DataVXAdvanced Optical MaterialsPaper
journal article·2022-12Open access

Piezoelectric Strain Control of Terahertz Spin Current

Avinash Chaurasiya, Ziqi Li, Rohit Medwal, Surbhi Gupta, John Rex Mohan, Yasuhiro Fukuma, Hironori Asada, Elbert E. M. Chia, Rajdeep Singh Rawat

Advanced Optical Materials· Volume 10· Issue 24
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Source abstract

Abstract

Abstract 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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Research context

Electronic materials

OpenAlex topics: Magnetic properties of thin films · 2D Materials and Applications · Heusler alloys: electronic and magnetic properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Natural Sciences and Science Education National Institute of Education Nanyang Technological University Singapore 637616 Singapore

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore

Department of Physics Indian Institute of Technology Kanpur Kanpur Uttar Pradesh 208016 India

Department of Physics and Information Technology Kyushu Institute of Technology Iizuka 820–8502 Japan

Research Center for Neuromorphic AI Hardware Kyushu Institute of Technology Kitakyushu 808‐0196 Japan

Graduate School of Sciences and Technology for Innovation Yamaguchi Universit Ube 755–8611 Japan

Funding

Ministry of Education - Singapore · National Research Foundation Singapore · Japan Society for the Promotion of Science

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