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Title: Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO

Abstract

Insulating antiferromagnets are efficient and robust conductors of spin current. To realise the full potential of these materials within spintronics, the outstanding challenges are to demonstrate scalability down to nanometric lengthscales and the transmission of coherent spin currents. Here, we report the coherent transfer of spin angular momentum by excitation of evanescent spin waves of GHz frequency within antiferromagnetic NiO at room temperature. Using element-specific and phase-resolved x-ray ferromagnetic resonance, we probe the injection and transmission of ac spin current, and demonstrate that insertion of a few nanometre thick epitaxial NiO(001) layer between a ferromagnet and non-magnet can even enhance the flow of spin current. Our results pave the way towards coherent control of the phase and amplitude of spin currents at the nanoscale, and enable the realization of spin-logic devices and spin current amplifiers that operate at GHz and THz frequencies.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [3]; ORCiD logo [1];  [4];  [5];  [5];  [4];  [4]; ORCiD logo [6]; ORCiD logo [3]; ORCiD logo [5]; ORCiD logo [1]
  1. University of Exeter, Exeter (United Kingdom)
  2. University of Exeter, Exeter (United Kingdom); National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan). Spintronics Research Center
  3. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  5. Univ. of California, Berkeley, CA (United States)
  6. Univ. of Oxford (United Kingdom). Clarendon Lab.
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Engineering and Physical Sciences Research Council (EPSRC); Japan Society for the Promotion of Science (JSPS)
OSTI Identifier:
1633292
Grant/Contract Number:  
AC02-05CH11231; EP/P021190/1; EP/P020151/1; EP/P02047X/1; EP/L015331/1
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Dąbrowski, Maciej, Nakano, Takafumi, Burn, David M., Frisk, Andreas, Newman, David G., Klewe, Christoph, Li, Qian, Yang, Mengmeng, Shafer, Padraic, Arenholz, Elke, Hesjedal, Thorsten, van der Laan, Gerrit, Qiu, Zi Q., and Hicken, Robert J. Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO. United States: N. p., 2020. Web. doi:10.1103/physrevlett.124.217201.
Dąbrowski, Maciej, Nakano, Takafumi, Burn, David M., Frisk, Andreas, Newman, David G., Klewe, Christoph, Li, Qian, Yang, Mengmeng, Shafer, Padraic, Arenholz, Elke, Hesjedal, Thorsten, van der Laan, Gerrit, Qiu, Zi Q., & Hicken, Robert J. Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO. United States. https://doi.org/10.1103/physrevlett.124.217201
Dąbrowski, Maciej, Nakano, Takafumi, Burn, David M., Frisk, Andreas, Newman, David G., Klewe, Christoph, Li, Qian, Yang, Mengmeng, Shafer, Padraic, Arenholz, Elke, Hesjedal, Thorsten, van der Laan, Gerrit, Qiu, Zi Q., and Hicken, Robert J. Tue . "Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO". United States. https://doi.org/10.1103/physrevlett.124.217201. https://www.osti.gov/servlets/purl/1633292.
@article{osti_1633292,
title = {Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO},
author = {Dąbrowski, Maciej and Nakano, Takafumi and Burn, David M. and Frisk, Andreas and Newman, David G. and Klewe, Christoph and Li, Qian and Yang, Mengmeng and Shafer, Padraic and Arenholz, Elke and Hesjedal, Thorsten and van der Laan, Gerrit and Qiu, Zi Q. and Hicken, Robert J.},
abstractNote = {Insulating antiferromagnets are efficient and robust conductors of spin current. To realise the full potential of these materials within spintronics, the outstanding challenges are to demonstrate scalability down to nanometric lengthscales and the transmission of coherent spin currents. Here, we report the coherent transfer of spin angular momentum by excitation of evanescent spin waves of GHz frequency within antiferromagnetic NiO at room temperature. Using element-specific and phase-resolved x-ray ferromagnetic resonance, we probe the injection and transmission of ac spin current, and demonstrate that insertion of a few nanometre thick epitaxial NiO(001) layer between a ferromagnet and non-magnet can even enhance the flow of spin current. Our results pave the way towards coherent control of the phase and amplitude of spin currents at the nanoscale, and enable the realization of spin-logic devices and spin current amplifiers that operate at GHz and THz frequencies.},
doi = {10.1103/physrevlett.124.217201},
journal = {Physical Review Letters},
number = 21,
volume = 124,
place = {United States},
year = {Tue May 26 00:00:00 EDT 2020},
month = {Tue May 26 00:00:00 EDT 2020}
}

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