Spin-Polaronic Effects in Electric Shuttling in a Single Molecule Transistor with Magnetic Leads
arXiv:2003.01066 · doi:10.1016/j.physe.2020.114151
Abstract
Current-voltage characteristics of a spintromechanical device, in which spin-polarized electrons tunnel between magnetic leads with anti-parallel magnetization through a single level movable quantum dot, are calculated. New exchange- and electromechanical coupling-induced (spin-polaronic) effects that determine strongly nonlinear current-voltage characteristics were found. In the low-voltage regime of electron transport the voltage-dependent and exchange field-induced displacement of quantum dot towards the source electrode leads to nonmonotonic behavior of differential conductance that demonstrates the lifting of spin-polaronic effects by electric field. At high voltages the onset of electron shuttling results in the drop of current and negative differential conductance, caused by mechanically-induced increase of tunnel resistivities and exchange field-induced suppression of spin-flips in magnetic field. The dependence of these predicted spin effects on the oscillations frequency of the dot and the strength of electron-electron correlations is discussed.
arXiv comment8 pages, 4 figures
References in corpus (13)
- Spins in few-electron quantum dots
- Coherent control of a single electron spin with electric fields
- Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
- Shuttle Mechanism for Charge Transfer in Coulomb Blockade Nanostructures
- A nanomechanical resonator shuttling single electrons at radio frequencies
- Quantum Shuttle in Phase Space
- Shuttle Instability in Self-Assembled Coulomb Blockade Nanostructures
- Vibrational Instability due to Coherent Tunneling of Electrons
- Coulomb Promotion of Spin-Dependent Tunnelling
- DC voltage-sustained self-oscillation of a nano-mechanical electron shuttle
- Spintromechanics of a Magnetic Nanoshuttle
- Mechanically Induced Thermal Breakdown in Magnetic Shuttle Structures
- Coulomb-promoted spintromechanics in magnetic shuttle devices