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Amplification of bipolar current flow by charge induced from an insulated gate electrode (1987)

Xu, J. ; Shur, M. ; Hack, M.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 62 (1987), S. 1108-1111

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: We present the results of a two-dimensional simulation of the amplification of an ambipolar current flow in a four-terminal crystalline silicon device by charge induced into this flow from an insulated gate electrode. We show that although a bipolar current flow in a crystalline device can indeed be modulated by a gate field, the magnitude of this modulation is less than in amorphous silicon double-injection field-effect transistors. Our proposed structure also has an interesting feature in that the gate field redistributes the current flow between its terminals.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.339717

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Digitale Medien

Asymptotic solutions of steady magneto-fluid-dynamic motion between two rotating disks with a small gap (1987)

Xu, J. J. ; Woo, J. T.

[S.l.] : American Institute of Physics (AIP)

Physics of Fluids 30 (1987), S. 3801-3808

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ISSN: 1089-7666

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The steady-state flow of a conducting fluid between two coaxial rotating disks in the presence of an axial magnetic field is considered for the following conditions: (1) the gap d between two disks is very small compared with the radial extension of the disks R; (2) the angular velocity of the disks is not too high, so that the thickness of the Eckman layer δ is still larger than the gap d, (d/δ)1/4(very-much-less-than)1; and (3) the magnetic field B is moderate so that the corresponding Hartman number M(very-much-less-than)R2/d2. Under these conditions asymptotic solutions to the problem are obtained in terms of the small parameter Ε=d/R. The results show that to the lowest-order approximation, the electric properties of the disks are not important to the flow field, while the magnitude of the magnetic field plays an important role in the equilibrium flow profile.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.866417

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