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Schmidt CB, Priyadarshi S, Bieler M. Sub-picosecond temporal resolution of anomalous Hall currents in GaAs. Sci Rep. 2017;7(1):11241doi: 10.1038/s41598-017-11603-4.
Schmidt, C. B., Priyadarshi, S., & Bieler, M. (2017). Sub-picosecond temporal resolution of anomalous Hall currents in GaAs. Scientific reports, 7(1), 11241. https://doi.org/10.1038/s41598-017-11603-4
Schmidt, Christian B, et al. "Sub-picosecond temporal resolution of anomalous Hall currents in GaAs." Scientific reports vol. 7,1 (2017): 11241. doi: https://doi.org/10.1038/s41598-017-11603-4
Schmidt CB, Priyadarshi S, Bieler M. Sub-picosecond temporal resolution of anomalous Hall currents in GaAs. Sci Rep. 2017 Sep 11;7(1):11241. doi: 10.1038/s41598-017-11603-4. PMID: 28894193; PMCID: PMC5593959.
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Sci Rep. 2017 Sep 11;7(1):11241. doi: 10.1038/s41598-017-11603-4.

Sub-picosecond temporal resolution of anomalous Hall currents in GaAs.

Scientific reports

Christian B Schmidt, Shekhar Priyadarshi, Mark Bieler

Affiliations

  1. Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116, Braunschweig, Germany.
  2. Leibniz Institute of Photonic Technology, 07745, Jena, Germany.
  3. Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany.
  4. Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116, Braunschweig, Germany. [email protected].

PMID: 28894193 PMCID: PMC5593959 DOI: 10.1038/s41598-017-11603-4

Abstract

The anomalous Hall (AH) and spin Hall effects are important tools for the generation, control, and detection of spin and spin-polarized currents in solids and, thus, hold promises for future spintronic applications. Despite tremendous work on these effects, their ultrafast dynamic response is still not well explored. Here, we induce ultrafast AH currents in a magnetically-biased semiconductor by optical femtosecond excitation at room temperature. The currents' dynamics are studied by detecting the simultaneously emitted THz radiation. We show that the temporal shape of the AH currents can be extracted by comparing its THz radiation to the THz radiation emitted from optically induced currents whose temporal shape is well known. We observe a complex temporal shape of the AH currents suggesting that different microscopic origins contribute to the current dynamics. This is further confirmed by photon energy dependent measurements revealing a current inversion at low optical excitation intensities. Our work is a first step towards full time resolution of AH and spin Hall currents and helps to better understand the underlying microscopic origins, being a prerequisite for ultrafast spintronic applications using such currents.

References

  1. Phys Rev Lett. 2007 Apr 13;98(15):156601 - PubMed
  2. Phys Rev Lett. 1995 Mar 20;74(12):2315-2318 - PubMed
  3. Phys Rev B Condens Matter. 1993 Apr 15;47(16):10279-10291 - PubMed
  4. Phys Rev Lett. 2006 Jun 23;96(24):246601 - PubMed
  5. Phys Rev Lett. 2005 Feb 4;94(4):047204 - PubMed
  6. Sci Rep. 2013 Oct 31;3:3116 - PubMed
  7. Phys Rev B Condens Matter. 1994 Oct 15;50(16):11583-11591 - PubMed
  8. Nat Commun. 2016 Oct 31;7:13259 - PubMed
  9. Phys Rev Lett. 2015 Dec 18;115(25):257401 - PubMed
  10. J Phys Condens Matter. 2009 Jun 24;21(25):253202 - PubMed
  11. J Phys Condens Matter. 2012 May 30;24(21):213202 - PubMed
  12. Nat Commun. 2012 Jan 17;3:629 - PubMed
  13. Science. 2004 Dec 10;306(5703):1910-3 - PubMed
  14. Nat Mater. 2012 Apr 23;11(5):382-90 - PubMed

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