TY - JOUR
T1 - Low-temperature hydrogen absorption in metallic nanocontacts studied by point-contact spectroscopy measurements
AU - Takata, H.
AU - Islam, M. S.
AU - Ienaga, K.
AU - Inagaki, Y.
AU - Hashizume, K.
AU - Kawae, T.
N1 - Funding Information:
We would like to express our decent gratitude to the Japan Society for the Promotion of Science for providing the financial support by a Grant-in-Aid for Scientific Research (Grant Nos. 25220605, 25287076 and 26600102).
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/9/21
Y1 - 2017/9/21
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/897/1/012009
DO - 10.1088/1742-6596/897/1/012009
M3 - Conference article
AN - SCOPUS:85032437652
SN - 1742-6588
VL - 897
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012009
T2 - 1st Asian ICMC and CSSJ 50th Anniversary Conference
Y2 - 7 November 2016 through 10 November 2016
ER -