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

H. Takata, M. S. Islam, K. Ienaga, Yuji Inagaki, Kenichi Hashizume, Tatsuya 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

Fingerprint

palladium
hydrogen
trapping
spectroscopy
atoms
ballistics
deuterium
phonons
energy levels
electric potential
liquids
electrons
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Low-temperature hydrogen absorption in metallic nanocontacts studied by point-contact spectroscopy measurements. / Takata, H.; Islam, M. S.; Ienaga, K.; Inagaki, Yuji; Hashizume, Kenichi; Kawae, Tatsuya.

In: Journal of Physics: Conference Series, Vol. 897, No. 1, 012009, 21.09.2017.

Research output: Contribution to journalConference article

@article{765899bfcfcb4fa0a5c4ba277ddc78fe,
title = "Low-temperature hydrogen absorption in metallic nanocontacts studied by point-contact spectroscopy measurements",
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.",
author = "H. Takata and Islam, {M. S.} and K. Ienaga and Yuji Inagaki and Kenichi Hashizume and Tatsuya Kawae",
year = "2017",
month = "9",
day = "21",
doi = "10.1088/1742-6596/897/1/012009",
language = "English",
volume = "897",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "1",

}

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, Yuji

AU - Hashizume, Kenichi

AU - Kawae, Tatsuya

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.

UR - http://www.scopus.com/inward/record.url?scp=85032437652&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85032437652&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/897/1/012009

DO - 10.1088/1742-6596/897/1/012009

M3 - Conference article

VL - 897

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012009

ER -