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Title: Rashba torque beyond the Boltzmann regime

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1371954
Grant/Contract Number:
FG03-02ER45958
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 3; Related Information: CHORUS Timestamp: 2017-07-19 22:13:52; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Xiao, Cong, and Niu, Qian. Rashba torque beyond the Boltzmann regime. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.035423.
Xiao, Cong, & Niu, Qian. Rashba torque beyond the Boltzmann regime. United States. doi:10.1103/PhysRevB.96.035423.
Xiao, Cong, and Niu, Qian. 2017. "Rashba torque beyond the Boltzmann regime". United States. doi:10.1103/PhysRevB.96.035423.
@article{osti_1371954,
title = {Rashba torque beyond the Boltzmann regime},
author = {Xiao, Cong and Niu, Qian},
abstractNote = {},
doi = {10.1103/PhysRevB.96.035423},
journal = {Physical Review B},
number = 3,
volume = 96,
place = {United States},
year = 2017,
month = 7
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 19, 2018
Publisher's Accepted Manuscript

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  • Cited by 4
  • The Rashba-Edelstein effect stems from the interaction between the electron's spin and its momentum induced by spin-orbit interaction at an interface or a surface. It was shown that the inverse Rashba-Edelstein effect can be used to convert a spin current into a charge current. Here, we demonstrate the reverse process of a charge-to spin-current conversion at a Bi/Ag Rashba interface. We show that this interface-driven spin current can drive an adjacent ferromagnet to resonance. We employ a spin-torque ferromagnetic resonance excitation/detection scheme which was developed originally for a bulk spin-orbital effect, the spin Hall effect. In our experiment, the directmore » Rashba-Edelstein effect generates an oscillating spin current from an alternating charge current driving the magnetization precession in a neighboring permalloy (Py, Ni 80Fe 20) layer. As a result, electrical detection of the magnetization dynamics is achieved by a rectificationmechanism of the time dependent multilayer resistance arising from the anisotropic magnetoresistance.« less
  • The Rashba-Edelstein effect stems from the interaction between the electron’s spin and its momentum induced by spin-orbit interaction at an interface or a surface. It was shown that the inverseRashba- Edelstein effect can be used to convert a spin- into a charge current. Here, we demonstrate that a Bi/Ag Rashba interface can even drive an adjacent ferromagnet to resonance. We employ a spin-torque ferromagnetic resonance excitation/detection scheme which was developed originally for a bulk spin-orbital effect, the spin Hall effect. In our experiment, the direct Rashba-Edelstein effect generates an oscillating spin current from an alternating charge current driving the magnetizationmore » precession in a neighboring permalloy (Py, Ni80Fe20) layer. Electrical detection of the magnetization dynamics is achieved by a rectification mechanism of the time dependent multilayer resistance arising from the anisotropic magnetoresistance.« less
  • The effect of Rashba spin-orbit coupling on the nonlinear optical conductivity in a bilayer graphene is investigated. We demonstrate the very different role played by the Rashba term and interlayer hopping; in some cases, the two roles can be quite opposite. It is found that the Rashba term can either enhance or suppress the nonlinear effect in a bilayer graphene, depending on the strength of the interlayer hopping. For a weak interlayer hopping, the Rashba term can significantly enhance the nonlinear effect. An analytical result was derived, showing the interplay of the Rashba effect and the interlayer hopping effect.
  • Torque measurements made at different temperatures below {ital T}{sub {ital c}} show a gradual crossover from reversible to mainly irreversible behavior as the temperature is lowered. The irreversible term at low temperature shows a strong peak for the field oreintation near the {ital ab} plane, which can be interpreted as being due to a Bean-mechanism effect. The data indicate that a reversible term, due to disalignment of the flux lines, is still present at low temperatures.