%0 Journal Article %1 WOS:000428259800074 %A Silva, P V %A Saraiva-Souza, A %A Maia, D W %A Souza, F M %A Filho, A G Souza %A Meunier, V %A Girao, E C %C RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS %D 2018 %I ELSEVIER %J JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS %K 11-AGNR; Electron Molecular NEGF-DFT; electronics; transport} {Rhombic-GQD; %P 532-539 %R 10.1016/j.jmmm.2017.11.089 %T High efficiency spin-valve and spin-filter in a doped rhombic graphene quantum dot device %V 451 %X Spin-polarized transport through a rhombic graphene quantum dot (rGQD) attached to armchair graphene nanoribbon (AGNR) electrodes is investigated by means of the Green's function technique combined with single-band tight-binding (TB) approach including a Hubbard-like term. The Hubbard repulsion was included within the mean-field approximation. Compared to anti-ferromagnetic (AFM), we show that the ferromagnetic (FM) ordering of the rGQD corresponds to a smaller bandgap, thus resulting in an efficient spin injector. As a consequence, the electron transport spectrum reveals a spin valve effect, which is controlled by doping with B/N atoms creating a p-n-type junction. The calculations point out that such systems can be used as spin-filter devices with efficiency close to a 100%. (C) 2017 Elsevier B.V. All rights reserved.

@article{WOS:000428259800074, abstract = {Spin-polarized transport through a rhombic graphene quantum dot (rGQD) attached to armchair graphene nanoribbon (AGNR) electrodes is investigated by means of the Green's function technique combined with single-band tight-binding (TB) approach including a Hubbard-like term. The Hubbard repulsion was included within the mean-field approximation. Compared to anti-ferromagnetic (AFM), we show that the ferromagnetic (FM) ordering of the rGQD corresponds to a smaller bandgap, thus resulting in an efficient spin injector. As a consequence, the electron transport spectrum reveals a spin valve effect, which is controlled by doping with B/N atoms creating a p-n-type junction. The calculations point out that such systems can be used as spin-filter devices with efficiency close to a 100%. (C) 2017 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS}, author = {Silva, P V and Saraiva-Souza, A and Maia, D W and Souza, F M and Filho, A G Souza and Meunier, V and Girao, E C}, biburl = {https://www.bibsonomy.org/bibtex/21f6daa030687cbaf2d4193c1b9168cd2/ppgfis_ufc_br}, doi = {10.1016/j.jmmm.2017.11.089}, interhash = {d87c2d5fb0416cf3d226b09892609d4c}, intrahash = {1f6daa030687cbaf2d4193c1b9168cd2}, issn = {0304-8853}, journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}, keywords = {11-AGNR; Electron Molecular NEGF-DFT; electronics; transport} {Rhombic-GQD;}, pages = {532-539}, publisher = {ELSEVIER}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {High efficiency spin-valve and spin-filter in a doped rhombic graphene quantum dot device}, tppubtype = {article}, volume = 451, year = 2018 }