ONLINE - PhD Mid-term Seminar Series: Study of spin to charge conversion in high resistive BixSe1-x
Study of spin to charge conversion in high resistive BixSe1-x
Isabel Cristina Arango
Nanodevices Group, CIC nanoGUNE
The spin Hall effect and its inverse are very important phenomena occurring in materials with large spin-orbit coupling, which allow to create and detect spin currents in spintronic devices without the use of ferromagnetic materials. The spin-to-charge current conversion efficiency is given by the spin Hall angle θSH . Large θSH has been reported in topological insulators such as bismuth selenide (Bi2Se3) due to the spin-momentum locking occurring at the topologically protected surface states . Recently, large conversion efficiencies have been reported in sputtered amorphous BixSe1-x . Amorphous BixSe1-x is thus a promising material that can be used in the recently proposed magneto-electric spin-orbit (MESO) logic device by Intel , in which not only large θSH is needed, but also a large resistivity .
However, electrical spin injection in nanostructured devices have not been used in any of the previous works, which is required for a MESO device with integration with standard CMOS electronics. We were able to fabricate sputtered amorphous BixSe1-x nanostructures which display consistent semiconducting behavior with high resistivities. This result allows us to face the challenge of integrating sputtered amorphous BixSe1-x in lateral spin valve (LSV) devices in order to quantify spin-to-charge conversion in this material from an all-electrical technique.
 E. Sagasta et al., Physical Review B, 94 060412 (2016).
 Y. Wang et. al., Physical Review Letters, 114 257202 (2015).
 M. DC et al., Applied Physics Letters, 114 102401 (2019).
 M. DC et al., Nature Materials, 17 800-807 (2018).
 S. Manipatruni et al., Nature, 565 35-42 (2019).
 V. T. Pham et al., Nature Electronics 3, 309 (2020).
PhD Mid-term Seminar Series: Isabel Arango & José Manuel Pereira - CIC nanoGUNE
When: Oct 4, 2021 11:00 AM
Join Zoom Meetinghttps://us06web.zoom.us/meeting/register/tZcld-CrpzsuEtDyxCNHHNH03u9mi7yGSfo7
Thank you very much for your participation!
nanoGUNE online Webinar
Isabel Arango, Nanodevices Group