Large Rashba unidirectional magnetoresistance in the Fe/Ge(111) interface states

@article{Guillet2021LargeRU,
  title={Large Rashba unidirectional magnetoresistance in the Fe/Ge(111) interface states},
  author={Thomas Guillet and Alain Marty and C{\'e}line Vergnaud and Matthieu Jamet and Carlo Zucchetti and Giovanni Isella and Quentin Barbedienne and Henri Jaffr{\`e}s and Nicolas Reyren and J.-M. George and Albert Fert},
  journal={Physical Review B},
  year={2021},
  volume={103},
  pages={064411}
}
The structure inversion asymmetry at surfaces and interfaces gives rise to the Rashba spin-orbit interaction (SOI), that breaks the spin degeneracy of surface or interface states. Hence, when an electric current runs through a surface or interface, this Rashba effect generates an effective magnetic field acting on the electron spin. This provides an additional tool to manipulate the spin state in materials such as Si and Ge possessing inversion symmetry in their bulk form. The existence of… 

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References

SHOWING 1-10 OF 31 REFERENCES
Determining the Rashba parameter from the bilinear magnetoresistance response in a two-dimensional electron gas
Two-dimensional (2D) Rashba systems have been intensively studied in the last decade due to their unconventional physics, tunability capabilities, and potential for spin-charge interconversion when
Observation of Large Unidirectional Rashba Magnetoresistance in Ge(111).
TLDR
This work investigates the variation of the electrical resistance of Ge(111) grown epitaxially on semi-insulating Si(111), and ascribes the origin of this magnetoresistance to the interplay between the externally applied magnetic field and the pseudomagnetic field generated by the current applied in the spin-splitted subsurface states.
Observation of Out-of-Plane Spin Texture in a SrTiO_{3}(111) Two-Dimensional Electron Gas.
TLDR
Relativistic electronic structure calculations indicate that the out-of-plane component is a ubiquitous property of oxide 2DEGs arising from strong crystal field effects and it is shown that the BMER response of the SrTiO_{3}(111) 2D EG is tunable and unexpectedly large.
Theory of bilinear magneto-electric resistance from topological-insulator surface states
We theoretically investigate a new kind of nonlinear magnetoresistance on the surface of three-dimensional topological insulators (TIs). At variance with the unidirectional magnetoresistance (UMR)
Tuning spin-charge interconversion with quantum confinement in ultrathin bismuth films
Spin-charge interconversion (SCI) phenomena have attracted a growing interest in the field of spintronics as means to detect spin currents or manipulate the magnetization of ferromagnets. The key
Bilinear magnetoelectric resistance as a probe of three-dimensional spin texture in topological surface states
Surface states of three-dimensional topological insulators exhibit the phenomenon of spin–momentum locking, whereby the orientation of an electron spin is determined by its momentum. Probing the spin
CMOS Scaling Trends and Beyond
TLDR
Trends in CMOS scaling over the past decade are described and some of the new device options and technology directions being explored to continue scaling into the future are discussed.
Evidence for spin-to-charge conversion by Rashba coupling in metallic states at the Fe/Ge(111) interface
TLDR
A giant spin-to-charge conversion in metallic states at the Fe/Ge(111) interface due to the Rashba coupling is shown and very large charge currents are generated by direct spin pumping into the interface states from 20 K to room temperature.
Experimental evidence for two-dimensional states localized in subsurface region of Ge(111)
Abstract The present study gives experimental evidence of two-dimensional electronic states localized in subsurface layers of a Ge(1 1 1) substrate, in which a monolayer of Pb adsorbed on a Ge(1 1 1)
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