Dipole-Induced Inversion of Spin-Dependent Charge Transport through α-Helical Peptide-Based Single-Molecule Junctions.

ABSTRACT: We report on a remarkable phenomenon of interfacial electric dipole inversion coupled to changes in atomic spin densities that translates into the enantiomeric inversion of electron spin-dependent conductance in a 2-terminal single-molecule junction, consisting of a 22 amino acid chiral α-helical peptide sequence connecting two metal electrodes. This phenomenon is conventionally associated with the Chirality-Induced Spin Selectivity (CISS) effect and how it induces spin polarization and spin filtering of the electron transport along the main peptide axis. Here, the inversion of the spin-dependent charge transport behavior is achieved by keeping constant the chiral symmetry of the junction while inverting the direction of the internal electrical dipole moment running along the main helical

SUBMITTER: Aragones AC 

PROVIDER: S-EPMC12512102 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature