NDLI: Nearly Universal <formula formulatype=inline><tex Notation=TeX>$hbox{1}/f^{2}$</tex></formula> Spectrum of Mobility Fluctuation Noise in a Quantum Wire at Radio and Microwave Frequencies

Content Provider	IEEE Xplore Digital Library
Author	Agnihotri, P. Bandyopadhyay, S.
Copyright Year	1963
Abstract	We have studied the noise power spectrum associated with mobility fluctuations of hot carriers in a GaAs quantum wire in the frequency range of 20 MHz-50 GHz using ensemble Monte Carlo simulation. This frequency range is outside the regime where a noise peak occurs in quantum wires due to well-known streaming oscillations in the carrier drift velocity. In this frequency range, the noise power spectrum is found to exhibit a nearly universal 1/f^α dependence, where f is the frequency. The exponent α remains remarkably constant over a wide range of electric field and temperature, and varies between 1.96 and 1.98 as the driving electric field is varied from 500 V/cm to 10 kV/cm at two different temperatures of 30 and 77 K. The constancy of α and its value of ~ 2 may be related to the nature of electron-phonon interactions in quantum wires.
Sponsorship	IEEE Electron Devices Society
Starting Page	3101
Ending Page	3105
Page Count	5
File Size	162253
File Format	PDF
ISSN	00189383
Volume Number	57
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Low-frequency noise Wire Phonons Oscillators Gallium arsenide streaming oscillations mobility fluctuations quantum wire
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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