Low-temperature hydrogen absorption in metallic nanocontacts studied by point-contact spectroscopy measurements

H. Takata, M. S. Islam, K. Ienaga, Y. Inagaki, K. Hashizume, T. Kawae

Research output: Contribution to journalConference article

Abstract

We report on hydrogen (H) and deuterium (D) atoms absorption below T = 20 K in metallic palladium (Pd) via quantum tunnelling (QT). When a small bias voltage is applied between Pd nanocontacts that are immersed in liquid H2 (D2), the differential conductance spectra measured by point-contact spectroscopy change enormously. The results indicate H (D) absorption in Pd nanocontacts at the temperature where H (D) absorption due to thermal hopping process is not expected, and can be explained by QT. The QT occurs when the energy level of the potential well trapping the H (D) atom coincides with those not trapping the H (D) atom, and is assisted by phonons induced by ballistic electrons.

Original languageEnglish
Article number012009
JournalJournal of Physics: Conference Series
Volume897
Issue number1
DOIs
Publication statusPublished - Sep 21 2017
Event1st Asian ICMC and CSSJ 50th Anniversary Conference - Kanazawa, Japan
Duration: Nov 7 2016Nov 10 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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