Kurpas, Marcin and Fabian, Jaroslav (2021) Intrinsic and extrinsic spin-orbit coupling and spin relaxation in monolayer PtSe2. PHYSICAL REVIEW B, 103 (12): 125409. ISSN 2469-9950, 2469-9969
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Monolayer PtSe2 is a semiconducting transition-metal dichalcogenide characterized by an indirect band gap, space inversion symmetry, and high carrier mobility. Strong intrinsic spin-orbit coupling and the possibility to induce extrinsic spin-orbit fields by gating make PtSe2 attractive for fundamental spin transport studies as well as for potential spintronics applications. We perform a systematic theoretical study of the spin-orbit coupling and spin relaxation in this material. Specifically, we employ first-principles methods to obtain the basic orbital and spin-orbital properties of PtSe2, also in the presence of an external transverse electric field. We calculate the spin mixing parameters b(2) and the spin-orbit fields Omega for the Bloch states of electrons and holes. This information allows us to predict the spin lifetimes due to the Elliott-Yafet and D'yakonov-Perel mechanisms. We find that b(2) is rather large, on the order of 10(-2) and 10(-1), while Omega varies strongly with doping, being about 10(3)-10(4) ns(-1) for carrier density in the interval 10(13)-10(14) cm(-2) at the electric field of 1 V/nm. We estimate the spin lifetimes to be on the picosecond level.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION-METAL-DICHALCOGENIDE; MOS2; ELECTRONS; PHOTOLUMINESCENCE |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Aug 2022 04:42 |
| Last Modified: | 25 Aug 2022 04:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46891 |
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