Molecular engineering of Rashba spin-charge converter

Hiroyasu Nakayama, Takashi Yamamoto, Hongyu An, Kento Tsuda, Yasuaki Einaga, Kazuya Ando

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In heterostructures with broken inversion symmetry, the electrons' motion is coupled to their spin through interface-driven spin-orbit coupling: the Rashba effect. The Rashba effect enables the interconversion between spin and charge currents, offering a variety of novel spintronic phenomena and functionalities. However, despite the significant progress in Rashba physics, controlling the spin-charge conversion in metallic heterostructures remains a major challenge. We show that molecular self-assembly provides a way to engineer the Rashba spin-charge converters. We demonstrate that magnetoresistance and voltage generation originating from the spin-charge conversion in metallic heterostructures can be manipulated by decorating the surface with selfassembled organic monolayers through the cooperative molecular field effect. We also demonstrate reversible phototuning of the spin-charge conversion through light-driven molecular transformations using a molecule that can photoisomerize between the trans and cis states. These findings, with the almost-infinite chemical tunability of organic monolayers, pave the way toward molecular engineering of spin-orbit devices.

Original languageEnglish
Article numbereaar3899
JournalScience advances
Volume4
Issue number3
DOIs
Publication statusPublished - 2018 Mar 23

ASJC Scopus subject areas

  • Medicine(all)

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