Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction
With the fabrication of gapped graphene, interest in the tunneling spectroscopy in graphene-based FG/SG junctions in which one side consists of a gapless ferro-magnetic graphene (FG) and the other side, of a gapped superconducting graphene (SG) has arisen. The carriers in the gapless (gapped) graphe...
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th-mahidol.402472023-04-12T15:27:47Z Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction Bumned Soodchomshom บำเหน็จ สุดชมโฉม Tang, I.-M. Rassmidara Hoonsawat รัศมีดารา หุ่นสวัสดิ์ Mahidol University International College. Ferromagnet/superconductor junction Gapped graphene Massive Dirac electron Specular Andreev reflection Spin transport With the fabrication of gapped graphene, interest in the tunneling spectroscopy in graphene-based FG/SG junctions in which one side consists of a gapless ferro-magnetic graphene (FG) and the other side, of a gapped superconducting graphene (SG) has arisen. The carriers in the gapless (gapped) graphene are 2D relativistic particles having an energy spectrum given by E = sqrt( 2 vF 2 k2 +(mvF 2)2) (where mvF 2 is the gap and vF is the Fermi velocity). The spin currents in this FG/SG junction are obtained within the framework of the extended Blonder-Tinkham-Klapwijk (BTK) formalism. The effects of the superconducting energy gap in SG, of the gap mvF 2 which opened in the superconducting graphene, of the exchange field in FG, of the spin-dependent specular Andreev reflection, of the effective Fermi energy (EFF) of FG and of the bias voltage across the junction (V) are simulated. It is seen that by adjusting EFF or V, the spin polarization (defined as SP(%) = 100% × (G↑ - G↓)/(G↑ + G↓)) can be switched from a pure spin up (SP = +100%) state to pure spin down (SP = -100%) state. 2015-08-03T09:35:59Z 2018-12-25T09:12:10Z 2015-08-03T09:35:59Z 2018-12-25T09:12:10Z 2015 2010 Article Physica C: Superconductivity and its Applications. Vol. 470, No.1 (2010), 31-36. https://repository.li.mahidol.ac.th/handle/123456789/40247 eng Mahidol University ScienceDirect |
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Ferromagnet/superconductor junction Gapped graphene Massive Dirac electron Specular Andreev reflection Spin transport |
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Ferromagnet/superconductor junction Gapped graphene Massive Dirac electron Specular Andreev reflection Spin transport Bumned Soodchomshom บำเหน็จ สุดชมโฉม Tang, I.-M. Rassmidara Hoonsawat รัศมีดารา หุ่นสวัสดิ์ Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
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With the fabrication of gapped graphene, interest in the tunneling spectroscopy in graphene-based FG/SG junctions in which one side consists of a gapless ferro-magnetic graphene (FG) and the other side, of a gapped superconducting graphene (SG) has arisen. The carriers in the gapless (gapped) graphene are 2D relativistic particles having an energy spectrum given by E = sqrt( 2 vF 2 k2 +(mvF 2)2) (where mvF 2 is the gap and vF is the Fermi velocity). The spin currents in this FG/SG junction are obtained within the framework of the extended Blonder-Tinkham-Klapwijk (BTK) formalism. The effects of the
superconducting energy gap in SG, of the gap mvF 2 which opened in the superconducting graphene, of the exchange field in FG, of the spin-dependent specular Andreev reflection, of the effective Fermi energy (EFF) of FG and of
the bias voltage across the junction (V) are simulated. It is seen that by adjusting EFF or V, the spin polarization (defined as SP(%) = 100% × (G↑ - G↓)/(G↑ + G↓)) can be switched from a pure spin up (SP = +100%) state to pure
spin down (SP = -100%) state. |
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Mahidol University International College. |
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Mahidol University International College. Bumned Soodchomshom บำเหน็จ สุดชมโฉม Tang, I.-M. Rassmidara Hoonsawat รัศมีดารา หุ่นสวัสดิ์ |
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Article |
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Bumned Soodchomshom บำเหน็จ สุดชมโฉม Tang, I.-M. Rassmidara Hoonsawat รัศมีดารา หุ่นสวัสดิ์ |
author_sort |
Bumned Soodchomshom |
title |
Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
title_short |
Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
title_full |
Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
title_fullStr |
Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
title_full_unstemmed |
Perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
title_sort |
perfect switching of the spin polarization in a ferromagnetic gapless graphene/superconducting gapped graphene junction |
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2015 |
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https://repository.li.mahidol.ac.th/handle/123456789/40247 |
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1781415344632496128 |