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Ultrathin SnTe films as a route towards all-in-one spintronics devices

Publication ,  Journal Article
Sławińska, J; Cerasoli, FT; Gopal, P; Costa, M; Curtarolo, S; Buongiorno Nardelli, M
Published in: 2D Materials
January 1, 2020

Spin transistors based on a semiconducting channel attached to ferromagnetic electrodes suffer from fast spin decay and extremely low spin injection/detection efficiencies. Here, we propose an alternative all-in-one spin device whose operation principle relies on electric manipulation of the spin lifetime in two-dimensional (2D) SnTe, in which the sizable spin Hall effect eliminates the need for using ferromagnets. In particular, we explore the persistent spin texture (PST) intrinsically present in the ferroelectric phase which protects the spin from decoherence and supports extraordinarily long spin lifetime. Our first-principles calculations followed by symmetry arguments revealed that such a spin wave mode can be externally detuned by perpendicular electric field, leading to spin randomization and decrease in spin lifetime. We further extend our analysis to ultrathin SnTe films and confirm the emergence of PST as well as a moderate enhancement of intrinsic spin Hall conductivity. The recent room-temperature observation of the ferroelectric phase in 2D-SnTe suggests that novel all-electric spintronics devices are within reach.

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Published In

2D Materials

DOI

EISSN

2053-1583

Publication Date

January 1, 2020

Volume

7

Issue

2

Related Subject Headings

  • 5104 Condensed matter physics
  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 1007 Nanotechnology
  • 0912 Materials Engineering
  • 0303 Macromolecular and Materials Chemistry
 

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Sławińska, J., Cerasoli, F. T., Gopal, P., Costa, M., Curtarolo, S., & Buongiorno Nardelli, M. (2020). Ultrathin SnTe films as a route towards all-in-one spintronics devices. 2D Materials, 7(2). https://doi.org/10.1088/2053-1583/ab6f7a
Sławińska, J., F. T. Cerasoli, P. Gopal, M. Costa, S. Curtarolo, and M. Buongiorno Nardelli. “Ultrathin SnTe films as a route towards all-in-one spintronics devices.” 2D Materials 7, no. 2 (January 1, 2020). https://doi.org/10.1088/2053-1583/ab6f7a.
Sławińska J, Cerasoli FT, Gopal P, Costa M, Curtarolo S, Buongiorno Nardelli M. Ultrathin SnTe films as a route towards all-in-one spintronics devices. 2D Materials. 2020 Jan 1;7(2).
Sławińska, J., et al. “Ultrathin SnTe films as a route towards all-in-one spintronics devices.” 2D Materials, vol. 7, no. 2, Jan. 2020. Scopus, doi:10.1088/2053-1583/ab6f7a.
Sławińska J, Cerasoli FT, Gopal P, Costa M, Curtarolo S, Buongiorno Nardelli M. Ultrathin SnTe films as a route towards all-in-one spintronics devices. 2D Materials. 2020 Jan 1;7(2).
Journal cover image

Published In

2D Materials

DOI

EISSN

2053-1583

Publication Date

January 1, 2020

Volume

7

Issue

2

Related Subject Headings

  • 5104 Condensed matter physics
  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 1007 Nanotechnology
  • 0912 Materials Engineering
  • 0303 Macromolecular and Materials Chemistry