Dimensional excitations in narrow electron inversion channels on Si

Alsmeier, J.; Batke, E.; Kotthaus, J. P.

doi:10.1103/physrevb.40.12574

Cited by 49 publications

(7 citation statements)

References 9 publications

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“…The quantization of the wave number and the discreteness of the plasma oscillation spectrum were observed experimentally in isolated 2D electron channels. 25 One needs to note that there is some distinction in the quantization rules in the case of a 2D channel with electrically connected metal contacts ͑considered here͒ and in the case of isolated 2D channel. This is due to different boundary conditions at the 2D channel edges.…”

Section: Spectrum Of Plasma Oscillationsmentioning

confidence: 99%

Admittance of a slot diode with a two-dimensional electron channel

Ryzhii

Satou

Shur

2003

Journal of Applied Physics

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We calculate the frequency-dependent admittance of a diode with a two-dimensional electron channel in a slot between strip-like contacts. Hydrodynamic electron transport equations coupled with a two-dimensional Poisson equation for the self-consistent electric potential are used. Using the calculated expression for the admittance, we analyze the effect of the planar contacts and external capacitance on the plasma oscillations in the system under consideration. The obtained results are useful for the interpretation of experimental observation of plasma effects in high-electron mobility transistors and optimization of terahertz devices based on these transistors.

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Section: Spectrum Of Plasma Oscillationsmentioning

confidence: 99%

Admittance of a slot diode with a two-dimensional electron channel

Ryzhii

Satou

Shur

2003

Journal of Applied Physics

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“…The grating coupler we have in mind is a conducting sheet that lies parallel to and separated by h from the plane containing the quantum wires. Although it is common ͑but not necessary͒ practice 1,[20][21][22] to use the grating's shape to produce the static potentials that confine the electrons, we shall ignore how the ground state configuration is actually produced and instead concentrate on how the system responds to infrared fields. Then it is sufficient to describe the grating as a flat 2D conductor whose ͑local͒ resistivity varies periodically in the y direction.…”

Section: Transmission Spectrum Of the Grating-wire Systemmentioning

confidence: 99%

“…Let us also emphasize that we are proposing the use of the spatial variation of the infrared exciting fields to get around the restrictions of the generalized Kohn theorem 2,19 rather than modifying the parabolic form of the bare confining potential. [3][4][5][6][7]9,[21][22][23] An alternative path to the same goal is provided by Raman scattering. 24,25 We assume that the grating period d is on the order of micrometers and hence much smaller than the vacuum wavelength of the infrared radiation.…”

Section: Transmission Spectrum Of the Grating-wire Systemmentioning

confidence: 99%

Classical continuum theory of the dipole-forbidden collective excitations in quantum strips

Vignale

1996

Phys. Rev. B

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We investigate the collective mode excitation spectrum of an electron gas in a quantum strip that is subjected to a perpendicular magnetic field, with emphasis on the dipole-forbidden transitions. The quantum strip is assumed to be defined in a two-dimensional electron gas by the application of a parabolic confining potential. A classical continuum theory of the collective modes is developed and solved exactly. These results are used to determine the density-response functions. An experimental method to detect the dipole-forbidden modes, based on the use of an asymmetric planar metal grating above an array of quantum strips, is proposed, and calculations of the expected infrared transmission spectrum of the combined grating-strip system are presented. In a system with reasonable parameters, we find that some of the dipole-forbidden absorption peaks are large enough to be observable.

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“…Since the electron slab has a finite effective width W, standing magnetoplasma waves [12,15,16] (i.e., dimensional resonances) are expected to form along the normal of the electron system with q '=NKIW (for integer A^). Since W increases with Ns, the q of these modes decreases with A^.^.…”

Section: (3)mentioning

confidence: 99%

Magnetorotons in quasi-three-dimensional electron systems

et al. 1991

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The dispersion relation for magnetoplasmons propagating perpendicular to the magnetic field is investigated for a quasi-three-dimensional electron system. The magnetic field is in the plane of a = 100-nmwide electron slab which is confined by a wide AlvGai-vAs parabolic quantum well. A minimum is found in the magnetoplasma dispersion relation, indicating the existence of a magnetoroton excitation for wave vector q about twice the inverse magnetic length. Calculations of the dispersion relation within the single-mode approximation are in good qualitative agreement with the measurements.

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Dimensional excitations in narrow electron inversion channels on Si

Cited by 49 publications

References 9 publications

Admittance of a slot diode with a two-dimensional electron channel

Admittance of a slot diode with a two-dimensional electron channel

Classical continuum theory of the dipole-forbidden collective excitations in quantum strips

Magnetorotons in quasi-three-dimensional electron systems

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