Results of an experimental study of palladium nanojunctions in hydrogen environment are presented. Two new hydrogen-related atomic configurations are found, which have a conductances of ~0.5 and ~1 quantum unit (2e^2/h). Phonon spectrum measurements demonstrate that these configurations are situated between electrodes containing dissolved hydrogen. The crucial differences compared to the previously studied Pt-H_2 junctions, and the possible microscopic realizations of the new configurations in palladium-hydrogen atomic-sized contacts are discussed.
@article{arxiv.cond-mat/0404538,
title = {Conductance of Pd-H nanojunctions},
author = {Sz. Csonka and A. Halbritter and G. Mihaly and O. I. Shklyarevskii and S. Speller and H. van Kempen},
journal= {arXiv preprint arXiv:cond-mat/0404538},
year = {2007}
}