Spin-vibronics in interacting nonmagnetic molecular nanojunctions

Abstract

We show that in the presence of ferromagnetic electronic reservoirs and spin-dependent tunnel couplings, molecular vibrations in nonmagnetic single molecular transistors induce an effective intramolecular exchange magnetic field. It generates a finite spin-accumulation and -precession for the electrons confined on the molecular bridge and occurs under (non)equilibrium conditions. The effective exchange magnetic field is calculated here to lowest order in the tunnel coupling for a nonequilibrium transport setup. Coulomb interaction between electrons is taken into account as well as a finite electron-phonon coupling. We show that for realistic physical parameters, an effective spin-phonon coupling emerges. It is induced by quantum many-body interactions, which are either electron-phonon or Coulomb-like. We investigate the precession and accumulation of the confined spins as function of bias- and gate-voltages as well as their dependence on the angle enclosed by the magnetizations between the left and right reservoir.

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Cited by in corpus (9)

• Revealing attractive electron-electron interaction in a quantum dot by full counting statistics
• Relaxation dynamics in double-spin systems
• Iterative path-integral summations for the tunneling magnetoresistance in interacting quantum-dot spin valves
• Thermally induced charge current through long molecules
• Antiresonant quantum transport in ac driven molecular nanojunctions
• Interplay of Vibration and Coulomb Effects in Transport of Spin-Polarized Electrons in a Single-Molecule Transistor
• Interaction-induced current asymmetries in resonant transport through interacting quantum-dot spin valves revealed by iterative summation of path integrals
• Magnetic-State Controlled Molecular Vibrational Dynamics at Buried Molecular-Metal Interfaces
• Thermoelectric effects in tunneling of spin-polarized electrons in a molecular transistor