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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - Sep 21 2017|
|Event||1st Asian ICMC and CSSJ 50th Anniversary Conference - Kanazawa, Japan|
Duration: Nov 7 2016 → Nov 10 2016
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)