DocumentCode :
2885422
Title :
Quantum 1/f noise in spintronics and the future of downscaling
Author :
Handel, Peter H. ; Tournier, Adam G.
Author_Institution :
Dept. of Phys. & Astron., Univ. of Missouri-St. Louis, St. Louis, MO, USA
fYear :
2013
fDate :
24-28 June 2013
Firstpage :
1
Lastpage :
4
Abstract :
Spintronics is a new direction in electronics. It contains many applications, including spin valves, GMR devices, “spin batteries,” spin-controlled electronic devices, and even spin-controlled wide-bandgap compound semiconductors due to the development of rare-earth-doped nitrides with ferromagnetic properties. Spintronics allows for manipulation of both the spin transport and the charge transported by the electrons. It allows the downscaling to lower device sizes and extension of Moore´s law to higher device densities, because it requires less energy to just control the spin of the electron, and the quantum 1/f noise associated with spin control is several orders of magnitude below that associated with conventional electronics. However, the injected spin-polarized current is subject to spin-flip due to various causes. The rate of each of these spin-flip currents is affected by quantum 1/f noise, because of the low-frequency photon emission amplitude that is associated with the elementary spin flip process, no matter what causes the spin flip. As a result, in a spin valve, the leakage current will show 1/f noise. In devices with injection and subsequent control of spin-polarized electrons, the effects obtained will also show this spintronic quantum 1/f noise. For instance, the light output of a spin-controlled LED will exhibit quantum 1/f intensity fluctuations. The present paper calculates the 1/f noise expected in spintronic currents. The spectral density of this fundamental 1/f noise is inherently proportional to the square of the current that is affected by it, but is also inversely proportional to the number of carriers defining this current. The latter dependence can cause the spectrum to be proportional to the first power of the current.
Keywords :
1/f noise; giant magnetoresistance; leakage currents; light emitting diodes; magnetoelectronics; spin valves; wide band gap semiconductors; GMR devices; LED; Moore law; ferromagnetic properties; leakage current; photon emission amplitude; quantum 1/f noise; rare-earth-doped nitrides; spin batteries; spin transport; spin valves; spin-controlled electronic devices; spin-flip currents; spin-polarized current; spintronics; wide-bandgap compound semiconductors; Fluctuations; Magnetoelectronics; Phase noise; Photonics; Quantum mechanics; Scattering; 1/f noise; Conventional quantum 1/f effect; Ferromagnetic Nitrides; GMR devices; Quantum 1/f noise; Spin valves; Spin-controlled compound semiconductor electronics; Spintronics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Noise and Fluctuations (ICNF), 2013 22nd International Conference on
Conference_Location :
Montpellier
Print_ISBN :
978-1-4799-0668-0
Type :
conf
DOI :
10.1109/ICNF.2013.6578975
Filename :
6578975
Link To Document :
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