Conductance of single-atom platinum contacts: Voltage-dependence of the conductance histogram
arXiv:cond-mat/0212062 · doi:10.1103/PhysRevB.67.245411
Abstract
The conductance of a single-atom contact is sensitive to the coupling of this contact atom to the atoms in the leads. Notably for the transition metals this gives rise to a considerable spread in the observed conductance values. The mean conductance value and spread can be obtained from the first peak in conductance histograms recorded from a large set of contact-breaking cycles. In contrast to the monovalent metals, this mean value for Pt depends strongly on the applied voltage bias and other experimental conditions, ranging from about 1 to 2.5 times 2e^2/h. We propose that the different results in part can be explained by the inclusion of hydrogen in the contacts. The bias dependence of the conductance is on the other hand due to the electron current that destabilizes monatomic Pt chains at high bias.
4 pages, 4 figures
References in corpus (8)
- The SIESTA method for ab initio order-N materials simulation
- Efficient index handling of multidimensional periodic boundary conditions
- Density functional method for nonequilibrium electron transport
- Quantum properties of atomic-sized conductors
- Formation and manipulation of a metallic wire of single gold atoms
- Measurement of the conductance of a hydrogen molecule
- Common Origin for Surface Reconstruction and the Formation of Chains of Metal Atoms
- Conductance fluctuations as a tool for investigating the quantum modes in atomic size metallic contacts
Cited by in corpus (27)
- Conserving GW scheme for nonequilibrium quantum transport in molecular contacts
- Observation of a parity oscillation in the conductance of atomic wires
- Absence of magnetically-induced fractional quantization in atomic contacts
- Benchmark density functional theory calculations for nano-scale conductance
- Non-equilibrium GW approach to quantum transport in nano-scale contacts
- Theoretical analysis of the conductance histograms and structural properties of Ag, Pt and Ni nanocontacts
- Conductance oscillations in zigzag platinum chains
- Conductance saturation in a series of highly transmitting molecular junctions
- Metallic, Magnetic and Molecular Nanocontacts
- Ballistic magnetoresistance in nickel single-atom conductors
- Interference and k-point sampling in the supercell approach to phase-coherent transport
- Electronic transport and vibrational modes in the smallest molecular bridge: H2 in Pt nanocontacts
- Experimental determination of conduction channels in atomic scale conductors based on shot noise measurements
- Different wavelength oscillations in the conductance of 5d metal atomic chains
- Transport in magnetically ordered Pt nanocontacts
- Mechanical properties of Pt monatomic chains
- The molecular signature of highly conductive metal-molecule-metal junctions
- Thermal conductance of metallic atomic-size contacts: Phonon transport and Wiedemann-Franz law
- Electron transport in a Pt-CO-Pt nanocontact: First-principles calculations
- Probing the Orbital Origin of Conductance Oscillations in Atomic Chains
- Pulling Platinum Atomic Chains by Carbon Monoxide Molecules
- Interaction of a CO molecule with a Pt monatomic wire: electronic structure and ballistic conductance
- Quantized thermal conductance in metallic heterojunctions
- Current noise enhancement: channel mixing and possible nonequilibrium phonon backaction in atomic-scale Au junctions
- Platinum atomic contacts: from tunneling to contact
- Conductance of Ferro- and Antiferro-magnetic single-atom contacts: A first-principles study
- Conductance of single-atom magnetic junctions: A first-principles study