Piezoelectric strain control of terahertz spin current

Piezoelectric strain control of terahertz spin current

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 av...

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Bibliographic Details
Main Authors: Chaurasiya, Avinash, Li, Ziqi, Medwal, Rohit, Gupta, Surbhi, Mohan, John Rex, Fukuma, Yasuhiro, Asada, Hironori, Chia, Elbert E. M., Rawat, Rajdeep Singh
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2023
Subjects:
Science::Physics
Phase Reversal
Piezoelectric Strain
Online Access:https://hdl.handle.net/10356/164928
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Institution: Nanyang Technological University
Language: English
Description
Summary: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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