Vibration-induced modulation of magnetic anisotropy in a magnetic molecule
arXiv:1804.00142 · doi:10.1103/PhysRevB.97.235441
Abstract
We theoretically analyze the spectrum of a magnetic molecule when its charge and spin can couple to the molecular vibrations. More specifically, we show that the interplay between charge-vibron and spin-vibron coupling leads to a renormalization of the magnetic anisotropy parameters of the molecule. This effect is discussed for a model device consisting of an individual magnetic molecule embedded in a junction. We study the transport properties of the device and illustrate how the differential conductance is affected by the vibrationally induced renormalization of the magnetic anisotropy. Depending on the total molecular spin and the bare (intrinsic) magnetic anisotropy, the induced modulation can lead to visible shifts and crossings in the spectrum, and it can even be the cause of a transport blockade. It is therefore of particular interest to use mechanically controllable break junctions, since in such a case, the relevant coupling between the molecular spin and vibrations can be controlled via deformations of the molecule when stretching or compressing the junction.
arXiv comment18 pages, 7 figures, version as published
References in corpus (31)
- Supramolecular Spin Valves
- Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
- Franck-Condon blockade and giant Fano factors in transport through single molecules
- Phonon effects in molecular transistors: Quantum and classical treatment
- Mesoscopic quantum transport: Resonant tunneling in the presence of strong Coulomb interaction
- Resonant tunneling through ultrasmall quantum dots: zero-bias anomalies, magnetic field dependence, and boson-assisted transport
- Thermally Activated Resonant Magnetization Tunneling in Molecular Magnets: Mn_12Ac and others
- Electrical generation and absorption of phonons in carbon nanotubes
- Inelastic electron tunneling via molecular vibrations in single-molecule transistors
- Franck-Condon blockade in suspended carbon nanotube quantum dots
- Theory of the Franck-Condon blockade regime
- Tunneling in suspended carbon nanotubes assisted by longitudinal phonons
- Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime
- Electric Field Controlled Magnetic Anisotropy in a Single Molecule
- Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes
- Real-Space Tailoring of the Electron-Phonon Coupling in Ultra-Clean Nanotube Mechanical Resonators
- Franck-Condon Blockade in a Single-Molecule Transistor
- Spin-orbit-induced strong coupling of a single spin to a nanomechanical resonator
- Universal mechanism of spin relaxation in solids
- Spintronic magnetic anisotropy
- Spin relaxation in Mn12-acetate
- Vibrational Excitations in Weakly Coupled Single-Molecule Junctions: A Computational Analysis
- Ground-state cooling of a carbon nanomechanical resonator by spin-polarized current
- Transport through quantum-dot spin valves containing magnetic impurities
- Readout of carbon nanotube vibrations based on spin-phonon coupling
- Probing Transverse Magnetic Anisotropy by Electronic Transport through a Single-Molecule Magnet
- Control of vibrational states by spin-polarized transport in a carbon nanotube resonator
- Electron-vibron coupling effects on electron transport via a single-molecule magnet
- Dynamical magnetic anisotropy and quantum phase transitions in a vibrating spin-1 molecular junction
- Transition rates for a S \ge 1 model coupled to a phonon bath
- Spin-Atomic Vibration Interaction and Spin-Flip Hamiltonian of a Single Atomic Spin in a Crystal Field