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7 results on '"Dainone, Pambiang Abel"'

1. Controlling the helicity of light by electrical magnetization switching

Author

Dainone, Pambiang Abel, Prestes, Nicholas Figueiredo, Renucci, Pierre, Bouché, Alexandre, Morassi, Martina, Devaux, Xavier, Lindemann, Markus, George, Jean-Marie, Jaffrès, Henri, Lemaitre, Aristide, Xu, Bo, Stoffel, Mathieu, Chen, Tongxin, Lombez, Laurent, Lagarde, Delphine, Cong, Guangwei, Ma, Tianyi, Pigeat, Philippe, Vergnat, Michel, Rinnert, Hervé, Marie, Xavier, Han, Xiufeng, Mangin, Stephane, Rojas-Sánchez, Juan-Carlos, Wang, Jian-Ping, Beard, Matthew C., Gerhardt, Nils C., Žutić, Igor, and Lu, Yuan

Published
2024
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2. Epitaxial Au/Fe4N/MgO thin films on GaAs (001) substrates.

Author

Dainone, Pambiang Abel, Stoffel, Mathieu, Chen, Tongxin, Pasquier, Ludovic, Bouché, Alexandre, Devaux, Xavier, Vergnat, Michel, Boulet, Pascal, and Lu, Yuan

Subjects
*MOLECULAR beam epitaxy, *ANALYTICAL chemistry, *SUBSTRATES (Materials science), *THIN films, *EPITAXY
Abstract

We investigate the growth of Au/FexNy/MgO trilayers on GaAs(001) substrates by plasma-assisted molecular beam epitaxy. The optimization of the growth conditions made it possible to obtain the compound of stoichiometric Fe4N. Microstructural studies show that Fe4N forms 3D islands at the initial stages of growth. As the Fe4N thickness increases, a columnar growth sets in leading to a strong texturing and to the formation of grains having the same crystallographic orientation. The growth is epitaxial with the relationship GaAs (001) [110]//MgO (001) [110]//Fe4N (001) [110]//Au (012) [0–32]. A chemical analysis at the nanoscale reveals that the interfaces are rather sharp with a limited interdiffusion. Magnetic characterizations show that a trilayer containing a 1-nm-thick Fe4N layer is already ferromagnetic. The easy magnetization axis is in-plane independent of the Fe4N layer thickness (from 1 to 6 nm). This study shows the potential to use Fe4N as a spin injector for spin-optoelectronic applications. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Author Correction: Controlling the helicity of light by electrical magnetization switching

Author

Dainone, Pambiang Abel, Prestes, Nicholas Figueiredo, Renucci, Pierre, Bouché, Alexandre, Morassi, Martina, Devaux, Xavier, Lindemann, Markus, George, Jean-Marie, Jaffrès, Henri, Lemaitre, Aristide, Xu, Bo, Stoffel, Mathieu, Chen, Tongxin, Lombez, Laurent, Lagarde, Delphine, Cong, Guangwei, Ma, Tianyi, Pigeat, Philippe, Vergnat, Michel, Rinnert, Hervé, Marie, Xavier, Han, Xiufeng, Mangin, Stephane, Rojas-Sánchez, Juan-Carlos, Wang, Jian-Ping, Beard, Matthew C., Gerhardt, Nils C., Žutić, Igor, and Lu, Yuan

Published
2024
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4. Room Temperature Spin to Charge Conversion in Amorphous Topological Insulating Gd-Alloyed BixSe1-x/CoFeB Bilayers

Author

Sahu, Protyush, Yang, Yifei, Fan, Yihong, Jaffres, Henri, Chen, Jun-Yang, Devaux, Xavier, Fagot-Revurat, Yannick, Migot, Sylvie, Rongione, Enzo, Dhillon, Sukdheep, Chen, Tongxin, Dainone, Pambiang Abel, George, Jean-Marie, Lu, Yuan, and Wang, Jian-Ping

Subjects
Condensed Matter - Materials Science
Abstract

Disordered topological insulator (TI) films have gained intense interest by benefiting from both the TIs exotic transport properties and the advantage of mass production by sputtering. Here, we report on the clear evidence of spin-charge conversion (SCC) in amorphous Gd-alloyed BixSe1-x (BSG)/CoFeB bilayers fabricated by sputtering, which could be related to the amorphous TI surface states. Two methods have been employed to study SCC in BSG/CoFeB(5 nm) bilayers with different BSG thicknesses. Firstly, spin pumping is used to generate a spin current in CoFeB and to detect SCC by inverse Edelstein effect. The maximum SCC efficiency (SCE) is measured as large as 0.035 nm in a 6 nm thick BSG sample, which shows a strong decay when tBSG increases due to the increase of BSG surface roughness. The second method is the THz time-domain spectroscopy, which reveals a small tBSG dependence of SCE, validating the occurrence of a pure interface state related SCC. Furthermore, our angle-resolved photoemission spectroscopy data show dispersive two-dimensional surface states that cross the bulk gap until to the Fermi level, strengthening the possibility of SCC due to the amorphous TI states. Our studies provide a new experimental direction towards the search for topological systems in the amorphous solids.

Published
2019

7. Room temperature spin to charge conversion in amorphous topological insulating Gd-alloyed BiSe/CoFeB bilayers

Author

Sahu, Protyush, Yang, Yifei, Fan, Yihong, Jaffres, Henri, Chen, Jun-Yang, Devaux, Xavier, Fagot-Revurat, Yannick, Migot, Sylvie, Rongione, Enzo, Dhillon, Sukdheep, Chen, Tongxin, Dainone, Pambiang Abel, George, Jean-Marie, Lu, Yuan, and Wang, Jian-Ping

Subjects
Condensed Matter - Materials Science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences
Abstract

Disordered Topological insulator (TI) films have gained intense interest by benefitting from both the TI's exotic properties and the advantage of mass production by sputtering. Here, we report on the clear evidence of spin-charge conversion (SCC) by amorphous TI states in Gd-alloyed BixSe1-x (BSG)/CoFeB bilayers fabricated by sputtering. Two methods have been employed to study SCC in BSG(tBSG=6-16nm)/CoFeB(5nm) bilayers with different BSG thicknesses. Firstly, spin pumping is used to generate a spin current in CoFeB and to detect SCC by inverse Edelstein effect (IEE). The maximum SCC efficiency (SCE) is measured as large as 0.035nm (IEE length {\lambda}IEE) in a 6nm thick BSG sample, which shows a strong decay when tBSG increases due to the increase of BSG surface roughness. The second method is the THz time-domain spectroscopy, which reveals a small tBSG dependence of SCE, validating the occurrence of a pure interface state related SCC. Furthermore, our angle-resolved photoemission spectroscopy data shows a dispersive two-dimensional surface state that crosses the bulk gap until to the Fermi level, proving the origin of SCC due to the amorphous TI states. Our studies provide a new experimental direction towards the search for topological systems in amorphous solids beyond crystalline solids.

Published
2019
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