Organic-to-inorganic structural chirality transfer in a 2D hybrid perovskite and impact on Rashba-Dresselhaus spin-orbit coupling.
Published
Journal Article
Translation of chirality and asymmetry across structural motifs and length scales plays a fundamental role in nature, enabling unique functionalities in contexts ranging from biological systems to synthetic materials. Here, we introduce a structural chirality transfer across the organic-inorganic interface in two-dimensional hybrid perovskites using appropriate chiral organic cations. The preferred molecular configuration of the chiral spacer cations, R-(+)- or S-(-)-1-(1-naphthyl)ethylammonium and their asymmetric hydrogen-bonding interactions with lead bromide-based layers cause symmetry-breaking helical distortions in the inorganic layers, otherwise absent when employing a racemic mixture of organic spacers. First-principles modeling predicts a substantial bulk Rashba-Dresselhaus spin-splitting in the inorganic-derived conduction band with opposite spin textures between R- and S-hybrids due to the broken inversion symmetry and strong spin-orbit coupling. The ability to break symmetry using chirality transfer from one structural unit to another provides a synthetic design paradigm for emergent properties, including Rashba-Dresselhaus spin-polarization for hybrid perovskite spintronics and related applications.
Full Text
Duke Authors
Cited Authors
- Jana, MK; Song, R; Liu, H; Khanal, DR; Janke, SM; Zhao, R; Liu, C; Valy Vardeny, Z; Blum, V; Mitzi, DB
Published Date
- September 17, 2020
Published In
Volume / Issue
- 11 / 1
Start / End Page
- 4699 -
PubMed ID
- 32943625
Pubmed Central ID
- 32943625
Electronic International Standard Serial Number (EISSN)
- 2041-1723
International Standard Serial Number (ISSN)
- 2041-1723
Digital Object Identifier (DOI)
- 10.1038/s41467-020-18485-7
Language
- eng