Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi1-xSbxtopological insulator

E. Rongione; L. Baringthon; D. She; G. Patriarche; R. Lebrun; A. Lemaitre; M. Morassi; N. Reyren; F. Bertran; S. Dhillon; P. Le Fevre; H. Jaffres; J. M. George

doi:10.1109/IRMMW-THz57677.2023.10299093

Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi_1-xSb_xtopological insulator

E. Rongione, L. Baringthon, D. She, G. Patriarche, R. Lebrun, A. Lemaitre, M. Morassi, N. Reyren, F. Bertran, S. Dhillon, P. Le Fevre, H. Jaffres, J. M. George

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We combine spin- and angle-resolved photoemission spectroscopy, and time-resolved THz emission spectroscopy to evidence that spin-charge conversion arises mainly from the surface state in Bi1x Sbx ultrathin films, down to few nanometers where confinement effects emerge. We correlate this large conversion efficiency, typically at the level of the bulk spin Hall effect from heavy metals, to the complex Fermi surface obtained from theoretical calculations of the inverse Rashba-Edelstein response. Both surface state robustness and sizeable conversion efficiency in epitaxial Bi1-x Sbx thin films bring new perspectives for ultra-low power magnetic random-access memories and broadband THz generation.

Original language	English
Title of host publication	IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves
Publisher	IEEE Computer Society
ISBN (Electronic)	9798350336603
DOIs	https://doi.org/10.1109/IRMMW-THz57677.2023.10299093
Publication status	Published - 1 Jan 2023
Externally published	Yes
Event	48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada Duration: 17 Sept 2023 → 22 Sept 2023

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Conference

Conference	48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Country/Territory	Canada
City	Montreal
Period	17/09/23 → 22/09/23

Access to Document

10.1109/IRMMW-THz57677.2023.10299093

Cite this

Rongione, E., Baringthon, L., She, D., Patriarche, G., Lebrun, R., Lemaitre, A., Morassi, M., Reyren, N., Bertran, F., Dhillon, S., Fevre, P. L., Jaffres, H., & George, J. M. (2023). Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi_1-xSb_xtopological insulator. In IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz57677.2023.10299093

@inproceedings{15fa0c2691e14705b4a9401a0d30c6c7,

title = "Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi1-xSbxtopological insulator",

abstract = "We combine spin- and angle-resolved photoemission spectroscopy, and time-resolved THz emission spectroscopy to evidence that spin-charge conversion arises mainly from the surface state in Bi1x Sbx ultrathin films, down to few nanometers where confinement effects emerge. We correlate this large conversion efficiency, typically at the level of the bulk spin Hall effect from heavy metals, to the complex Fermi surface obtained from theoretical calculations of the inverse Rashba-Edelstein response. Both surface state robustness and sizeable conversion efficiency in epitaxial Bi1-x Sbx thin films bring new perspectives for ultra-low power magnetic random-access memories and broadband THz generation.",

author = "E. Rongione and L. Baringthon and D. She and G. Patriarche and R. Lebrun and A. Lemaitre and M. Morassi and N. Reyren and F. Bertran and S. Dhillon and Fevre, \{P. Le\} and H. Jaffres and George, \{J. M.\}",

note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 ; Conference date: 17-09-2023 Through 22-09-2023",

year = "2023",

month = jan,

day = "1",

doi = "10.1109/IRMMW-THz57677.2023.10299093",

language = "English",

series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",

publisher = "IEEE Computer Society",

booktitle = "IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves",

}

Rongione, E, Baringthon, L, She, D, Patriarche, G, Lebrun, R, Lemaitre, A, Morassi, M, Reyren, N, Bertran, F, Dhillon, S, Fevre, PL, Jaffres, H & George, JM 2023, Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi_1-xSb_xtopological insulator. in IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves. International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, IEEE Computer Society, 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023, Montreal, Canada, 17/09/23. https://doi.org/10.1109/IRMMW-THz57677.2023.10299093

Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi_1-xSb_xtopological insulator. / Rongione, E.; Baringthon, L.; She, D. et al.
IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves. IEEE Computer Society, 2023. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi1-xSbxtopological insulator

AU - Rongione, E.

AU - Baringthon, L.

AU - She, D.

AU - Patriarche, G.

AU - Lebrun, R.

AU - Lemaitre, A.

AU - Morassi, M.

AU - Reyren, N.

AU - Bertran, F.

AU - Dhillon, S.

AU - Fevre, P. Le

AU - Jaffres, H.

AU - George, J. M.

PY - 2023/1/1

Y1 - 2023/1/1

N2 - We combine spin- and angle-resolved photoemission spectroscopy, and time-resolved THz emission spectroscopy to evidence that spin-charge conversion arises mainly from the surface state in Bi1x Sbx ultrathin films, down to few nanometers where confinement effects emerge. We correlate this large conversion efficiency, typically at the level of the bulk spin Hall effect from heavy metals, to the complex Fermi surface obtained from theoretical calculations of the inverse Rashba-Edelstein response. Both surface state robustness and sizeable conversion efficiency in epitaxial Bi1-x Sbx thin films bring new perspectives for ultra-low power magnetic random-access memories and broadband THz generation.

AB - We combine spin- and angle-resolved photoemission spectroscopy, and time-resolved THz emission spectroscopy to evidence that spin-charge conversion arises mainly from the surface state in Bi1x Sbx ultrathin films, down to few nanometers where confinement effects emerge. We correlate this large conversion efficiency, typically at the level of the bulk spin Hall effect from heavy metals, to the complex Fermi surface obtained from theoretical calculations of the inverse Rashba-Edelstein response. Both surface state robustness and sizeable conversion efficiency in epitaxial Bi1-x Sbx thin films bring new perspectives for ultra-low power magnetic random-access memories and broadband THz generation.

U2 - 10.1109/IRMMW-THz57677.2023.10299093

DO - 10.1109/IRMMW-THz57677.2023.10299093

M3 - Conference contribution

AN - SCOPUS:85177699375

T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

BT - IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves

PB - IEEE Computer Society

T2 - 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023

Y2 - 17 September 2023 through 22 September 2023

ER -

Rongione E, Baringthon L, She D, Patriarche G, Lebrun R, Lemaitre A et al. Spin-momentum locking and ultrafast spin-charge conversion in ultrathin epitaxial Bi_1-xSb_xtopological insulator. In IRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves. IEEE Computer Society. 2023. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/IRMMW-THz57677.2023.10299093