Conductance oscillations in zigzag platinum chains

Details Conductance oscillations in zigzag platinum chains Conductance oscillations in zigzag platinum chains

2005-05-19

arxiv.org/abs/cond-mat/0505487v2

Physical Review Letters 95, 256804 (2005)

Physics

Condensed Matter

Materials Science

4 pages. 5 Figures. Version with a new reference

Scientific paper

10.1103/PhysRevLett.95.256804

Using first principles simulations we perform a detailed study of the structural, electronic and transport properties of monoatomic platinum chains, sandwiched between platinum electrodes. First we demonstrate that the most stable atomic configuration corresponds to a zigzag arrangement that gradually straightens as the chains are stretched. Secondly, we find that the conductance at equilibrium atomic spacing does not oscillate with the number of atoms $n$ in the chain, but instead decreases almost monotonically with $n$. In contrast, the conductances of chains of fixed $n$ oscillate as the end atoms are pulled apart, due to the gradual closing and opening of conductance channels as the chain straightens.

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