Journal
APPLIED PHYSICS LETTERS
Volume 110, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4979031
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Funding
- University of Maryland and the National Institute of Standards and Technology
- Center for Nanoscale Science and Technology [70NANB10H193]
- University of Maryland
- National Research Foundation of Korea (NRF) - Ministry of Education [2016R1A6A3A03008831]
- National Research Foundation of Korea (NRF) [2011-0030046, 2013R1A2A2A05006237]
- NRF [2011-0027905, NRF-2015M3D1A1070465]
- National Research Foundation of Korea [2016R1A6A3A03008831, 2013R1A2A2A05006237] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The Rashba effect leads to a chiral precession of the spins of moving electrons, while the Dzyaloshinskii-Moriya interaction (DMI) generates preference towards a chiral profile of local spins. We predict that the exchange interaction between these two spin systems results in a chiral magnetoresistance depending on the chirality of the local spin texture. We observe this magnetoresistance by measuring the domain wall (DW) resistance in a uniquely designed Pt/Co/Pt zigzag wire and by changing the chirality of the DW with applying an in-plane magnetic field. A chirality-dependent DW resistance is found, and a quantitative analysis shows a good agreement with a theory based on the Rashba model. Moreover, the DW resistance measurement allows us to independently determine the strength of the Rashba effect and the DMI simultaneously, and the result implies a possible correlation between the Rashba effect, the DMI, and the symmetric Heisenberg exchange. Published by AIP Publishing.
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