Electron scattering effects at physisorbed hydrogen molecules on break-junction electrodes and nanowires formation in hydrogen environment

• Veröffentlicht in: Физика низких температур
• Datum: 2012
• ISSN: 0132-6414
• Hauptverfasser: van der Maaіs, M., Vasnyov, S., Hendriksen, B.L.M., Shklyarevskii, O.I., Speller, S.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Schlagworte: Наноструктуры при низких температурах
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/117245
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Electron scattering effects at physisorbed hydrogen
 molecules on break-junction electrodes and nanowires
 formation in hydrogen environment / M. van der Maaіs, S. Vasnyov, B.L.M. Hendriksen, O.I. Shklyarevskii, S. Speller// Физика низких температур. — 2012. — Т. 38, № 6. — С. 660-666 . — Бібліогр.: 32 назв. — англ.

The physisorption of hydrogen molecules on the surface of gold and other coinage metals was studied using
 distance tunneling spectroscopy. We observed strong N-shaped deviation of the tunnel current (resistance) vs
 distance dependences from the exponential one. Such deviations are difficult to explain in the framework of the
 Tersoff–Hamann approximation. We suggest the scattering of the tunneling electrons by H₂ molecules as origin
 for observed effect. We found that this phenomenon is also common for strongly adsorbed organic molecules
 with one anchoring group. Pulling Au, Cu and Pt nanowires at 22 K in hydrogen environment show that the electrodes
 of break junctions are still connected up to very low conductances of 10⁻⁴–10⁻⁶ G₀ through hydrogen–metal
 one-atom chains.