schottky diodes voltage drop at forward biases of around 1 mA is in the range 0.15V to 0.45 V, which makes them useful in voltage clamping applications and prevention of transistor saturation. This is due to the higher current density in the Schottky diode.\n\nA Schottky diode uses a metal-semiconductor junction as a Schottky barrier (instead of a semiconductor-semiconductor junction as in conventional diodes). This Schottky barrier results in both very fast switching times and low forward voltage drop.\n\nIt is often said that the Schottky diode is a "majority carrier" semiconductor device. This means that if the semiconductor body is doped N-type, only the N-type carriers (mobile electrons) play a significant role in normal operation of the device. No slow, random recombination of N- and P- type carriers is involved, so this diode can cease conduction faster than an ordinary PN rectifier diode. This property in turn allows a smaller device area, which also makes for a faster transition. Therefore broad-area Schottky diodes are useful in switch-mode power converters which operate at frequencies approaching 1 MHz. Small-area Schottky diodes are the heart of RF detectors and mixers, which often operate up to 5 GHz.\n\nThe most evident limitation of the Schottky diode is difficulty reaching high reverse-bias voltage ratings, and relatively high series resistance when high voltage ratings are attempted. Relatively high reverse leakage current may present an issue in some applications.\n\nCommonly encountered Schottky diodes include the 1N5817, and Schottky metal-semiconductor junctions are featured in 7400 series logic devices because of their higher switching speeds and lower voltage drops.\n\nI hope that this willo help you.
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Atomic Force Microscopy (AFM) is a technique used to obtain the surface homogeneity of a material. This technique is getting popular in that field of semiconductor because the surface quality of the semiconductor plays an important role in the IC industry. So, AFM is one of the important characterization techniques used today in semiconductor field.  \n\nMain idea:\n\nA photodetector in AFM detector records the bending of cantilever, which reflect the topology and other surface properties. The cantilever is a flexible beam and is used as a force sensor. It is connected to the scanner that can move in three dimensions.\n\ncheck this website to find a very good paper on AFM. \n\nhttp://www.wpi.edu/Academics/Depts/Physics/AFM/Pdfs/PosterIntro.pdf
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There are many types but all work on the principle that different semiconductors (i.e conducts electricity under certain conditions) placed together can turn on larger currents in another circuit.\nThe metals usually used are Germanium, Gallium, Asenide or compound of these including Silicon and Aluminium.\nYou might want to look at http://en.wikipedia.org/wiki/Transistor for more detailed info.
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If it's for a simple hobbyist application they need to know only the resistance value and its power rating.\n\nA full specification would also include:\n\ntolerance,  thermal coefficient,  maximum voltage.
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See page 32 of the PowerPoint presentation at http://www.ccm.udel.edu/Personnel/homepage/class_web/Lecture%20Notes/2004/AskelandPhuleNotes-CH10Printable.ppt,\n\nA number of PDFs are found with the following search http://www.google.com/search?hl=en&lr=&q=pb+sn+eutectic+photomicrograph&btnG=Search
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While semiconductors do have a resistance, you can't read it by color. It isn't even constant, which is what makes semiconductors so useful. \n\nResistors, which are not semiconductors, are often marked with a color code that can be read this way:
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Semiconductors are most commonly used in the production of microchips. Most microchips are built on a silicon semi-conductor base. \n\nThe reason semi-conductors are used so widely is because their properties can be changed by adding impurities ("doping") to the raw form. \n\nI hope this helps! Much more information can be found at my source..
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no, because even silicon which is a semi-conductor and used in microchips when it is purified to 99.999% purity, is only a semi-conductor. silicon occurs in crystal form as silicon dioxide.\nin its different forms it can either be a semi-conductor or an insulator.\nsand isn't going to conduct electricity just because an element appears in it in the form of a compund bonded molecule. afterall, H20 conducts electicity, does sugar that also contains water do so in crystalline form? no!\n\nwet sand will conduct electicity, but that is actually the water doing the conducting of the electrical current.\ndry sand is an insulator just like any crystal.\n\nnow if you happen to walk into an environment that has sand made of 99.999% Si and a thunderstorm blows up, the lightning should scare you a little bit.\n\ncement is made of sand, do you see it conducting electricity?\n\nif you take dionized water, which doesn't conduct electicity well, and dump a little sand into it, it may add enough electolytes to improve he electical conductivity of the water, but dry sand on its own does not!
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(m)\n\nPhotoconductivity is the tendency of a substance to conduct electricity to an extent that depends on the intensity of light-radiant energy (usually infrared transmission or visible light) striking the surface of a sample. Most semiconductor materials have this property.\n\nWhen there is no illumination, a photoconductive sample has a conductance that depends on its dimensions, on the specific material(s) from which it is made, and on the temperature. In most cases, the greater the radiant energy of a specific wavelength that strikes the surface, the higher the conductance of the sample becomes, up to a certain maximum. When the maximum conductance is reached for a particular sample, further increases in irradiation produce no change in the conductance.\n\nPhotoconductive materials are used in the manufacture of photoelectric devices. Typical photoconductive substances consist of germanium, gallium, selenium, or silicon with impurities, also known as dopants, added. Other common materials include metal oxides and sulfides
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http://www.epanorama.net/circuits/vga2rgbs.html