Journal
APPLIED PHYSICS LETTERS
Volume 116, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0009828
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Funding
- Ministry of Human Resource Development under the IMPRINT program [7519, 7058]
- Department of Electronics and Information Technology (DeitY)
- Science and Engineering Research Board (SERB) under the Core Research Grant (CRG) [SERB/F/12383/2018-2019]
- S. N. Bose National Centre for Basic Sciences [SNB/AB/18-19/211]
- Council of Scientific and Industrial Research (CSIR), India
- DST, Government of India [IF150922]
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We report on a direct measurement of sizable interfacial Dzyaloshinskii-Moriya interaction (iDMI) at the interface of two-dimensional transition metal dichalcogenide (2D-TMD), MoS 2 and Ni 80 Fe 20 (Py), using Brillouin light scattering spectroscopy. A clear asymmetry in spin-wave dispersion is measured in MoS 2/Py/Ta, while no such asymmetry is detected in the reference Py/Ta system. A linear scaling of the DMI constant with the inverse of Py thickness indicates the interfacial origin of the observed DMI. We further observe an enhancement of DMI constant in a three to four layer MoS 2/Py system (by 56%) as compared to that in two layer MoS 2/Py, which is caused by a higher density of MoO 3 defect species in the case of three to four layer MoS 2. The results open possibilities of spin-orbitronic applications utilizing the 2D-TMD-based heterostructures.
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