Temperature effect in the conductance of hydrogen molecule

Abstract

We present a many-body calculation for the conductance of a conducting bridge of a simple hydrogen molecule between $Pt$ electrodes.The experimental results showed that the conductance $G=dI/dV$ has the maximum value near the quantum unit $G_0=2e^2/h$. The $I-V$ dependence presents peak and dip and we consider that the electron-phonon interaction is responsible for this behavior. At T=0 there is a step in this dependence for the energy of phonons ${\omega }_0$ which satisfies $eV={\omega }_0$. We calculated the conductance at finite temperature and showed that $dG(T)/dV\propto 1/4T{\cosh }^2\frac{eV-{\omega }_0}{2T}$.

3 pages

References in corpus (19)

• Measurement of the conductance of a hydrogen molecule
• Molecular Transport Junctions: Vibrational Effects
• Inelastic electron tunneling spectroscopy in molecular junctions: Peaks and dips
• Electrical generation and absorption of phonons in carbon nanotubes
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• Stretching dependence of the vibration modes of a single-molecule Pt-H2-Pt bridge
• Universal features of electron-phonon interactions in atomic wires
• Current hysteresis and memory effect in a molecular quantum dot with strong electron-vibron interaction
• Phonon-mediated negative differential conductance in molecular quantum dots
• Vibration-induced correction to the current through a single molecule
• Quantum transport through a deformable molecular transistor
• Dynamical symmetry breaking in transport through molecules
• Superconducting transport through a vibrating molecule
• Quantum Monte Carlo method for models of molecular nanodevices
• Transport through a molecular quantum dot in the polaron crossover regime
• Phonon Squeezing in a Superconducting Molecular Transistor
• Surface imaging of inelastic Friedel oscillations
• Electron-Phonon Correlation Effects in Molecular Transistors