Dynamical magnetic anisotropy and quantum phase transitions in a vibrating spin-1 molecular junction
arXiv:1204.1108 · doi:10.1103/PhysRevB.86.035437
Abstract
We study the electronic transport through a spin-1 molecule in which mechanical stretching produces a magnetic anisotropy. In this type of device, a vibron mode along the stretching axis will couple naturally to the molecular spin. We consider a single molecular vibrational mode and find that the electron-vibron interaction induces an effective correction to the magnetic anisotropy that shifts the ground state of the device toward a non-Fermi liquid phase. A transition into a Fermi liquid phase could then be achieved, by means of mechanical stretching, passing through an underscreened spin-1 Kondo regime. We present numerical renormalization group results for the differential conductance, the spectral density, and the magnetic susceptibility across the transition.
7 pages, 7 figures
References in corpus (33)
- Time-dependent transport in interacting and non-interacting mesoscopic systems
- The numerical renormalization group method for quantum impurity systems
- Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
- Phonon effects in molecular transistors: Quantum and classical treatment
- Quantum phase transition in a single-molecule quantum dot
- Finite temperature numerical renormalization group study of the Mott-transition
- Vibrational sidebands and dissipative tunneling in molecular transistors
- Tunneling broadening of vibrational sidebands in molecular transistors
- Strongly correlated regimes in a double quantum-dot device
- Many Body Effects on the Transport Properties of Single-Molecule Devices
- Numerical Renormalization Group Study of the Anderson-Holstein Impurity Model
- Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
- Vibrational Sidebands and Kondo-effect in Molecular Transistors
- Properties of anisotropic magnetic impurities on surfaces
- Quantum transport through a deformable molecular transistor
- Regular and Singular Fermi Liquid fixed points in quantum impurity models
- Singular Dynamics of Underscreened Magnetic Impurity Models
- Universal transport signatures in two-electron molecular quantum dots: gate-tunable Hund's rule, underscreened Kondo effect and quantum phase transitions
- Correlated electron physics in multilevel quantum dots: phase transitions, transport, and experiment
- Singlet-triplet transition in a lateral quantum dot
- Singular conductance of a spin 1 quantum dot
- Magnetoconductance through a vibrating molecule in the Kondo regime
- Quantum Monte Carlo method for models of molecular nanodevices
- Electronic Transport through Magnetic Molecules with Soft Vibrating Modes
- Conductance of deformable molecules with interaction
- Conductance of a spin-1 quantum dot: the two-stage Kondo effect
- Quantum Transport Through a Stretched Spin--1 Molecule
- Phonon-assisted tunneling and two-channel Kondo physics in molecular junctions
- Evidence of quantum criticality in the doped Haldane system Y2BaNiO5
- Electron-Phonon Correlation Effects in Molecular Transistors
- Effective Hamiltonian for transition-metal compounds. Application to Na_xCoO_2
- Kondo screening in high-spin side-coupled two-impurity clusters
- Suppression of Kondo-assisted co-tunneling in a spin-1 quantum dot with Spin-Orbit interaction