Chiral multiferroicity in two-dimensional hybrid organic-inorganic perovskites

Author:

Zheng HainingORCID,Ghosh Arup,Swamynadhan M. J.,Zhang QihanORCID,Wong Walter P. D.,Wu Zhenyue,Zhang Rongrong,Chen JingshengORCID,Cimpoesu Fanica,Ghosh Saurabh,Campbell Branton J.ORCID,Wang KaiORCID,Stroppa AlessandroORCID,Mahendiran RamanathanORCID,Loh Kian PingORCID

Abstract

AbstractChiral multiferroics offer remarkable capabilities for controlling quantum devices at multiple levels. However, these materials are rare due to the competing requirements of long-range orders and strict symmetry constraints. In this study, we present experimental evidence that the coexistence of ferroelectric, magnetic orders, and crystallographic chirality is achievable in hybrid organic-inorganic perovskites [(R/S)-β-methylphenethylamine]2CuCl4. By employing Landau symmetry mode analysis, we investigate the interplay between chirality and ferroic orders and propose a novel mechanism for chirality transfer in hybrid systems. This mechanism involves the coupling of non-chiral distortions, characterized by defining a pseudo-scalar quantity, $$\xi={{{{{\bf{p}}}}}}{{\cdot }}{{{{{\bf{r}}}}}}$$ ξ = p r ($${{{{{\bf{p}}}}}}$$ p represents the ferroelectric displacement vector and $${{{{{\bf{r}}}}}}$$ r denotes the ferro-rotational vector), which distinguishes between (R)- and (S)-chirality based on its sign. Moreover, the reversal of this descriptor’s sign can be associated with coordinated transitions in ferroelectric distortions, Jahn-Teller antiferro-distortions, and Dzyaloshinskii-Moriya vectors, indicating the mediating role of crystallographic chirality in magnetoelectric correlations.

Publisher

Springer Science and Business Media LLC

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