Journal
ADVANCED OPTICAL MATERIALS
Volume 10, Issue 24, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202201929
Keywords
ferroelectric; ferromagnet; heavy metal heterostructure; multiferroic spintronic emitter; phase reversal; piezoelectric strain; THz spin current
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Funding
- Ministry of Education, Singapore [MOE2019-T2-1-058, ARC 1/19 RSR]
- National Research Foundation [NRF-CRP21-2018-0003]
- Singapore Ministry of Education AcRF Tier 3 Programme Geometrical Quantum Materials [MOE2018-T3-1-002]
- Singapore National Research Foundation Competitive Research Programme The Next Generation of Spintronics with 2D Heterostructures [NRF-CRP22-2019-0004]
- JSPS [18H01862a, 19K21112]
- NTU-Research Scholarship (NTU-RSS)
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This study demonstrates the electric field-mediated piezoelectric strain control of photogenerated THz spin current pulse from a multiferroic spintronic emitter, opening up new possibilities for the development of efficient on-chip THz spintronics devices.
Electrical control of photogenerated terahertz (THz) spin current pulses from a spintronic emitter has been at the forefront for the development of scalable, cost-efficient, wideband optospintronic devices. Artificially combined ferroelectric and ferromagnet heterostructure provides the potential avenue to deterministically control the phase of THz spin current pulse through piezoelectric strain. Here, the electric field-mediated piezoelectric strain control of photogenerated THz spin current pulse from a multiferroic spintronic emitter is demonstrated. The phase reversal of the THz spin current pulse is obtained from the combined effect of piezoelectric strain and a small magnetic field applied opposite to the initial magnetization of the ferromagnet. The piezoelectric strain-controlled phase switching of THz spin current thus opens a door to develop efficient strain engineered scalable on-chip THz spintronics devices.
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