Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential

Abstract We investigate the electronic transport properties of a graphene sheet under the magnetic barriers and wells through the oscillating scalar potential combined with the static scalar potential barrier having two types of uniform and alternative profiles. We compute the total sideband transmi...

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Autores principales:	Fatemeh Pakdel, Mohammad Ali Maleki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a6834d78551f4cb38974dd0853c7e5fa
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spelling	oai:doaj.org-article:a6834d78551f4cb38974dd0853c7e5fa2021-12-02T18:02:43ZTransport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential10.1038/s41598-021-92614-02045-2322https://doaj.org/article/a6834d78551f4cb38974dd0853c7e5fa2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92614-0https://doaj.org/toc/2045-2322Abstract We investigate the electronic transport properties of a graphene sheet under the magnetic barriers and wells through the oscillating scalar potential combined with the static scalar potential barrier having two types of uniform and alternative profiles. We compute the total sideband transmission of the system by additional sidebands at energy, in presence of oscillating potential, $$V_1$$ V 1 , using the transfer-matrix formalism and the Floquet sidebands series. The oscillating potential, generally, suppresses the Klein tunneling and the confinement of the charge carriers. In the absence of $$V_1$$ V 1 , both profiles show the wave vector filtering effect for the carriers by controlling the energy E relative to the potential barrier height, $$V_0$$ V 0 . The $$(N-1)$$ ( N - 1 ) -fold resonance splittings are observed through a region around $$E=V_0$$ E = V 0 with reduction of the transmission. The transmission vanishes in this region upon increasing the number of magnetic blocks N, strength of the magnetic field B in both configurations. We present an estimate relation for the width of the reduction region expressed in terms of E, $$V_0$$ V 0 , B and the angle of incidence of the quasiparticles. We observe, in the second profile, $$(N-1)$$ ( N - 1 ) -fold resonances in the transmission for special values of $$E=V_0$$ E = V 0 with a separation depending on the width of the magnetic blocks. The magnetic field and the width of the magnetic blocks have critical values, where the transmission reduces to zero. All the features observed in the transmission reflect to the conductance. In both configurations, there are some peaks in the conductance corresponding to the resonances of the transmission. The oscillations of the conductance are obtained which was observed in the experimental results. We, also, find the possibility for switching the transport properties of the system by changing the characteristic parameters of the magnetic system.Fatemeh PakdelMohammad Ali MalekiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fatemeh Pakdel Mohammad Ali Maleki Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
description	Abstract We investigate the electronic transport properties of a graphene sheet under the magnetic barriers and wells through the oscillating scalar potential combined with the static scalar potential barrier having two types of uniform and alternative profiles. We compute the total sideband transmission of the system by additional sidebands at energy, in presence of oscillating potential, $$V_1$$ V 1 , using the transfer-matrix formalism and the Floquet sidebands series. The oscillating potential, generally, suppresses the Klein tunneling and the confinement of the charge carriers. In the absence of $$V_1$$ V 1 , both profiles show the wave vector filtering effect for the carriers by controlling the energy E relative to the potential barrier height, $$V_0$$ V 0 . The $$(N-1)$$ ( N - 1 ) -fold resonance splittings are observed through a region around $$E=V_0$$ E = V 0 with reduction of the transmission. The transmission vanishes in this region upon increasing the number of magnetic blocks N, strength of the magnetic field B in both configurations. We present an estimate relation for the width of the reduction region expressed in terms of E, $$V_0$$ V 0 , B and the angle of incidence of the quasiparticles. We observe, in the second profile, $$(N-1)$$ ( N - 1 ) -fold resonances in the transmission for special values of $$E=V_0$$ E = V 0 with a separation depending on the width of the magnetic blocks. The magnetic field and the width of the magnetic blocks have critical values, where the transmission reduces to zero. All the features observed in the transmission reflect to the conductance. In both configurations, there are some peaks in the conductance corresponding to the resonances of the transmission. The oscillations of the conductance are obtained which was observed in the experimental results. We, also, find the possibility for switching the transport properties of the system by changing the characteristic parameters of the magnetic system.
format	article
author	Fatemeh Pakdel Mohammad Ali Maleki
author_facet	Fatemeh Pakdel Mohammad Ali Maleki
author_sort	Fatemeh Pakdel
title	Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
title_short	Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
title_full	Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
title_fullStr	Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
title_full_unstemmed	Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
title_sort	transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a6834d78551f4cb38974dd0853c7e5fa
work_keys_str_mv	AT fatemehpakdel transportpropertiesthroughgraphenewithsequenceofalternativemagneticbarriersandwellsinthepresenceoftimeperiodicscalarpotential AT mohammadalimaleki transportpropertiesthroughgraphenewithsequenceofalternativemagneticbarriersandwellsinthepresenceoftimeperiodicscalarpotential
_version_	1718378887505772544

Transport properties through graphene with sequence of alternative magnetic barriers and wells in the presence of time-periodic scalar potential

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