Spin contribution to the instability of THz plasma waves

When the boundary conditions of the source and drain are asymmetric, the plasma waves may become unstable in the channel of a field effect transistor (FET). We use the quantum magnetohydrodynamic model to study the influence of the quantum Bohm potential, Fermi statistical pressure, and electron spi...

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Main Authors:	Chenxiao Liu, Liping Zhang, Jiangxu Feng
Format:	Article
Language:	English
Published:	AIP Publishing LLC 2021-08-01
Series:	AIP Advances
Online Access:	http://dx.doi.org/10.1063/5.0056132

id	doaj-4dcfec87fc5e4bc2bef6a3eb22e13f56
record_format	Article
spelling	doaj-4dcfec87fc5e4bc2bef6a3eb22e13f562021-09-03T11:18:12ZengAIP Publishing LLCAIP Advances2158-32262021-08-01118085207085207-710.1063/5.0056132Spin contribution to the instability of THz plasma wavesChenxiao Liu0Liping Zhang1Jiangxu Feng2School of Science, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Science, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Science, Lanzhou University of Technology, Lanzhou 730050, ChinaWhen the boundary conditions of the source and drain are asymmetric, the plasma waves may become unstable in the channel of a field effect transistor (FET). We use the quantum magnetohydrodynamic model to study the influence of the quantum Bohm potential, Fermi statistical pressure, and electron spin effects on the stability of THz plasma waves propagating perpendicular to the magnetic field in the FET. A dispersion equation governing the THz plasma oscillation is obtained. Numerical results have shown that the presence of spin effects has enlarged the instable range of β, enhanced the instability increment, and made the frequency of THz plasma waves larger. The research shows that nanometer FETs with spin effects have advantages in realizing practical terahertz radiation.http://dx.doi.org/10.1063/5.0056132
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Chenxiao Liu Liping Zhang Jiangxu Feng
spellingShingle	Chenxiao Liu Liping Zhang Jiangxu Feng Spin contribution to the instability of THz plasma waves AIP Advances
author_facet	Chenxiao Liu Liping Zhang Jiangxu Feng
author_sort	Chenxiao Liu
title	Spin contribution to the instability of THz plasma waves
title_short	Spin contribution to the instability of THz plasma waves
title_full	Spin contribution to the instability of THz plasma waves
title_fullStr	Spin contribution to the instability of THz plasma waves
title_full_unstemmed	Spin contribution to the instability of THz plasma waves
title_sort	spin contribution to the instability of thz plasma waves
publisher	AIP Publishing LLC
series	AIP Advances
issn	2158-3226
publishDate	2021-08-01
description	When the boundary conditions of the source and drain are asymmetric, the plasma waves may become unstable in the channel of a field effect transistor (FET). We use the quantum magnetohydrodynamic model to study the influence of the quantum Bohm potential, Fermi statistical pressure, and electron spin effects on the stability of THz plasma waves propagating perpendicular to the magnetic field in the FET. A dispersion equation governing the THz plasma oscillation is obtained. Numerical results have shown that the presence of spin effects has enlarged the instable range of β, enhanced the instability increment, and made the frequency of THz plasma waves larger. The research shows that nanometer FETs with spin effects have advantages in realizing practical terahertz radiation.
url	http://dx.doi.org/10.1063/5.0056132
work_keys_str_mv	AT chenxiaoliu spincontributiontotheinstabilityofthzplasmawaves AT lipingzhang spincontributiontotheinstabilityofthzplasmawaves AT jiangxufeng spincontributiontotheinstabilityofthzplasmawaves
_version_	1717817437075800064

Spin contribution to the instability of THz plasma waves

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